Goleopferological Notices, VII. 535 



longer than the second, the next three eqtial; anterior tarsi not dilated. 

 Length 2.0 mm; width 0.8 mm. 



Central Illinois. Mr. Webster. 



The unique type has the sixth ventral segment large, nearly as 

 long as the four preceding and longer than the first ; judging by 

 this and the narrow head, with rapidly converging sides behind 

 the eyes, it is undoubtedly a male, but the femoral tooth is never- 

 theless probably common to both sexes ; the anterior tarsi are 

 only very feebly enlarged toward base. The species is allied 

 closely in general appearance to the others of this section, and 

 especially to longicollis. 



ACHOLEROPS n. gen. 



This genus is closely allied to Eumicrus, but differs constantly 

 in its narrower form of body, obsolete or very indistinct sub- 

 basal foveas of the pronotum, obsolete basal impression of the 

 eWtra, broader and less deeply constricted neck and complete ab- 

 sence of scutellum, the latter being minute, but exceedingly per- 

 sistent in all of the rather numerous species of Eumicrus. It also 

 differs in having the triangular glabrous plate adjoining the an- 

 terior coxae obsolete or very minute and of a different character, 

 the hind tarsi more elongate, with the basal joint as long as the 

 next two, and the anterior slender, but slightly affected sexually 

 and then only in the basal joint. The middle coxae are narrowly 

 separated by a feebly elevated and obtuse carina, the posterior 

 rather widely separated, the met-episterna narrower than in 

 Eumicrus, but delimited by the same very coarsely excavated 

 suture, and the hind trochanters, although undoubtedly elongate, 

 are less distinctly so than in Eumicrus and are more swollen 

 within. In other characters, including the general habitus of the 

 body, antennal structure, form of the front, palpi and pygidium, 

 the two genera are virtually similar, though the third palpal joint 

 is rather more fusiform and less conical, and onl}^ f to |^ longer 

 than the second in Acholerops. 



The known species of our fauna are as yet few in number, and 

 may be discriminated by the following general characters : — 



Hind tarsi very long and slender; elytra without trace of basal erosion; body 

 larger 1 ziiiunermauni 



Hind tarsi shorter; elytra each with a minute suberoded depression at the 

 middle of the basal margin; body very small 2 retrusa 



