78 Mr. T. D. A. Cockerell on Bees of the 



XI. — The Bees of the Genus Andrena. found in New 

 Mexico. By T. D. A. Cockerell. 



1. Species ivith the abdomen partly or wliolhj rufous. 



a. Pubescence black. 



Andrena 'prima^ Casad, sp. n., ? . 



" Head, thorax, legs, and last abdominal segment black ; 

 segments 1 to 4 red ; pubescence black ; head as broad as 

 thorax ; clypeus, face, occiput, and cheeks sparsely hairy, 

 clypeus and occiput punctate ; face between antennai striate 

 longitudinally ; antennae black ; mesothorax, scutellum, and 

 postscutellum coarsely punctured, clothed with a few scattered 

 black hairs; metathorax fringed, and pleura sparsely clothed, 

 with black Jiairs ; wings smoky from basal nervure to apex ; 

 tegulaj black, shiny ; legs black, with black pubescence, that 

 on anterior legs sparsely mixed with reddish-gold hairs ; 

 abdominal segments 1 to 4 reddish, bare, punctate and shiny, 

 last segment black, fringed with black hairs ; venter sparsely 

 liairy. Length about 10 millim." [Jessie E. Casad.) 



Hah. Little Mountain, Mesilla Valley, N. M., April 1, 

 1895, on Krynitzkia^ believed to be K. Jamesii [Casad, 151). 

 I took one on flowers of plum on the College Farm, March 30, 

 1896; this has the two last abdominal segments black, 

 leaving only three red, but it is clearly the same species. 

 The enclosure of the metathorax is wrinkled. This differs 

 entirely from any described North-American species. The 

 Mexican A. modesta, Sm,, may resemble it somewhat from 

 the description, but it is evidently a different thing. 



b. Pubescence gvey or fulvous. 



a. Wings clear or only faintly clouded. 



Andrena sphecodina, Casad & CklL, sp. n. 



" Black and red, pubescence ashy; head about as broad as 

 thorax ; clypeus, face, occiput, and cheeks clothed with pale 

 hairs, clypeus punctured ; face between antennte and ocelli 

 striated longitudinally ; hair on pleura long ; wings dusky 

 hyaline, nervures brown, third submarginal cell very long, 

 narrowed more than half toward marginal; tegulse piceous, 

 shiny ; legs clothed with pale hairs, trochanter furnished with 

 a tuit of long silky white hair, femora and basal portion of 

 tibige black, tibife and tarsi red ; first and second abdominal 



