AMERICAN COMPONENTS OF THE TUNTYRIIN^ 487 



rather sparse ; head large, elongate-oval, smoother and more shin- 

 ing than usual, the sides strongly converging and almost evenly 

 arcuate from the eyes to the neck ; prothorax very small, three- 

 fourths as wide as the head and two-thirds as long, elongate, 

 widest near apical third, where the sides are subprominently 

 rounded, thence converging and nearly straight to the base, the 

 truncate base and apex fringed as usual ; surface convex, feebly 

 impressed along the median line throughout, very tincly in the 

 centre, more broadlv toward apex and base ; neck two-fifths as 

 wide as the head ; elytra less elongate than in tenuis^ though fully 

 twice as long as wide and more than twice as wide as the pro- 

 thorax, evenly oval, sculptured nearly as in the two preceding, 

 the spicules of the ridges and serial interspaces similar but, at 

 apex, not quite so evidently squamiform and but little paler; ab- 

 domen smooth and polished, moderately coarsely, sparsely punc- 

 tate. Length 3.9 mm. ; width 0.72 mm. California (Palm 

 Springs) exiguus n. sp. 



6 — Form rather short, stout and convex, the anterior parts densely, 



rather roughly punctate, finely, somewhat sparsely squamulose and 

 blackish-brown in color, the hind body pale red-brown ; head 

 large, suboblong, widest at the antennal prominences, the sides 

 thence evidently converging and nearly straight to the basal angles, 

 which are evident and not very rounded, the base arcuately subtrun- 

 cate ; eyes well developed, widely divided, the upper lobe of 

 about 21, the lower of 5 coarse facets, the surface canaliculate 

 along the median line in less than basal half; prothorax only 

 slightly narrower but very much shorter than the head, not longer 

 than wide, widest near apical third, where the sides are evenly 

 rounded, thence strongly converging and sinuate to the base ; peri- 

 phery at ends and sides similarly and densely fimbriate with long 

 erect scales ; surface with two fine, straight and parallel ridges 

 from apex to base, separated by nearly a third of the width, each 

 of which has a dense erect fringe like that at the sides ; elytra 

 oval, not quite twice as long as wide, not quite twice as wide as 

 the prothorax, the parallel sides rather arcuate, the surface with 

 ridges and double series of coarse punctures as in the preceding 

 species, the close, erect and bristling fringe along each ridge pale 

 flavate in color, composed of narrow claviform scales, with their 

 apices bent posteriorly and their posterior edges throughout their 

 length apparently thin, transparent and membranous ; a few simi- 

 lar scales are also scattered along the flat intervals between the 

 rows of coarse punctures ; abdomen unusually coarsely, very 

 closely punctate and dull. Length 3.6-3.8 mm.; width 1.15 

 mm. Arizona (Tu9Son) fimbriatUS Csy. 



7 — Femora wholly devoid of denticle 8 



Femora with a small acute denticle beneath beyond the middle, except 



the posterior femora, which are not denticulate 13 



8 — Intervals between the rows of coarse punctures of the intercostal 



depressions flat and wholly devoid of punctures or squamules...9 



