128 THE ENTOMOLOGIST. 



NOTES ON AMEEICAN BEES. 



By T. D. A. Cockerell, 



Professor of Entomology, New Mexico Agricultural College. 



Nomia nevadensis, Cresson. — La Luz, N. M., July 27th, 1898. 

 (C. M. Barber.) 



a Nomia arizonensis, n. sp. — $ . In my table of Nomia ('Ento- 

 mologist,' February, 1898) this runs to N. cornpacta; but the 

 wings are very clear, with very dark broad contrasting hind 

 margins. It is surely a distinct species, by this character, and 

 the locality. Arizona. (C F. Baker, 2304.) 



Andrena chromotricha, n. sp. 



? . Length a little over 9 millim. ; breadth of abdomen 2| millim. 

 Belongs to the group with the mesothorax and, abdomen minutely tessellate, 

 not punctured ; the enclosure of metathorax triangular, granular, de- 

 fined only by a line, with only the extreme base very slightly wrinkled ; 

 the process of labrum broad and truncate, the truncation broadly sub- 

 marginate, the sides sloping ; the clypeus with a smooth median line, 

 its sides on each side of the line distinctly but not closely punctate, 

 its anterior margin with a pair of long and strong yellowish bristles 

 projecting downwards ; the front beneath the ocelli strongly striate ; 

 the tegulaa very dark brown ; the wings with the apical margin smoky ; 

 the abdomen with continuous but thin pale hair-bands ; the apical 

 fimbria sooty. 



This species is closely allied to A. apacheorum, the description of 

 which (Entom. 1897, p. 300) applies to it with these exceptions : it is 

 a little smaller, especially in the abdomen ; the pubescence of the meso- 

 thorax and scutelhun is a lively reddish orange ; the hair of the abdomi- 

 nal bands is hardly so long ; the impunctate line on the clypeus is 

 well-defined ; the vertex is a little narrower ; the 'pubescence of the tarsi 

 is entirely very pale yellowish, like that of the tibiae ; the frontal striation 

 is stronger. The first segment of the flagellum is about or hardly 

 twice the length of the second, whereas in apacheorum it is a little over 

 twice the length. The nervures are very dark brown, the stigma some- 

 what lighter. 



Hab. Forks of Euidoso Creek, New Mexico, July 30th, 1898. 

 (C. M. Barber.) It is just possible that this is an extreme 

 variety of apacheorum, but its characters seem specific. The 

 two conspicuous clypeal bristles also occur in apacheorum, 

 Jimbriata (americana), electrica, macgillivrayi (rather small), 

 vicina, &c. 



Halictus lerouxii, Lep. — 2 . Colorado. (Gillette, 2441.) 

 H. parallelus of Ashmead's Colorado list is doubtless the same. 



Halictus ligatus race townsendi (Ckll.). — To my surprise, Mr. 

 C. M. Barber took two females of this in Mesilla, New Mexico, 

 along with many ordinary ligatus. The insect was described (as 

 H. townsendi) from Tropical Mexico. 



