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Andrena nida Mitchell, 1960
Life   Insecta   Hymenoptera   Apoidea   Andrenidae   Andrena
Subgenus: Parandrena

Andrena nida, m, face, Montgomery Co ---.
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Andrena nida, m, face, Montgomery Co ---.

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Andrena nida, figure52a
Mitchell, Bees of the Eastern United States, Vol. I, 1960 · 1
Andrena nida, figure52a
Andrena nida, figure55c
Mitchell, Bees of the Eastern United States, Vol. I, 1960 · 1
Andrena nida, figure55c

Andrena nida, 189839, female, hummeral ridge interrupted by suture along dorsoventral ridge
© USDA Bee Biology and Systematics Laboratory, Logan Utah · 1
Andrena nida, 189839, female, hummeral ridge interrupted by suture along dorsoventral ridge
Andrena nida, male, face
© Rebekah Andrus Nelson · 1
Andrena nida, male, face

Andrena nida, female, face
© Rebekah Andrus Nelson · 1
Andrena nida, female, face
Overview
Reprinted with permission of the American Entomological Society from: LaBerge, W. E., Ribble, D. W. 1972. A revision of the bees of the genus Andrena of the Western Hemisphere. Part V: Gonandrena, Geissandrena, Parandrena, Pelicandrena. Transactions of the American Entomological Society 98: 271-358.

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Andrena nida is a small eastern species closely related to andrenoides and similar in appearance to the dark form of andrenoides. Both sexes of nida differ from those of andrenoides by the shorter vertex, the more coarsely sculptured dorsal enclosure of the propodeum and the duller integument of the mesoscutum and metasomal terga. The male of nida lacks the basal mandibular yellow macula present in andrenoides and has the first flagellar segment shorter in relation to the second segment.

Among the Robertson specimens of andrenoides from Carlinville, Illinois, two females and one male (in copulo with one of the females) proved to be specimens of nida. This means that several of the Robertson papers listed in the synonymy of andrenoides should also apply in part to nida. As we cannot now say which of these papers apply to nida as well as to andrenoides and in order to conserve space, we have included only Robertson's general summary of his floral works in the above synonymy of nida.

FEMALE. MEASUREMENTS AND RATIOS. N = 20; length, 9-11 mm; width, 2.5-3.0 mm; wing length, M = 3.61 0.093 mm; FL/FW, M = 1.00 0.003; FOVL/FOVW, M = 4.18 0.040.

INTEGUMENTAL COLOR. Generally as in dark form of andrenoides except wing membranes only slightly infumate.

STRUCTURE. Antennae as in andrenoides. Eyes each four times as long as broad or longer, inner margins parallel or slightly converging towards mandibles. Mandibles and galea as in andrenoides. Labial palpus as in andrenoides but segmental ratio about as 1.0:0.6:0.6:0.5. Maxillary palpus as in andrenoides but ratio about as 0.8:1.0:0.9:0.7:0.7:0.7. Labrum and process as in andrenoides. Clypeus as in andrenoides but punctures sparser, laterally separated largely by one puncture width or more, sparser medially and impunctate midline often reduced, surface reticularly shagreened except apicomedially where shiny and unshagreened or delicately, transversely shagreened. Supraclypeal area and face above antennal fossae as in andrenoides. Facial fovea as in andrenoides but somewhat narrower, especially below, separated from lateral ocellus by one ocellar diameter or slightly less. Vertex extremely short, when head in full facial view lateral ocellus almost hides posterior margin above ocellus, vertex above lateral ocellus with head tipped slightly down equals less than half an ocellar diameter. Genal area as in andrenoides.

Pronotum as in andrenoides but weak longitudinal rugulae often present. Mesoscutum as in andrenoides but surface opaque, tessellate even posteromedially. Scutellum and mesepisternum as in andrenoides. Propodeum as in andrenoides but dorsal enclosure coarsely granular except along apical margin, rarely granular only in basal half to one-third. Wing venation and tibial spurs as in andrenoides.

Metasomal terga and sterna punctured as in andrenoides but terga only moderately shiny, reticularly shagreened. Pygidial plate as in andrenoides.

VESTITURE. Generally as in andrenoides but ochraceous especially on thoracic dorsum and terga 2-4 with apical pale bands thicker, slightly more narrowly interrupted medially.

MALE. MEASUREMENTS AND RATIOS. N = 20; length, 7.5-10.0 mm; width, 1.5-2.5 mm; wing length, M = 3.14 0.171 mm; FL/FW, M = 1.01 0.006; FS1/FS2, M = 1.42 0.031.

