Reprinted with permission of the University of Nebraska State Museum from:|
LaBerge, W. E. 1967. A revision of the bees of the genus Andrena of the Western Hemisphere. Part I. Callandrena (Hymenoptera: Andrenidae). Bulletin of the University of Nebraska State Museum 7: 1-316.
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This small species, together with A. tegularis, are unique among the Callandrena in having the tegulae distinctly punctate. The female of perpunctata can be distinguished from that of tegularis by the lack of the mandibular basoventral lamella and the male of perpunctata can be readily told from that of tegularis by its entirely black clypeus. In spite of the similarity of the punctation, perpunctata is probably more closely related to solivaga than to tegularis. A. perpunctata resembles solivaga in lacking the mandibular basoventral lamella, in the crowded mesoscutal punctures and in the relatively coarsely sculptured propodeal dorsal enclosure.
FEMALE. MEASUREMENTS AND RATIOS. — N = 5; length, 8-9 mm; width, 2.5-3.0 mm; wing length, M = 2.74 ± 0.359 mm; FL/FW, M = 1.12 ± 0.022; FOVL/FOVW, M = 3.16 ± 0.165.
INTEGUMENTAL COLOR. — Black except as follows: mandible rufescent; flagellar segments 3-10 dark reddish-brown below; tegulae piceous; wing membranes hyaline, slightly infumate, especially apically, veins dark reddish-brown; terga 1-4 extremely narrowly hyaline apically, slightly rufescent just basad of hyaline margins; sterna 2-5 narrowly hyaline apically, basally dark rufescent; distitarsi rufescent; tibial spurs yellow.
STRUCTURE. — Antennae moderately long; scape length equals flagellar segments 1-4 or almost so; flagellar segment 1 slightly, if any, longer than segments 2 plus 3; segment 2 equal in length to 3 and distinctly shorter than segment 4; segments 4ó9 at least as broad as long, segment 10 longer than broad. Eye slightly more than three and one-half times as long as broad, inner margins parallel. Malar space linear. Mandible bidentate; outer mandible; extends beyond Huddle of labrum by about one-third its length; basoventral angle (.and lamella absent.; subgenal coronet well developed. Galea as in simulata. Maxillary palpus as in simulata but segmental ratio about 1.1:1.0:0.9:0.9:0.7:0.9. Labial palpus as in simulata but segmental ratio about 1.7:1.0:0.5:0.7. Labral process three times as broad as long or slightly broader, the tip usually slightly turned outwards, entire or extremely shallowly emarginate medially. Clypeus as in simulata except as follows: impunctate median area narrow; punctures extremely coarse, medially obliquely elongated, smaller peripherally; surface shiny medially, peripherally dulled by reticular shagreening. Supraclypeal area with small, deep, close-set punctures, surface shiny, shagreening delicate. Genal area slightly narrower than eye in profile; punctures deep, separated mostly by one-half to puncture width, surface shiny, unshagreened near eye margin, July shagreened posteriorly. Vertex above lateral ocellus equals ocellar diameter or slightly more; punctures small, deep, d, crowded above ocelli, scattered but rather regularly so ally, surface moderately shiny, reticularly shagreened. Face antennal fossae with distinct rugulae reaching ocelli, interspaces densely punctate, surface moderately shiny. Facial fovea deep, narrow, oblique, extending below to level of upper margin of antennal fossa or slightly below, rounded above or slightly angulate near lateral ocellus, separated from lateral ocellus by half an ocellar diameter or slightly more.
Pronotum normal, with minute round punctures separated mostly by half a puncture width except sparser anteriorly, surface moderately dulled by reticular shagreening. Mesoscutum with round,, moderate-sized, deep punctures separated by mere ridges, surface moderately shiny medially to dull peripherally, reticularly shagreened; parapsidal line longer than from its anterior end to margin; of scutum. Tegulae distinctly narrowed anteriorly, with small round; distinct punctures separated mostly by one puncture width or slightly more, shiny. Scutellum and metanotum like mesoscutum but metanotum dull and punctures smaller. Propodeum with dorsal enclosure irregularly rugulose, often near apex with rugulae largely transverse; dorsolateral and posterior surfaces with small punctures separated mostly by half a puncture width, moderately shiny, with delicate reticular shagreening; corbicular area with sparse punctures anteriorly and near dorsal margin, surface shiny with coarse reticular shagreening. Mesepisternum with deep round punctures separated by halt a puncture width or less except sparser posteriorly, surface dulled by fine reticular shagreening. Metepisternum with lower portion shiny, unshagreened or delicately so and impunctate, upper third with minute punctures and fine shagreening moderately dulling surface. Middle basitarsus and wing venation as in simulata. Claws and tibial spurs normal.
Metasomal tergum 1 with apical area with minute round crowded punctures except impunctate apical rim, basally with slightly larger punctures separated mostly by half a puncture width or less, surface shiny, with extremely fine, delicate, reticular shagreening. Terga 2-4 like tergum 1. Tergum 5 like 1 but surface moderately dulled by reticular shagreening. Pygidial plate as in simulata. Sterna 2-5 as in simulata but surfaces moderately dull by reticular shagreening.
