Ml. T. D. A. CockcrcU on Ii,;-s. '21 



maiulildcs black, tlic extreme tip faintly recUlisli ; piocess <jf 

 ljii)iiim with a concave truncation ; facial foveas broad but 

 .«li(iit, ^oinn; little below level of antennie and not departing 

 from orbital niar<;iii ; thorax with abundant en-et hair, pale 

 fulvous dorsally, with no black internuxed ; nie.sothorax dull 

 and niicropcopically tessellate, with minute scattered punc- 

 tures ; enclosure of metathorax minutely roughened, scarcely 

 delincd excejit by absence of ])ubescence; legs black, scopa 

 on hind teniora and tibia? abundant and dense, hind knees 

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

 oi hind tarsi pale ; tegulte shining very dark brown ; wings 

 strongly yellowish, greyish at apex ; stigma and nervures 

 yellowish lerruginous, second submarginal cdl much broader 

 above than third ; abdomen broad, minutely roughened, not 

 j)unctate, with dense ochreous hair-bands on hind margins of 

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

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

 to A. salicis, but is quite distinct from that by tiie sh(jrt 

 iacial foveie and dense abdominal bands. 



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

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



Named after i\lr. 11. L. Viereck, wiio is doing such cxncl- 

 lent woik on Andreiui. iSlr. Viereck tells me that ^. Vierecki 

 is allied to A. pactci, Vier., but it has the dorsuluin dull 

 (shining \\i pacta) and the linibria dusky (ochreous in j>actu) . 



Andrena leptanthij Viereck <t Cockerell, sj). n. 



cJ . — Length about !• mm. 



lilaek, with long ochraccous pubescence; clypeus smooth 

 and shining, with sparse shallow j)unctures, not concealed by 

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

 and the usual two s[)ots, which are broadly V-^jlapod ; facial 

 quadrangle broader than long ; clypeus much produced ; 

 malar sp-ace WQvy 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 ; antennie long, black, faintly Inowiiish 

 beneath, joint o perhaps a trifle longer than 4 + 5; checks 

 broad, the sides of the head behind produced into prominent 

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

 eye ; mesothorax rather shining, with distinct but sparse 

 punctures : enclosure of metathorax small, without a rim, 

 minutely rugose, with a slight tendency to wriidding; legs, 

 including tarsi, biaek, with reddish-ochrcous hair ; tegula: 

 dark; wings slightly greyish, strongly so at apex; sliguui 



