160 MEMOIRS ON THE COLEOPTERA 



longer, fifth fully one-half longer than the fourth; legs rather short. 

 Length 1.2 mm.; width 0.22 mm. Rhode Island (Boston Neck). 



May be identified by its very small size, slender parallel form and 

 cephalic and abdominal structure. 



Asthenesita Csy. 



The general habitus of this genus allies it also to the Sipalia 

 series and renewed study seems to indicate a 5-jointed middle tarsus; 

 the tarsal joints are extremely difficult to count in these very minute 

 forms, unless mounted in Canada balsam. The intermediate 

 coxae are distinctly separated, the mesosternal process moderately 

 acute and scarcely extending to their middle point, the meta- 

 sternal projection unusually long, flat, acuminate, acutely defined 

 and extending almost to the middle of the coxae, where it is sep- 

 arated from the process by a very short but rather deep interval. 

 The hypomera are as in Sipalia, the eyes rather small and there 

 is a vestige of extremely fine though apparently subentire infra- 

 lateral cephalic carinae. The antennae are unusually long and 

 differ from those of any other ally of Sipalia in the very long second 

 joint, which much exceeds the first and still more greatly the third, 

 the tenth much less than twice as wide as long and a little longer 

 than the ninth. The type is Asthenesita pollens, from southern 

 Florida. 



Gaenima n. gen. 



Body slender, linear, only moderately convex, the eyes well 

 developed, the elytra large, with truncate apices but with the flanks 

 extending posteriorly slightly further than the median parts, the 

 fourth tergite largest, one to three and five equal in length, the first 

 three each with a rather deep transverse basal concavity. Infra- 

 lateral cephalic carinae wholly wanting, the hypomera flat, feebly in- 

 flexed and wholly visible from the sides, the middle coxae evidently 

 separated, the metasternal projection rather long, its subacute 

 and well defined tip only slightly distant from the mesosternal 

 process, the tarsi rather short. 



The type of this genus, described below, gives rise to some un- 

 certainty regarding its true affinities. The prothorax has somewhat 

 the habitus of a Phytosid, and, at first, the middle tarsi seemed 

 to be 4-jointed, but the abdomen has a Sipaliid aspect and closer 



