36 GEO. H. HORN, M. J). 



HOL,OSTROPHU!!ii n. g. 



Under this name I have separated three species which differ as 

 follows, while possessing, otherwise, the characters of Eiistroi)hus : 



Eyes very widely separated on the front, scarcely eniarginate in 

 front and not prolonged over the insertion of the antennae. Last 

 joint of maxillary palpi oval, obliquely truncate (cylindrical in Eus- 

 trophus). Prosternum more widely separating the coxa?, prolonged 

 behind them and slightly broader at npex. Mesosternum pi'olonged 

 in an obtuse keel, but not mucronate at apex. Fourth joint of an- 

 tennae not shorter than the fifth. Elytra without stria? of punctures. 

 Middle and posterior tibiae without ridges on outer edge. 



The species here referred may be separated in the following 

 manner : 



Apex of prosternum distinctly margined at tip and sides. 



Surface very densely and finely punctured ; color uniformly brown ; basal im- 

 pression of thorax linear iiiipressicollis. 



Apex of prosternum not margined. 



Surface densely, but not very finely punctured ; color brown, elytra with two 

 wide yellow bands, broadly interrupted by the suture ; basal impression 

 of thorax linear biraseiatiis. 



Surface more coarsely, not densely jmuctured ; color brown, the elytni gradu- 

 ally luiler to base; basal impression of thorax very vague, somewhat 

 triangular discolor. 



H. iinprossifollis Lee. {Ensfrophns). Trans. Am. Ent. Soc. 1874, p. 69.— 

 Elongate-oval, depressed, distinctly narrowed posteriorly, brown, feebly shining, 

 sparsely clothed with short brown pubescence. Anteniise reddish-brown, the 

 last joint a little paler. Eyes entirely lateral, not extending above the insertion 

 of the antenniE. Thorax very finely and moderately densely punctured, the 

 basal impressions rather long, linear and .sharply defined. Elytra punctured 

 similar to the thorax, a faint trace of a sutural stria. Prosternum coarsely punc- 

 tured, the apex rounded and distinctly margined, the side pieces densely and 

 finely punctured. Metasternum at sides rather coarsely punctured. Abdomen 

 densely and very finely punctured. Length .20 inch ; 5 mm. 



In this species the antenme are rather more slender than the other 

 two, the outer joints being less transverse. The uniform color of 

 the body and the fine, dense ])unctuation will enable this species to 

 be at once known. 



Occurs in Nevada, Vancouver and Washington Territory. Three 

 specimens have been seen in the collections of Dr. LeConte and 

 myself 



H. bifasciatus Say [Eustrophus), Long's Exped. ii, 1824, p. 282; edit. Lee. 

 i, p. 186; qnadrimacHlatus Mels., Proc. Acad. 1846, p. 58. —Oval, distinctly nar- 

 rowed posteriorly, moderately convex, reddish-brown, elytra piceous, with two 

 broad yellow bands interrupted at the suture, surface moderately shining, clothed 