INTEGUMENTAL COLOR. As in andrenoides except as follows: mandible without basal yellow macula; parocular yellow macula smaller, posterior margin extends from tentorial pit sinuously to eye margin but never exceeds level of posterior margin of clypeus (never reaching level of antennal fossae as in andrenoides); wing membranes colorless or almost so.

STRUCTURE. Antennae as in andrenoides but flagellar segment 1 equals segment 2 plus half of segment 3. Eyes, mandible and galea as in andrenoides. Labial palpus as in andrenoides but ratio about as 1.0:0.7:0.6:0.7. Maxillary palpus as in andrenoides but ratio about as 0.8:1.0:0.9:0.8: 0.7:0.8. Labrum and process as in andrenoides. Clypeus as in andrenoides but punctures sparser, laterally separated mostly by one puncture width, and surface dulled by fine reticular shagreening except shiny apicomedially. Supraclypeal area and face above antennal fossae as in andrenoides. Vertex short, as in female. Genal area as in andrenoides.

Thoracic form and sculpturing as in andrenoides except as follows: mesoscutum opaque, dulled by fine tessellation; propodeum with dorsal enclosure coarsely granular except near apex (rarely granular only in basal half or less). Wing venation and tibial spurs as in andrenoides.

Metasomal sculpturing as in andrenoides but terga more densely shagreened, moderately shiny to dull. Sternum 6 with apical margin broadly and shallowly emarginate, lateral corners reflexed but not quite at right angles with surface, blunt, scarcely toothlike. Terminalia as in andrenoides except as follows: gonocoxite with angle an inner margin at base of apical process weak, rounded; penis valves with ventrolateral lamellae smaller than dorsolateral lamellae. Sterna 7 and 8 as figured (Figs. 46-47).

VESTITURE. Generally as in andrenoides but dorsal thoracic hairs ochraceous, sternal fimbriae extremely weak.



Reprinted with permission from: Mitchell, T.B. 1960. Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 141.

FEMALE. Length 8 mm.; face considerably longer than distance between eyes; eyes subparallel; foveae rather narrow, occupying above slightly more than half of space between eyes and ocelli; vertex very narrow, lateral ocelli less than half their own diameter from its hind margin; cheeks very slightly broader than eyes; clypeus broadly convex, protruding about one-half below suborbital line, shining medially, with sparse punctures, becoming rather closely, finely and distinctly punctate laterally; face below ocelli dull, finely striate, vertex dull but smooth, without evident punctures, cheeks somewhat shining, punctures exceedingly minute and hardly visible; malar space short but distinct; process of labrum very small and short, broadly subtriangularly; basal segment of flagellum about equal to segments 2 and 3 combined, median segments very slightly longer than broad; pubescence of head and thorax entirely pale, rather whitish below, becoming somewhat yellowish above, rather dense, elongate and erect; scutum smooth but rather dull, finely tessellate, punctures very minute, well separated even anteriorly, becoming rather sparse in center of disc, scutellum shining, with scattered, very fine, irregular punctures; pleura dull beneath the copious, elongate pubescence, somewhat tessellate, without visible punctures; dorsal area of propodeum with a few irregular striae toward basal margin, becoming tessellate along margins, lateral areas smooth but dull and tessellate; propodeal corbicula well developed, dorsal hairs elongate and densely plumose, interior without hairs, with a quite distinct anterior fringe; propodeal corbicula complete, well developed, with extremely long, curved hairs, these approaching in length the length of the femur; legs dark basally, becoming somewhat reddened on tarsi, pubescence entirely pale, basitarsi rather narrow, hind tibiae slender and elongate, scopa of pale yellowish, rather elongate hairs; wings subhyaline, veins and stigma pale yellow, with but two submarginal cells, 2nd submarginal receiving 1st and 2nd recurrent veins at about equal distances from base and apex; tegulae yellowish-hyaline, becoming narrowly piceous toward base; abdominal terga quite smooth, with minute, scattered, rather widely separated but distinct punctures, apical margins impressed for about one-third their median length, these areas somewhat yellowish, becoming narrowly hyaline along rims, discal pubescence hardly evident but erect and whitish where visible toward sides, fasciae evident laterally on segments 2-4, interrupted on segment 2, apical fimbria golden.

