i8o MEMOIRS ON THE COLEOPTERA 



convex, feebly externally, strongly suturally, the third with a single 

 puncture behind apical third, the apical series on 3-5-7 evident but 

 very short; marginal series interrupted medially; hind tarsi un- 

 usually short, the basal joint barely longer than the next two com- 

 bined. Length (c? 9 ) 9.0-9.7 mm.; width 3.3-3.8 mm. Missouri 

 (St. Louis). Four examples. [Gynandrotarsus harpaloides Laf.]. 



harpaloides Laf. 



The species described by La Ferte as harpaloides is singularly 

 aberrant, and were it not for the fact that the swollen basal joint 

 of the anterior female tarsi is exactly reproduced in the more normal 

 texanus and opaculus, I should be disposed to give Gynandrotarsus 

 generic standing. Carbonarius is also a remarkably distinct species, 

 for not only are there two distinct and constant post-medial punc- 

 tures on each elytron a fact overlooked by Horn, but merely a 

 particular stage of the anterior prolongation of the apical series on 

 the third interval noticeable in all the species of the rusticus sec- 

 tion, but the prosternum is punctulate and pubescent medially, 

 as well as the median part of the abdominal base. The epistoma 

 has two punctures at each angle instead of the usual one, buc, 

 although perhaps not so inconstant a character as in Harpalus 

 viridiceneus , it is at least unreliable here also, for in several cases 

 at hand there are three punctures instead of two. The species of 

 the rusticus section, as defined above, which were suppressed by 

 Horn, seem to be sharply limited and amply worthy of adoption. 



Anisodactylus Dej. 

 Aplocentrus Lee. 



The first species described under this name by Dejean, Carabus 

 heros Fabr., probably differs generically from binotatus, which I 

 assume to be the type of the genus. The peculiar coloration of 

 the body and disposition of the discal punctures of the elytra in 

 heros, indicate that it should not be associated closely with binotatus, 

 the latter being perfectly congeneric in every way with all of our 

 numerous black or feebly metallic species, and binotatus Fabr., 

 ought therefore, in view of numerical preponderance, to be con- 

 sidered the generic type; the American species outnumber the 

 palaearctic three or four to one. 



The genus Anisodactylus is very well defined in habitus and in 

 several structural features. The slender hind tarsi, with elongate 



