1 76 MEMOIRS ON THE COLEOPTERA 



amply distinct from nebulosus by reason of the coarser punctures and 

 shorter, more decumbent and less evident pubescence, more elongate- 

 oval outline and several other characters. The type of longulus 

 I had included with specimens of nebulosus in my previous work on 

 the genus, but it is distinct by its black coloration, narrower out- 

 line, denser and finer sculpture and rather shorter antennae. 



Thrimolus Csy. 



The very minute species of this genus are allied somewhat to 

 Litargus but have different antennal structure, and the finely 

 beaded base of the pronotum is only feebly sinuato-truncate at the 

 scutellum and is not medially bisinuate as in that genus. The 

 following species was given the name minutus Csy., by Blatchley, 

 but closer observation of specimens kindly sent me by Mr. Dury, 

 shows that it is different; it may be described as follows: 



Thrimolus duryi n. sp. Minute, oblong-suboval, moderately convex, 

 broadly obtuse at apex, shining and pale brown in color throughout; 

 pubescence coarse, rather long, sparse and reclining and mingled with 

 other longer erect bristles on the elytra; head large, nearly four-fifths 

 as wide as the prothorax, very minutely, sparsely punctulate, the eyes 

 well developed, and basal; antennae as long as the head and prothorax, 

 very pale, with darker and relatively thick club, the first three joints 

 decreasing rapidly in length and thickness, third and fourth slender and 

 subequal, five to eight gradually increasing in breadth and in brevity, the 

 fifth as wide as long, obconical, the eighth very short and transverse, 

 not as wide as the club, the latter subparallel, with rather transverse 

 joints; prothorax short, more than twice as wide as long, the sides sub- 

 parallel, rounding anteriorly, the punctures asperulate, small and sparse; 

 scutellum large, semicircular, very feebly punctulate; elytra two-fifths 

 longer than wide, widest near basal third, where they are slightly wider 

 than the prothorax, the two bases exactly equal; sides feebly converging 

 behind, but with the apex rapidly and very broadly obtuse; punctures 

 without trace of serial arrangement, rather fine and distinctly separated, 

 strongly asperulate; tarsi slender, filiform, fimbriate beneath with short 

 hairs, the posterior distinctly shorter than the tibiae. Length 0.78-0.82 

 mm.; width 0.48 mm. Ohio (Cincinnati), Charles Dury. Two ex- 

 amples. 



In minutus the general outline of the body is very similar, though 

 not quite so broad and of smaller size, but the antennae are shorter 

 and joints 5-8 increase much more slowly in width, the eighth less 

 broad. The punctures throughout are less minute in duryi and 

 rather more numerous. The types of both species are females, so 



