88 GEO. H. HORN, M. D. 



TRICIIOPSEXIUS n. g. 



Antenn?e normally inserted, first two joints as in ITi/pon/phis ; joints 

 three to ten not seen. Palpi not present. Mesosternum short in front 

 of coxae and obtusely elevated, deeply depressed between the coxas 

 and very narrow so that the coxse are contiguous without the cavities 

 being confluent. Posterior coxae connate with the ruetasternum, the 

 articular plates connate at middle and arising from the face of the 

 metasternum. Elytra not prolonged beyond the body, epipleurae 

 narrow, horizontal. Scutellum visible. Tibiae distinctly spinulose. 

 Hind trochanters broadly oval. Hind tarsi four-jointed, anterior 

 and middle absent in the specimen. Abdomen not margined. Form 

 oblong, depressed, surface glabrous, elytra with three transverse rows 

 of setae. 



That this genus belongs to the present tribe there can be no doubt 

 from the insertion of the antennae, but it is equally certain that it is 

 a rather anomalous memter. The contiguity of the middle coxae, the 

 absolute fusion of the metasternum and the posterior coxae and the 

 articular plates arising apparently from each side of the middle of the 

 metasternum and even extending forward close to the middle coxae are 

 certainly very remarkable characters. 



The entire absence of antennae (except the two basal joints), de- 

 prives me of the means of approximating this genus to its allies with 

 absolute certainty. The four-jointed posterior tarsi cause me to place 

 it provisionally near Hi/pocyptns, with the hope that at some future 

 time perfect specimens may enable me to speak with greater certainty. 

 The curious specific character found in the arrangement of the erect 

 hairs on the elytra will enable the insect to be known whenever re- 

 found. 



T. depressuii^. Lee. — Testaceous, very shining. Head and thorax smooth, 

 shining, absolutely inipunctured. Thorax not twice as wide as long, sub-de- 

 pressed, sides slightly arcuate and a little narrower in front, base truncate, hind 

 angles rectangular. Elytra each quadrangular with equal length and width, 

 sub-depressed, smooth, glabrous, and with three transverse rows of erect setse 

 numbering four or five in each row. Abdomen conical, shining, sparsely setu- 

 lese. Body beneath shining, abdomen sparsely setulose. Length .05 inch; 

 1.25 mm. (figs. 1 and 2). 



The legs of this insect are relatively stouter than in any genus of 

 the tribe. From the extremity of the abdomen there project two 

 rather stout corneous processes. The abdomen is however so retracted 

 that I am unable to say whether these are sexual or not. 



One injured specimen, Georgia. 



