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Nomada gracilis Cresson, 1863
Nomada inepta Mitchell, 1962

Life   Insecta   Hymenoptera   Apoidea   Apidae   Nomada
Subgenus: None

Nomada gracilis f on Salix 20120330 001
© Copyright Micheal Veit 2010 · 6
Nomada gracilis f on Salix 20120330 001

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Nomada gracilis f on Salix 20120330 007
© Copyright Micheal Veit 2010 · 6
Nomada gracilis f on Salix 20120330 007
Nomada gracilis f on Salix 20120330 011
© Copyright Micheal Veit 2010 · 6
Nomada gracilis f on Salix 20120330 011

Nomada gracilis, Barcode of Life Data Systems
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Nomada gracilis, Barcode of Life Data Systems
Nomada gracilis, female, scape hairs
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Nomada gracilis, female, scape hairs

Nomada gracilis, female, labrum hairs
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Nomada gracilis, female, labrum hairs
Nomada gracilis, female, red scutellum
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Nomada gracilis, female, red scutellum
Overview
Note that N. inepta and possibly N. xanthura are now considered to be a synonymy with N. gracilis.


Identification Summary: Red-haired species

Reprinted with permission from: Mitchell, T.B. 1962 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 152.

MALE—Length 7.5-9 mm.; lateral ocelli slightly nearer margin of vertex than to each other; cheeks slightly narrower than eyes. posterior margin subcarinate; antennal scape only slightly swollen, apex deeply excavated, more or less completely enclosing pedicel, longer side of basal segment of flagellum about equal to segment 2, median segments considerably longer than broad; mandibles rather slender and simple apically; wings hyaline basally, becoming lightly and narrowly infuscated along outer margin and in marginal cell, with the usual three submarginal cells, 2nd somewhat broader than 3rd anteriorly, veins and stigma testaceous to ferruginous, basal vein considerably basad transverse median; tegulae shining, punctures rather close along inner margin, becoming very sparse toward outer margin; posterior margin of scutellum rounded, not at all medially; front coxae not spinose; hind femora slender and unmodified; apical third of clypeus yellow, basal two-thirds black, labrum and mandibles bright yellow, and a pair of small, lateral, yellow maculations continuous with the marginal band clypeus, ending very narrowly on eye margin slightly below level of antennae; face, vertex and cheeks otherwise black; antennal scape black, somewhat reddened at apex, basal segment of flagellum more reddish-testaceous, flagellum brownish-testaceous below, piceous above; tubercles and tegulae yellowish-testaceous, thorax otherwise black; coxae black. and femora black in large part, becoming rather narrowly testaceous apically, front and middle tibiae somewhat darkened medially, tarsi pale testaceous, the hind tibiae and tarsi more reddish-testaceous, all spurs pale yellow; abdominal terga piceous in large part, tergum 1 entirely so, tergum 2 with a pair of lateral, extensive, yellow maculations which are rather widely separated medially, but occupy most of disc laterally, terga 3 and 4 with very narrow, transverse, yellow bands that are slightly interrupted medially and are adjacent to the broad, depressed apical rims, terga 5 and 6 dull yellow across median, apical areas piceous basally and laterally; abdominal sterna 2-4 with more or less conspicuous, subapical, transverse, yellow hands, sternum 6 yellow over apical half, sterna otherwise piceous; vertex and face above antennae very coarsely and deeply rugoso-punctate, cheeks somewhat more finely so, supraclypeal area and lateral areas of face below antennae quite coarsely and shallowly rugoso-punctate, clypeus with very minute, densely crowded punctures; scutum, scutellum and mesopleura coarsely rugose, scutellum somewhat more finely so, posterior and lateral faces of propodeum coarsely, shallowly rugose, triangle rather smooth but dull below, becoming irregularly rugoso-striate along upper margin; discs of abdominal terga deeply but very finely and closely punctate, minute punctures invading to some degree the depressed apical margins, only the narrow rims impunctate; tergum 1 impunctate laterally and basally, terga 5 and 6 becoming somewhat more coarsely and sparsely punctate toward the depressed apical margins; pubescence entirely pale, rather long, erect and copious on head and thorax, antennal scape quite copiously, long pubescent, very short, sparse and obscure on abdominal terga, becoming somewhat more elongate and conspicuous apically, very fine but more elongate and erect on abdominal sterna, sternum 6 rather densely short pubescent apically; median length of pygidial plate somewhat less than basal width, rather strongly narrowed apically, apex more or less deeply emarginate, margins carinate, surface very finely, closely and obscurely punctate; exposed sternal plates unmodified, sternum 6 strongly narrowed to .the narrowly rounded apex; sternum 8 with a slender apical process; gonocoxites of genital armature as shown (fig. 107).

DISTRIBUTION—New York and the New England states, March and April.

FLOWER RECORD—Salix.

