258 H. C. FALL. 



STI€HTOPTYCHUS new genus. 



Form elongate-oval, convex, similar to Catorama, with which it 

 agrees in its oval form and tarsal structure, slightly compressed eyes, 

 dual system of punctuation and other respects except as follows : 

 The head is very deeply excavate anteriorly for the antennae; the 

 latter are 11-jointed ; joints 2-8 of very nearly equal width, the sec- 

 ond and third slightly elongate, fourth to eighth evidently transverse 

 and inwardly subserrate. Ninth and tent! triangular, longer than 

 wide; eleventh longer, oval ; ninth to eleventh subequal to all the 

 preceding. Scutellum transverse, sinuately pointed behind. Elytra 

 punctate striate. Met-episterna parallel, narrowly exposed. Middle 

 coxae distant, the mesosternum recessed beneath the metasternum, 

 which is produced in the form of a short, very strongly transverse 

 deflexed lobe similar (except in its deflection) to that of Dorcatoma. 

 Metasternum broadly longitudinally sulcate as in Dorcatoma, with 

 which genus it further agrees in its arcuate ventral segments and 

 non-sulcate front tibiae. 



A single species from our extreme southern border represents this 

 genus, which is in many respects intermediate between Catorama. 

 and Dorcatoma. It is very closely related structurally to Protheca, 

 from which the small differences given in the table would doubtfully 

 have served to separate it, but for the much larger size and very 

 different facies. 



1. S. agonus n. sp. — Elongate-oval, convex, black, antennae and tarsi pale; 

 pubescence fine, rather sparse, ochreo-cinereous. Eyes ratber small, somewbat 

 flattened, their vertical diameter about oue-tbird the width of the front. Head 

 finely punctulate with numerous evenly distributed coarser punctures. Pro- 

 thorax of the usual form in Catorama, except that the front as well as the hind 

 angles are rounded ; surface minutely closely punctulate with larger punctures 

 intermixed ; the latter rather sparse at the middle of the disk, but becoming 

 rapidly coarser and denser laterally where they are almost in mutual contact. 

 Elytra with regular rows of closely placed punctures, the interspaces sparsely 

 more finely punctured, and the whole surface closely very minutely punctulate. 

 Metasternum distinctly punctate, the punctures nearly evenly distributed, but 

 coarser and therefore somewhat closer anteriorly. Abdomen rather sparsely 

 punctate with the usual minute punctuation. Tibife evenly convex and punc- 

 tate externally. Length 3-3.5 mm. 



Texas (Brownsville). A small number of specimens collected by 

 Wickham, Schaeffer and Townsend. 



