568 PROCEEDINGS OF THE ACADEMY OF [Nov., 



stramineous, anal process spatulate and stramineous at apex, not 

 emarginate, tergum with its hairs not supplemented on the sides of 

 the second, third and fourth tergites by apical hair bands. 



Andrena (Andrena) obscuripostica new species. 



Type. — No. 4,016. The Academy of Natural Sciences of Phila- 

 delphia. 



Type Locality. — Nevada (H. K. Morrison). 



Related, presumablj', to A. (A.) apacheorum Cockerell. 



Female. — Length 9 mm.; body black, covered with pale ochreous 

 pubescence; head with its facial line : transfacial line :: 53 : 74, 

 axial line : temporal line :: 29 : 17, black, its pubescence ochreous 

 except along the lower edge of the labrum where it is reddish brown, 

 along the lower edge of the mandibles where it is brownish and in 

 the foveae where it is seal-brown, except for the long blackish hairs 

 and on the occiput and temples where it is whitish, fovea apparently 

 at most two-thirds as wide along the ocellocular line than the latter 

 is long, hardly separated from the eye margin where the ocellocular 

 line joins the latter, fovea shallow, fovarea wanting, fovea extending 

 distinctly below the antennal line but apparently falling short of the 

 clypeal line, clypearea wanting, clypeal punctures distinct, most of 

 the punctures from one to two puncture widths apart, the interstices 

 partly polished partly reticulated on the disc, elsewhere reticulated 

 throughout, clypeus convex, deeply, transversely impressed just 

 before the apical edge, mandibles black except for the apical two- 

 thirds of the inner margin and all of the apical third which are 

 reddish castaneous, palpi typical, joint 3 of antennae : 4 + 5 :: 9 : 8, 

 antennas blackish brown, labrarea broad and short, subemarginate, 

 nearly as wide at apex as at base, four times as wide at base as long- 

 down the middle, malar space virtually crowded out by the eye; 

 thorax black with thin ochreous pubescence above and whitish 

 pubescence on the pleurae, dorsulum mostly dull and finely reticulated, 

 with indistinct punctures that are as many as four to five puncture 

 widths apart, scutel sculptured like the dorsulum, metanotum densely 

 sculptured, legs pubescent like the pleurae except that the hairs of 

 the tibiae and tarsi are brownish golden, scopa golden, its hairs not 

 dense enough to obscure the tegument, their arrangement and 

 character typical, tarsi and hind tibiae dark brown, rest of legs darker, 

 tegulae and wing base dark brownish stramineous to blackish, stigma 

 pale brownish stramineous, subcosta blackish brown, border of stigma 

 and remaining veins brownish stramineous, darker than the stigma,- 

 first recurrent vein received by the second submarginal cell a little 