The following account from Mitchell was originally listed under N. inepta


FEMALE—Length 8-11 mm.; lateral ocelli considerably nearer margin of vertex than to each other; cheeks somewhat narrower than eyes, posterior margin only subcarinate at most; longer side of basal segment of flagellum nearly as long as segment 2, median segments somewhat longer than broad; mandibles slender, elongate and simple; wings subhyaline or pale yellowish basally, becoming rather deeply infuscated along outer margin and in marginal cell, with the usual three submarginal cells, 2nd much broader than 3rd anteriorly, a hyaline area just beyond the 3rd, veins testaceous to piceous, stigma testaceous, basal vein much basad of transverse median; tegulae shining, punctures deep and distinct, but fine, rather close along inner margin, becoming very sparse over outer half; posterior margin of scutellum only slightly impressed or grooved medially; front coxae with short, triangular, spine-like tubercles; apex of hind tibiae with 4 or 5, rather robust, seta-like bristles; head and thorax largely ferruginous, eyes completely encircled with ferruginous, and ocelli largely surrounded by this color, the broad, median area of face above clypeal margin and around antennae, black, this continuing to the ocelli, and posterior two-thirds of cheeks black; antennae testaceous in general; pronotal collar, tubercles and tegulae somewhat more testaceous, thorax otherwise largely ferruginous, scutum with a rather broad, median black band, and a pair of very narrow sublateral black bands, the mesopleura black beneath, ferruginous above; metapleura and adjacent margin of propodeum entirely black, propodeum posteriorly more ferruginous, with a median black line; coxae largely black, more or less infused with testaceous apically, front and middle trochanters testaceous, all femora more piceous, becoming testaceous apically, the tibiae and tarsi testaceous, and spurs pale yellow; abdominal tergum 1 piceous over basal half and across apical impressed area, ferruginous medially; tergum 2 with a broad, lateral, yellow maculation on each side, these widely separated medially, disc otherwise ferruginous, apical impressed area piceous; tergum 3 similar to 2 but with a very small, yellow maculation on each side, sometimes absent; tergum 4 with a subapical, narrow, transverse band which is slightly interrupted medially and is terminated abruptly toward each side; tergum 5 broadly yellow over median half; vertex and face very coarsely, deeply and closely rugoso-punctate, punctures below antennae coarse, deep and distinct on each side, supraclypeal area rather finely rugose, and clypeus with very fine and densely crowded but distinct punctures; cheeks becoming finely rugoso-punctate below; scutum and scutellum coarsely and very closely rugoso-punctate, the mesopleura rather coarsely reticulate above, becoming more distinctly but quite closely and deeply punctate below; propodeum somewhat more finely and quite densely rugose, lateral faces becoming quite smooth anteriorly, triangle rather smooth and dull below, becoming quite coarsely and irregularly striate along upper margin; abdominal tergum 1 becoming impunctate laterally and basally, median punctures extremely minute and close; discs of terga 2-4 with very fine and close punctures, apical margins becoming smooth and impunctate apically, invaded only slightly with very minute, scattered punctures, tergum 5 closely punctate across base, punctures becoming rather coarse and well separated toward apical margin; pseudopygidium transverse, very narrow, forming the rather broad, apical margin of tergum 5, very slightly outcurved, covered with dense, suberect, silvery tomentum; head with very fine, thin, subappressed pubescence and with erect, elongate, dark hairs, conspicuously evident in front and on head below; thoracic pubescence very short, largely inconspicuous and pale, but scutellum with elongate, erect, dark hairs in evidence; pubescence hardly evident on abdomen dorsally, becoming somewhat more elongate and conspicuous apically, sternal plates with fine, elongate, suberect, pale hairs; apex of sternum 5 with a marginal fringe of elongate, brownish hairs that curve and tend to converge toward mid-line.

TYPES — Holotype: Female, Reading, Mass., April 7, 1929 (Richard Dowl [M.C.Z.]. Paratypes: MASSACHUSETTS: 1 female, topotypical; 1 female, Forest Hills, April 6 (or June 4), 1912; 2 females, Wollaston, June 1, 1895 (F. H. Sprague); 1 female, Salem, April 19, 1914 (S. E. Cassino). NORTH CARO LINA: 1 2, Grandfather Mt., Watauga Co.,June 20, 1950. (Mitchell). MAINE: 1 female, Mt. Desert, April 21, 1933 (on Salix); 1 female, Orono, May 6, 1926. NEW HAMP SHIRE: 1 female, Jaifrey, June 19. NEW YORK: 1 female, Ithaca, May 13, 1934 (H. Dietrich). MINNESOTA: 1 female, Itasca Park, LaSalle Valley, May 30, 1935 (C. E. Mickel).

Paratypes are in collections of the Museum of Comparative Zoology, the University of Maine, the University of Minnesota, and the author.


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Updated: 2024-03-28 19:06:15 gmt
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