MALE. Length 8 mm.; face rather broad, median length about equal to distance between eyes; eyes subparallel; lateral ocelli separated from margin of vertex by slightly less than their own diameter; cheeks considerably broader than eyes, rather flat, with an obscure, posterior angle opposite middle of eye; clypeus short and quite broad, entirely yellow except for the dark apical rim and a pair of dark spots, polished, with minute, scattered but rather distinct punctures; face with yellow maculae between clypeus and lower margin of eye, these not extending to level of upper margin of clypeus; face below ocelli dull, densely rugoso-striate, vertex and cheeks dull, tessellate, without visible punctures; malar space hardly evident; process of labrum very small, broadly subtriangular, median length no more than half basal width; flagellum brownish-testaceous beneath, more piceous above and the basal segment blackish, somewhat longer than segment 2 but considerably shorter than 2 and 3 combined, median segments considerably longer than broad; mandibles somewhat elongate and slender, tips extending slightly beyond lateral apical angles of clypeus, but not nearly reaching base of opposite mandible; pubescence of head and thorax entirely pale yellowish, becoming somewhat deeper ochraceous on vertex and dorsum of thorax; scutum dull and tessellate, with shallow, fine, scattered and rather evenly distributed punctures, scutellum somewhat more shining, punctures minute and obscure; pleura dull, tessellate beneath the copious elongate pubescence, without distinct punctures; dorsal area of propodeum with rather coarse irregular rugae in center, becoming smoother and more tessellate along lateral margins, lateral areas densely tessellate; propodeal corbicula quite elongate and well developed; legs dark, with entirely pale yellowish pubescence, slender and elongate, the more apical tarsal segments becoming testaceous, spurs pale testaceous; wings very pale yellowish or subhyaline, veins and stigma pale testaceous, with but two submarginal cells, the 2nd receiving 2nd recurrent slightly nearer apex than 1st is to base; tegulae dark anteriorly, more yellowish-hyaline posteriorly; abdominal terga smooth but rather dull, with exceedingly minute, rather evenly distributed but rather sparse punctures barely evident, apical margins of segments 2-4 shallowly impressed, these areas becoming narrowly hyaline along rims, discal pubescence short but distinct and erect, entirely pale yellowish, apical fasciae evident on segments 2-4, rather widely interrupted on segment 2; sternum 7 rather broadly produced medially, this area very shallowly emarginate medially; sternum 8 angulate on each side toward base, the apical, produced area parallel-sided, truncate, rather broad and with short pubescence; penis valves bulbous toward base but quite slender apically, gonocoxites gradually dilated toward the triangularly broadened apex, gonocoxal lobes slightly produced.

TYPES. Holotype: Male, Currie, Pender Co., N. C., April 7, 1951 (Mitchell, on Amelanchier) [author's coll.]. Allotype: Female, Raleigh, N. C., March 13, 1938 (Mitchell, at nest site in sand near creek) [author's coll.]. Paratypes: NORTH CAROLINA: 1 F, Raleigh, Apr. 4, 1925 (in sand bank); 1 M, 1 F, Raleigh, Mar. 15, 1945 (on Salix); 4 FF, Raleigh, Apr. 12, 1947 (at burrows); 2 FF, Raleigh, Mar. 13, 1938 (at burrows); 1 F, Raleigh, Mar. 12, 1950 (on Prunus); 1 M, White Lake, Mar. 14, 1953 (on Amelanchier); 2 MM, Holly Shelter, Mar. 12, 1954 (on Prunus); 2 FF, Wallace, Mar. 28, 1929 (on Salix) (all Mitchell); 1 F, Raleigh, Mar. 20 (C. S. Brimley, on Salix); 1 M, New River, Apr. or May, 1942 (G. E. Bohart). DISTRICT OF COLUMBIA: 1 M, 1 F, Washington, May 7 & 15, 1944 (G. E. Bohart). MICHIGAN: 1 M, Newaygo Co., May, 1956 (Dreisbach). MISSISSIPPI: 1 M, Vicksburg, Mar. 11, 1955 (Dreisbach). MARYLAND: 2 MM, Laurel, Apr. 13, 1919 (W. L. McAtee, on Salix); 1 M, Branchville to Hyattsville, Apr. 10, 1915 (W. L. McAtee, on Salix); 1 M, near Plummer's Is., Apr. 16, 1916 (H. L. Viereck, on Salix).

Paratypes are located in the U. S. National Museum, the North Carolina Department of Agriculture, and in the collections of R. R. Dreisbach and the author.

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