418 Trains. Acad. Sci. of St. Louis. 



very feeble anteriorly, in this character leading onward to 

 the next genus, where the side margin differs from that of 

 any of the preceding genera in becoming wholly obliterated 

 anteriorly. 



Leptolinus Kr. 



This genus differs greatly from any of those which precede 

 in having the anterior tarsi very strongly dilated and clothed 

 beneath with a dense whitish pubescence, and it may be dis- 

 tinguished also by the density of the sculpture, particularly 

 of the head, where even the polished impunctate median area 

 of the other genera disappears ; the abdomen is rendered 

 alutaceous by the close-set minute punctulation. The pro- 

 sternum is long in front of the coxae as in Leiolinus and is not 

 carinate, though feebly tumid at the middle posteriorly, and 

 is somewhat narrowed by the hypomera anteriorly reminding 

 us of Lithocharodes . The female differs but little from the 

 male in general appearance, though usually rather smaller and 

 with the elytra relatively somewhat more elongate, but the 

 third antennal joint is slightly shorter than the second and 

 about as long as the next two combined and the sixth ventral 

 is rather strongly but evenly parabolic at tip ; in the male that 

 segment is transversely truncate, and, as usual in most of the 

 preceding genera, the male is much more abundant than the 

 female. The very narrow interstices between the punctures of 

 the under surface of the head are rendered somewhat dull by 

 a very minute reticulation, which, on the upper surface as 

 well as on the pronotum, assumes the form of very fine and 

 obsolescent wavy longitudinal strigilation ; the abdomen is 

 minutehs closely and more strongly strigilate in wavy lines 

 which have the usual transverse direction. Our single species 

 may be described as follows : — 



Form subparallelj only moderately convex, black, the abdomen piceous 

 along the side margins; elytra bright red, black along the basal margin 

 throughout the width; legs very pale, the antennae only slightly less 

 pale, rufous throughout; head large, oblong, much elongated behind 

 the antennae, the sides parallel and very slightly arcuate, the surface 

 dull and very strongly, densely punctate, the punctures elongate and 

 somewhat interlacing above, almost equally dense but more even be- 



