Mr. T. D. A. Cockerell on Bees. 27 



mandibles black, the extreme ti)3 faintly reddish ; process of 

 labrum with a concave truncation ; facial fovese broad but 

 shoit, going little below level of antennae and not departing 

 from orbital margin ; thorax with abundant erect hair, pale 

 iulvous dorsally, with no black intermixed; mesothovax dull 

 and microscopically tessellate, with minute scattered punc- 

 tures ; enclosure of raetathorax minutely roughened, scarcely 

 defined except by absence of pubescence ; legs black, scopa 

 on hind femora and tibite abundant and dense, hind knees 

 with a ifinge of sooty hairs ; hair on inner side of basal joint 

 of hind tarsi pale ; tegulfe shining very dark brown ; wings 

 strongly yellowish, greyish at apex ; stigma and nervures 

 yellowish ferruginous, second submarginal cell much broader 

 above than third ; abdomen broad, minutely roughened, not 

 punctate, with dense ochreous hair-bands on hind margins of 

 segments 2 to 4, that on 2 broadly interrupted in the middle ; 

 apical fringe rather pale sooty. In lloberrsou's tables runs 

 to A. saNcis, but is quite distinct from that by the short 

 facial fovea3 and dense abdominal bands. 



JJab. Colorado Springs, Colorado, April 22, at female 

 flowers of JSah'x, collected by W. P. Cockerell. 



Named after Mr. H. L. Viereck, who is doing such excel- 

 lent work on Andrena. Mr. Viereck tells me that ^. Vierecki 

 is allied to A. pacta, Vier,, but it has the dorsulum dull 

 (shining \n pacta) and the fimbria dusky (ochreous \\\ pacta) . 



Andreiia leiHantlii, Viereck & Cockerell, sp. n. 



S . — Length about 9 mm. 



]jlack, with long ochraceous pubescence ; clypcus smooth 

 and shining, with sparse shallow jjunctures, not concealed by 

 hair, bright lemon-yellow, except the narrow anterior margin 

 and the usual two spots, which are broadly V-shapod ; facial 

 quadrangle broader than long ; clypeus much produced ; 

 malar space ^axy large, almost square; mandibles black, 

 faintly reddish at apex, very long and curved, with a short 

 inner tooth ; process of labrum rather broadly truncate, the 

 corners rounded ; antennas long, black, faintly brownish 

 beneath, joint 3 perhaps a trifle longer than 4 + 5; cheeks 

 broad, the sides of the head behind produced into prominent 

 angles about level with the middle of the upper half of the 

 eye; mesothorax rather shining, with distinct but sparse 

 ])unctures : enclosure of metathorax small, without a rim 

 minutely rugose, with a slight tendency to wrinkling; legs 

 including tarsi, black, with reddish-ochreous hair ; teo-ulaa 

 dark; wings slightly greyisii, strongly so at apex; stfgma 



