364 PROCEEDINGS OF THE NATIONAL MUSEUM vor.. Ss 



Genus EXETASTES Gravenhorst 



EXETASTES RUFIPES Crcsson 



Exeta-rtes abdominnTis var. a Cresson, Proc. Ent. Soc. Philndelphia. vol. 4, 



p. 277, 1865. 

 Exetastes rnfipes Ckesson, Proc. Ent. Soc. Philadelphia, vol. 4. p. 277 (note), 



1865. 

 Exetastes purpureus Cushman, Proc. U. S. Nat. Mu.s., vol. 84, p. 285, 1!»37. 



New synonymy. 



Additional material received since the publication of my levisioii 

 of Exetastes shows purpureus to be merely a variation of rufipes. 

 This material consists of six females and two males submitted for 

 identification by George R. Ferguson, Oregon State Agricultural 

 College, Corvaliis, Oreg. They were collected July 20 and 26, 1937, 

 at 7,000 and 8,500 feet on Steens Mountain, Oreg., by Bolinger and 

 Jewett. 



The series includes specimens intermediate in color of legs be- 

 tween the black of purpureus and the red of ruflpes as well as speci- 

 mens typical of each. 



EXETASTES PILOSUS, new species 



In my key to the North American species of Exetasten ^ this species 

 will run to couplet 4, where it agrees with the first alternate in the 

 sculpture and pubescence of the head and thorax but disagrees with 

 the other three characters. The color pattern of the head and thorax 

 is like that of lasms, but the abdomen and legs are ferruginous. Be- 

 yond couplet 4 it runs, on most of the characters, to hituminosus 

 Cuslunan, with which it agrees rather remarkably in the structure 

 of the head and the form of the abdomen, but differs in the exceed- 

 inglj^ slender antennae and legs as well as conspicuously in color. 



Female. — Length 11 mm., antenna 11 mm. 



Head and thorax mat, with very fine dense punctation and dense 

 silvery pubescence; temples strongly receding, nearly flat; occipital 

 carina sinuate below and joining hypostomal carina; ocellocular and 

 postocellar lines about equal and each much longer than diameter of 

 an ocellus; face twice as broad as long, as broad as length of the 

 parallel eyes, nearly flat, with a small median prominence; clypeus 

 slightly less than twice as broad as long, strongly rounded at apex, 

 transversely divided at basal third, apical part shining, finely 

 shagreened; malar space two-thirds as long as basal width of 

 mandible; mandible nearly twice as long as broad at base, teeth 

 equal; antenna 73-75-jointed, extremely slender filiform, basal joint 

 of flagellum fully six times as long as thick at apex but hardly twice 

 as long as second, subapical joints moniliform. 



sproc. U. S. Nat. Mus., vol. 84, p. 249. 1937. 



