566 PROCEEDINGS OF THE ACADEMY OF [Nov., 



nearly typical but loose, hind metatarsi at most nearly as wide as 

 mid metatarsi ; propodeum with its enclosure poorly denned, medially 

 with a shallow impression, finely reticulated throughout and with 

 short weak radiating, crooked plicae along the base, rest of upper face 

 of propodeum sculptured somewhat like the dorsulum but more 

 distinctly and covered with nearly white hair, propodeal pleurae 

 shining, distinctly reticulated and with a few scattered indistinct 

 punctures, and almost hidden by the whitish floccus; abdomen with 

 its tergum shining, finely reticulated and finely indistinctly sparsely 

 punctured, its first and second tergite with long, nearly erect pale 

 ochreous hairs, the succeeding tergites with distinctly shorter pale 

 ochreous hairs that on the fourth and fifth tergites are mixed with a 

 few black hairs, second tergite with its elevated portion down the 

 middle : depressed portion :: 10 : 22, fifth tergite with its sculpture 

 more distinct than that on the preceding tergite, pygidium truncate, 

 black at apex, second and third tergites with a thin apical hair band, 

 fimbria blackish with pale hairs laterally. 



Andrena (Andrena) monogonoparia new species. 



Type. — No. 4,015. The Academy of Natural Sciences of Phila- 

 delphia. 



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



Related to A. (A.) frigida cocker elli Graenicher. 



Male. — Length 8.5 mm.; body black, mostly covered with whitish 

 hair; head with its facial line : transfacial line :: 54 : 70, axial 

 line : temporal line :: 36 : 25, temples produced into a right angle, 

 the angle opposite the middle of the eye, malar line : joint 3 of 

 antennae :: 2 : 8, elevated portion of malar space shorter than the 

 depressed portion, head covered with whitish and black hairs through- 

 out, the white hairs present only on the clypeus, supraclypeal area 

 and to some extent on the vertex, occiput and temples, front rather 

 roughly reticulated and partly indistinctly striate, ocellocular 

 line : ocelloccipital line :: 18 : 6, face shining, distinctly punctured, 

 its punctures mostly from one to two puncture widths apart, the 

 interstices finely reticulated, clypeus apparently slightly convex, 

 elevated directly above the apical margin, nearly polished and 

 punctured much like the face, clypearea wanting, sculpture of the 

 clypeus not hidden by the moustache, labrarea with two faces, 

 emarginate beneath at the apex of the lower face, width at 

 base : length down the middle :: 8 : 3, width at apex : length down 

 the middle :: 25 : 3, labrarea at base apparently half as wide as the 

 labrum, the latter with a fringe of golden hairs, joint 3 of antennae : 



