350 BULLETIN 63, UNITED STATES NATIONAL MUSEUM.- 



oblong-oval as in the latter species; there is also much less difference 

 in general form in the sexes than is observed in other si)ecies. 



A single female taken at Port Harford evidently belongs here ; the 

 elytra are broader at base and the humeri more obtusely rounded. 



Hornil is more depressed than convex and the antenna^ longer, the 

 abdomen is not strongly sculptured nor the pronotum strongly con- 

 stricted at base. 



In parricollls the pronotum is broader, the abdomen never as 

 strongly sculptured, although in producta it is at times nearly so, 

 but here the elytra are distinctly flattened and the humeri promi- 

 nent. 



The strongly convex pronotum and elytra of neotoma' are A^ery 

 striking characteristics. The abdomen is rather oblique in the 

 female, an unusual character for that sex. 



General ohser rations. — -The mentum is rather small, usually para- 

 bolically rounded, at times subtriangular; surface rather densely 

 punctate, scarcely convex or foveate and not noticeably setose. 



The prosternum is very densely sculptured and scabrous, mocler- 

 atel}^ prominent ventrally with the coxa\ grooved along the middle, 

 subhorizontal, compressed behind and quite vertically truncate, angle 

 mucroid and more or less deflexed. 



The mesosternum is rather obliquely and arcuately declivous and 

 more or less deeply concave. 



The metasternum laterally between the coxa^ is as long as the 

 width of a mesotibia at middle. 



The abdominal process is quadrate (male) or slightly transverse 

 (female) and a fifth (male) or a third (female) of its width wider 

 than the metasternal salient. 



In the male the second abdominal segment is equal in length to 

 that of the process and twice as long as the fourth; the third is 

 equal to the post-coxal part of the first. 



In the female the post-coxal part of the first segment is equal in 

 length to the process; the second about a half longer than the third 

 and a fourth longer than the fourth segment. 



The tarsi are moderate in length and rather stout. 

 The relative len. 

 Tarsal formula 



The relative lengths of the tarsi were constant in the series studied. 



Pro. Meso. Meta. Metatibia. 

 INIiile.— 2i 2% 3 5 



Female.— 2i 2S 3 5 



ELEODES HORNII. new species. 



Oval to ovate, about twice as long as wide, more or less shining, 

 subglabrous; elytra feebly submuricately punctate laterally, and 

 gradually widening from the base to middle; humeri obsolete. 



