536 ^Ir. T. D. A. Cockerell — Descriptions and 



bent, and more distant from the trans verso-medial, in larrece 

 than in olivice. 



Hah. Mesilla Park, New Mexico, at flowers of Larrea, 

 May 16 {Cockerell) ; also taken by Mr. Viereck at Alamo- 

 gordo, New Mexico, at Larrea. 



Andrena i>yrrhacitay sp. n. 



? . — Length about 11| mm. 



Robust, black, with very abundant erect hair on head, 

 tliorax, and abdomen. Head broad, facial quadrangle very 

 much broader than long ; facial fove^ black, broad but short : 

 hair of clypeus, sides of face, and vertex black ; of front and 

 between antennte, and occiput, yellowish white or pale 

 ochreous ; of cheeks black, with more or less pale above and 

 below: antennas black, third joint much longer than 4 + 5, 

 flagellum faintly brownish beneath ; process of labrum 

 entire ; clypeus dull, with dense minute punctures and a 

 rather faint median ridge ; thorax dull and granular, with 

 abundant, long, erect, pale ochreous hair; lowest part of 

 pleura with black hair ; area of metathorax without rug» or 

 raised margin. Legs black, with mainly black hair, but it is 

 long and pale on anterior femora behind, and pale on inner 

 side of hind tibias ; teguloe piceous. Wings hyaline, nearly 

 clear, the apex a little dusky ; stigma and nervures dark 

 rufo-fuscous j second s.m. receiving first r. n. beyond the 

 middle; abdomen with only minute feeble punctures, not 

 banded, but covered with erect hair of a rather light ferrugi- 

 nous colour, whitish on first and fifth segments, black or 

 sooty at extreme apex ; second segment depressed about one 

 third ; basal part of venter with coarse black hair. 



At first sight this suggests A. Hitei, Ckll., but it has much 

 less brilliantly coloured hair, a broader, more oval abdomen, 

 and the sculpture of the clypeus is entirely different. It is a 

 very distinct and beautiful species. 



Bab. Salina, Boulder County, Colorado, 6550 ft. alt., at 

 flowers of Salix, April 14, 1907 {W. P. and T. D. A. 

 Cockerell). Another specimen, with the hair of the abdomen 

 less brightly coloured, was taken by Mr. G. Hite at Boulder, 

 Colo., March 25, 1907. 



Andrena mimetica Falli, subsp. n. 

 ? . — Differs from A. mimetica, Ckll. (which occurs in 

 New Mexico), thus : smaller, length about or just over 11 mm.; 

 third antennal joint shorter than 4 + 5; second and third 

 abdominal segments with white hair at base, conspicuous 

 when the abdomen is seen from the side. 



