66 MEMOIRS ON THE COLEOPTERA. 



vestiture as in the preceding though both are finer on the head and pro- 

 notum; head a little larger, more parallel and less rounded at the sides, 

 wider than long, the large eyes rather convex, at distinctly less than their 

 own length from the base; antennae relatively less short, slender, pale 

 basally, gradually very moderately incrassate, compact and infuscate 

 distally, the second and third joints elongate, equal, fourth slightly, the 

 fifth distinctly, shorter than wide, the outer joints scarcely one-half 

 wider than long, the last somewhat longer than the two preceding; 

 prothorax very convex, similar in form to the preceding; elytra also well 

 developed and similarly fully as wide as the prothorax or somewhat wider, 

 with the parallel sides slightly arcuate, much longer than the prothorax, 

 the oblique external part of the apices straight; abdomen about as wide 

 as the elytra, parallel, arcuately and moderately narrowing apically, 

 the fifth tergite three-fourths as wide as the base, subequal in length to 

 the fourth; margins not quite so thick as in pallidus. Length 1.65 mm.; 

 width 0.55 mm. Pennsylvania (near Philadelphia). 



Allied to the preceding but somewhat smaller, distinctly narrower, 

 the abdomen differently colored, the punctures and hairs of the 

 head and pronotum finer, the antennae of different structure, 

 the head larger and more parallel and the abdomen less narrowed 

 at apex. 



Tinotus binarius n. sp. Minute and still more slender, not quite so 

 convex and subparallel, somewhat shining, pale red-brown in color, 

 the head darker and the legs paler, the fourth tergite with a small and 

 very faint median cloud; sculpture and vestiture nearly as in pallidus; 

 head slightly wider than long, subparallel, the eyes large and rather 

 convex, at less than their own length from the base; antennae short, 

 gradually strongly incrassate, compact and blackish distally, slender and 

 pale basally, the third joint a little shorter and more slender than the 

 second, the fourth not quite as long as wide, the outer joints not quite 

 twice as wide as long, the last ovoidal, obtuse, longer than the two pre- 

 ceding; prothorax three-fourths wider than long, subparallel, the sides 

 strongly arcuate, more converging apically, the base strongly rounded, 

 the surface evenly convex; elytra short and, as usual in this group, 

 somewhat wider than the prothorax, the suture not quite so long as the 

 latter and much shorter than the elytral flanks; abdomen almost as wide 

 as the elytra, subparallel basally, narrowing apically, the side margins 

 unusually thin. Length 1.2 mm.; width 0.38 mm. Arizona (Tucson). 



This species can be known readily from either of the preceding 

 by its much smaller size and narrower, more parallel form, also by 

 numerous details of structure, such as the less transverse prothorax 

 with more rounded base, the much shorter elytra and the finer 

 abdominal margins. I could find only one example. 



