17 



on the hinder half, but rather less strongly than in porosus; with the first inter- 

 space on the declivity more prominent than the others, the third not more so 

 than the second, so that the declivity appears from above distinctly more 

 narrowly rounded than in porosus; similarly clothed with minute pubescence 

 becoming scale-like behind and forming a crust on the declivity. 



The type is from Colorado. This species is represented in our collection 

 also from Nevada, New Mexico, and British Columbia. 



Hylurgops knausi, n. sp. 



An elongate species allied to porosus but differing in the small, regular, 

 pronotal punctation, small strial punctures and wide flat, finely, densely granulate 

 interspaces. Length, 5mm.; width, l-6mm. 



The head is as in porosus, but more finely, very densely punctured with the 

 punctures rather coarse in front, and sparse on the middle line immediately 

 behind the acute median epistomal carina. 



The pronotum is slightly longer than wide, a little narrower than the elytra, 

 with the sides moderately converging cephalad on the caudal half, then more 

 strongly narrowed to the broadly arcuate front margin; moderately bisinuate 

 behind ; the caudal transverse carina acute only near the sides ; the punctuation 

 small, regular, dense, granulate only at the side margins; the median line finely 

 carinate. 



The elytra have the base nearly straight; about twice as long as wide; the 

 sides nearly straight and parallel to well behind the middle, then rounded to 

 the narrowly rounded apex; the declivity steep; the strise impressed moderately 

 upon the disc and declivity, the sutural strise deeper at the base; the lateral 

 strise faintly impressed in front, except the last two, which are rather deeply 

 impressed; the strial punctures small, hardly decreasing in size on the sides; 

 the interspaces moderately convex on the disc behind and more strongly so 

 upon the declivity, flattened at the base and on the sides, somewhat wider than 

 the strise on the disc, much wider on the sides; finely, very densely, strongly 

 granulate-punctate, rather feebly uniseriately asperate and hairy on the declivity 

 only; the pubescence from the numerous fine punctures very minute, almost 

 obsolete on the disc, minute and somewhat scale-like on the declivity. 



A series that probably represents the other sex of this species has the 

 pronotum somewhat less densely punctured and less granulate, with the declivity 

 distinctly more feebly sculptured, and with the uniseriate hairs very short and 

 inconspicuous. 



Cloudcroft, N.M., 9,000 ft., W. Knaus. 



Hylurgops grandicollis, n. sp. 



An aberrant Hylurgops with a very wide depressed prothorax, as wide as 

 the elytra, subacutely margined at the side; abundantly hairy throughout. 

 Length, 5 2mm. ; width, 1 9mm. 



The head has the front rather closely subgranulately punctured with small 

 and large scattered punctures intermixed, with rather numerous long erect 

 hairs; the transverse arcuate impression deep; the epistomal lateral impressions 

 deep, separated by a short, acute, median carina; the epistomal lobe short, 

 wide, and deeply concave from above as usual; the antennal scrobes very dee"p 

 and acutely margined above; the club shorter than usual with the first segment 

 comprising rather more than one-half the mass. 



The pronotum is very large, slightly longer than wide, with the sides sub- 

 parallel,- faintly arcuate for over three-fourths of the length, then strongly 

 narrowed to the narrow but broadly rounded front border, which is strongly 

 recurved and finely margined; the hind angles rounded; the hind margin very 



