Coleoj)te7'oIogical Notices. 189 



to their own width, the sides of the interval straight and feebly convergent 

 anteriorly, abruptly terminating at a point just behind the scutellum, where it 

 is about one-half as wide as at the apex ; surface coarsely and strongly reticu- 

 late, scabrous on the vertical flanks, sparsely clothed with exceedingly short 

 erect set£e, and each with two long setse near the inner margin, one near the 

 base and another behind the middle ; flanks perfectly devoid of true epipleurae. 

 Episterna large, triangular, very wide beliind, but covered by the elytra before 

 attaining tlie humeri. (?o.r<c with the inner portions large, porrect, contigu- 

 ous, longer than wide, truncate at apex, with the surface broadly convex ; 

 trochanters large, simple ; femora irregular, the upper edge broadly angulate 

 just beyond the middle, the edge thence broadly incurvate in circular segment 

 to the point of attachment ; tibiae sparsely setose within, tlie spinose setae of 

 the two external rows stronger. Hind wings wanting. 



Abdomen with six segments, widely inflated, in the female three times as 

 wide as the elytra, witli the sides strongly arcuate, in the male very sliglitly 

 narrower, with the sides slightly straighter in the middle ; integuments in 

 great part chitinous, the white membranous portions but slightly exposed ; 

 upper surface feebly cdnvex, each segment above and beneath with two trans- 

 verse rows of setse ; lateral border deep and strongly reflexed ; lower surface 

 very convex, the setse longer. 



Legs rather long and slender. Tibia parallel, truncate, without terminal 

 spurs. Tarsi 5-jointed, rather long, slightly compressed ; first joint as long 

 as the entire remainder — sliglitly shorter in the anterior ; — fourth anchylosed 

 to the fifth. * 



Length 2.8 mm. 



Colombia (Panama). 



The above description is rather comprehensive, and includes 

 generic as well as specific characters in order that the numerous 

 differential characters distinguishing it from insolens may be made 

 more evident. The differences reside mainl}^ in the structure of the 

 elytra, front, convexity and prominences of the eyes, and irregu- 

 larities of the trochanters and femora; in iiisolens the elytra are 

 absolutely connate, and soldei'ed so completely together that the 

 suture is only indicated by a very feebly impressed line, — as great 

 a divergence from the corresponding structure in Jissipennis as 

 could well be imagined. In both, the maxillary palpi are exceed- 

 ingly irregular, but in the present species they differ greatly from 

 those of insolens. The fact that the tarsi, antennae and general 

 habitus are similar or parallel to those oi insolens, seems to indicate 

 that they should not be generically separated, but the great and 

 radical differences show at the same time that the genus is probably 

 one of great age in a geological sense. 



In the male, the sixth abdominal segment is evenly emarginate 



