164 MEMOIRS ON THE COLEOPTERA 



fifths longer than the fourth; prothorax inflated more anteriorly, 

 widest near apical two-fifths, not a fifth longer than wide, the sides 

 more strongly rounded, the converging basal parts, base and angles 

 nearly similar; base relatively narrower, four-sevenths the maximum 

 width, fully as wide as the apex, which is extremely feebly sinuate 

 between the obtuse but rather sharply marked and scarcely at all 

 rounded angles; surface nearly as in the preceding, the side margins 

 not quite so strongly elevated and less diaphanously rufescent; elytra 

 similar but not so elongate and more evidently widest a little behind 

 the middle, not four-fifths longer than wide, the apices similar but not 

 so produced or so finely acuminate, the impressed striae a little less 

 coarsely and more irregularly punctured, the intervals convex, 

 smooth, the setigerous punctures similarly difficult to trace but 

 apparently three in number; side margins strongly reflexed and 

 similarly thin and rufo-diaphanous; legs even more slender; two 

 basal joints of the anterior tarsi with two fine sharp grooves separated 

 by the broadly convex upper surface, the claws moderately long. 

 Length (9) 11.3 mm.; width 3.8 mm. Arizona (San Francisco 

 Mts.), F. H. Snow sublustris n. sp. 



5 Base of the prothorax very narrow, barely half the maximum width. 

 Body rather ventricose, feebly convex, very shining throughout, 

 the elytra with scarcely perceptible alutaceous lustre, dark though 

 bright testaceous, the elytra more obscure; head elongate, three- 

 fourths as wide as the prothorax, with rather narrow and abruptly 

 formed neck, the eyes moderate but prominent; antennae nearly 

 half as long as the body, slender, the third joint about a fourth 

 longer than the fourth, both much elongated; prothorax only about 

 a sixth longer than wide, rather inflated, widest near anterior third, 

 the sides rounded, gradually very converging behind the middle, 

 becoming very broadly and scarcely evidently sinuate to the basal 

 angles, which are right, very sharp and abruptly prominent; base 

 broadly sinuate, becoming arcuate at the sides, barely two-thirds 

 as wide as the apex, which is broadly, distinctly sinuate between the 

 broadly and obtusely rounded angles; surface distinctly convex, 

 broadly, feebly concave toward the sides, more deeply basally, 

 the edges strongly reflexed and thin, the median stria fine but strong; 

 elytra fully three-fourths longer than wide, regularly oval, four- 

 fifths wider than the prothorax. rather obtusely oblique and feebly 

 sinuate at apex, the tips obtusely angulate; striae fine, feeble, very 

 obsoletely and irregularly sculptured, the scutellar almost effaced, 

 the fovea however strong; intervals just visibly convex, the third 

 with four or five punctures; side margins very strongly reflexed and 

 rufo-diaphanous; legs long and slender, the hind tarsi almost as 

 long as the tibiae; basal joint of the anterior with two fine approxi- 

 mate dorsal grooves, meeting at base, subobsolete on the following 

 joints; claws long, slender, arcuate. Length (9) H-7 mm.; width 

 4.0 mm. New Mexico (Cloudcroft, Sacramento Mts.), Warren 

 Knaus dissecta Lee. 



Base of the prothorax relatively less narrowed and more or less evidently 

 exceeding one-half the maximum width 6 