VESTITURE. — White except as follows: vertex with erect dark brown hairs; mesoscutum posteromedially to level of anterior ma gins of tegulae with short, erect, dark brown hairs; tegulae with ft dark brown hairs on summits; terga 1-4 with basal areas with short, relatively sparse, erect, dark brown hairs; terga 5 and 6 medioapically with long decumbent brown hairs; inner surfaces tarsi with5 hairs golden to golden-brown. Terga 2-4 with apical fasciae weak, of short decumbent white hairs, usually interrupted medially on tergum 2. Sterna 2-5 with indistinct subapical fimbriae. Propodeal corbicula complete anteriorly, with several long barbed hairs internally near anterior margin and along dorsal margin. Trochanteral flocculus complete, weak. Tibial scopal hairs white, plumose throughout, relatively short, especially apically.
MALE. MEASUREMENTS AND RATIOS. — N = 7; length, 6.5-8.0 mm; Width, 1.5-2.0 mm; wing length, M = 2.50 ± 0.247 mm; FL/FW, M = 1.17 ± 0.021; FS1/FS2, M = 1.05 ± 0.033.
INTEGUMENTAL COLOR. — Black except as follows: mandible with at least apical third rufescent; clypeus black; flagellum dark brown to reddish-brown below; tegulae piceous; wing membranes hyaline, slightly infumate, especially apically, veins dark reddish-brown; terga 1-5 with apices extremely narrowly hyaline, yellow; sterna narrowly hyaline apically; distitarsi rufescent; tibial spurs low.
STRUCTURE. — Antennae moderately long, in repose extending back to posterior margins of tegulae or slightly beyond; scape length equals somewhat less than flagellar segments 1-3; flagellar segment 11 only slightly, if at all, longer than segment 2; segment 2 quadrate, distinctly shorter than 3; segments 3-11 longer than broad. Eye about three and one-third times as long as broad, inner margins, converging towards mandibles. Malar space, mandible and galea as in female. Maxillary palpus as in simulata but segmental ratio about 1.3:1.0:0.9:0.7:0.6:0.9. Labial palpus as in simulata but segmental ratio about 2.4:1.0:0.7:1.0. Labral process trapezoidal with apical margin shallowly and broadly emarginate, three times as broad as long or longer, apex thickened or slightly reflexed. Clypeus as in female but not flattened and punctures somewhat smaller. Supraclypeal area, genal area, vertex and face above antennal fossae AS in female.
Thoracic structure and sculpturing as in female except as allows: tegulae with punctures more crowded; scutellum slightly shinier; propodeal dorsolateral and posterior surfaces rugulopunctate, lateral surface moderately dulled by abundant punctures in dorsal half and reticular shagreening. Wing venation as in female.
Metasomal terga 1-5 with subapical areas moderately impressed and apical margins moderately reflexed; sculptured as in female but apical impunctate rim broader. Pseudopygidial area narrow, indistinct. Sterna 2-5 as in female. Sternum 6 flat, with shallow, V-shaped Apical emargination.
Genitalia and sterna 7 and 8 (Figs. 243-247) similar to those of simulata. Note the following structures: penis valves narrow basally; volsellae with minute but distinct teeth; dorsal lobes of gonocoxites short; sternum 7 with almost U-shaped median emargination; sternum 8 entire apically.
VESTITURE. — Generally white to pale ochraceous but slightly darker on vertex and thoracic dorsum; inner surfaces tarsi pale yellow. Terga 2-5 with white apical fasciae but broadly interrupted medially on tergum 2 and usually narrowly interrupted on tergum 3. Sterna 3-5 with subapical fimbriae of long, semidecumbent, curled hairs.
TYPE MATERIAL. — The holotype (SECK) male from 10 miles south of Acatlan, Morelos, Mexico, was collected September 8, 1959, by R. H. Painter at 4800 feet altitude. The allotype female (SECK) from 17 miles north of Chilpancingo, Guerrero, Mexico, was collected by the University of Kansas Mexican Expedition, August 13, 1962. Five female and six male paratypes (SECK; LACM; INHS; MSU) are as follows: Mexico. 335 with the same data as the holotype. Huajitlan, Morelos: 1 female, September 27, 1957, R. and K. Dreisbach; 2 males, August 22, 1956, R. and K. Dreisbach. Yacutepec, Morelos: 1 female, August 19, 1956, R. and K. Dreisbach. United States. 5 miles west of Portal (Chiricahua Mts.), Arizona: 1 female, 1 male, August 18, 1958, P. A. Opler; 1 female, September 3, 1959, G. I. Stage, on Heterotheca subaxillaris. Rodeo (7 miles S.E.), New Mexico: 1 female, August 21, 1958, R. M. Bohart.