AMERICAN COMPONENTS OF THE TENTYRIINyE 445 



the arid regions of the great basin of Utah and perhaps eastern 

 Nevada ; the three species may be outlined as follows : — 



Base of the prothorax slightly wider than the apex. Form robust, 

 piceous-black, moderately shining, sparsely clothed with moder- 

 ately long yellowish hairs ; head coarsely, densely and substri- 

 gosely punctured, the epistomal lobe rounded in front; prothorax 

 twice as wide as long, the apical angles acute and very prominent 

 anteriorly, the base slightly arcuate at the middle, feebly sinuate 

 laterally, the hind angles right, the sides very feebly arcuate ; sur- 

 face very convex, with an ante-basal transverse impression, 

 coarsely, deeply and rather densely punctured, becoming some- 

 what strigosely so laterally ; elytra broadly oval, very convex, 

 moderately coarsely but not densely punctured, the punctures with 

 faint tendency to serial arrangement ; prothorax beneath very 

 coarsely, deeply and rather densely punctured, the mesosternum 

 less coarsely so, the metasternum with very large deep punctures; 

 abdomen moderately densely punctured; outer margin of the an- 

 terior tibiae slightly spinulose. Length 5.5 mm. Utah. \=Stibia 

 hispidula Horn] hispidula Horn 



Base of the prothorax slightly narrower than the apex ; erect vestiture 

 very long 2 



2 — Body moderately stout, very convex, somewhat piceous-black, the 

 legs and antennae more rufous, strongly shining, sparsely clothed 

 with very long sparse fulvous hairs ; head moderate, wider than 

 long, much narrower than the prothorax; coarsely but not very 

 densely punctate, the punctures elongate and somewhat longitudi- 

 nally coalescent ; epistoma strongly angulate ; prothorax not quite 

 twice as wide as long, widest somewhat before the middle, the 

 sides subparallel and feebly, subevenly arcuate, sinuate at the 

 acute and prominent basal angles and feebly subsinuate toward 

 the anteriorly produced and acute apical angles, the apex between 

 the angles transverselv truncate, the base very broadly, feebly 

 lobed, without beaded edge, the surface very convex, strongly 

 and transversely impressed before the basal lobe, coarsely, deeply 

 and closely punctured, the punctures elongate and irregularly 

 longitudinally subconfluent, coarser and more anastomosing 

 * toward the sides; elytra oblong-oval, moderately inflated, very 

 convex, a fourth longer than wide, between three and four times as 

 long as the prothorax and two-fifths wider at the middle, coarsely, 

 deeply, not very closely and confusedly punctured throughout, 

 rather less coarsely so toward tip ; abdomen coarsely, deeply and 

 closely but not confluently punctured throughout. Male with a 

 moderate circular pubescent fovea at the centre of the first ventral 

 segment. Length 4.8-5.2 mm.; width 2.3-2.6 mm. (cJ* and 

 9). Utah (Marysvale), — H. F. Wickham viUosa n. sp. 



Body very stout and convex, oblong-oval, deep black, with dark 

 rufous legs and antennie, highly polished, the very long and sparse 



