hungerford: aquatic hemiptera. 115 



gradually becoming wider towards the tip, at which point it is a little 

 triangular and rounded; the corium subtriangular and about one-half as 

 long as the membrane, with three stout longitudinal veins, of which the 

 costal is more bristly towards the base; the membrane has a pale longi- 

 tudinal suture throughout, \\ith a thick vein on the middle which does not 

 quite reach the end of the loop that is formed by the two veins which run 

 parallel to the margins and which converge on the tip; no transverse 

 veins as in Brachymetra. In some specimens the acute tip of the scu- 

 tellum projects from between the metanotal plates, in others it is atro- 

 phied. In two specimens the basal joint of tarsi was present on one 

 side, and not on the other." — Uhler. 



Trepobates pictus H. S. 



Herriek Scharffer. Wanz. Ms.. Till. p. Ill: Uhler. Stand. Xat. Hist.. II. p. 270. 



"It is of a yellow color, with a black stripe on the head, which is either 

 interrupted or runs down to near the base of the rostrum; the rostrum is 

 plceous, interrupted by yellow near the base; on the prothorax two black 

 lines along the middle spread apart behind; a similar line occupies each 

 side, and is continued unevenly back to the end of the mesothorax; on the 

 latter a line runs down the middle with a dot on each side; and exterior 

 to these the lateral, wider lines run backward and curve inwardly until 

 nearly meeting on the middle of the posterior margin. Most of the 

 sutures on the abdomen, pectus, and flanks are black, and black lines ex- 

 tend along the sides of all the legs. Many varieties occur in which the 

 black color invades more or less of the surface, particularly of the upper 

 side, so that some appear black, marked with a few yellow stripes and 

 spots. 



"In the unwinged state, although capable of laying eggs and con- 

 tinuing the species, these insects fail to acquire their full plan of struc- 

 ture, and there is consequently an arrest in the formation of the thorax. 

 In this complete form the wing covers are elongate-obvate, smoke-bro^sTi ; 

 the coriaceous part rather less than half as long as the membrane, nar- 

 rowly tapering towards the base, furnished with three stout veins, the 

 outer and inner of which run nearly parallel to the margin, while the 

 third extends along the middle, and ends in a small cell; the boundary 

 between the two portions is made by a coarse transverse vein, and the 

 base of the costal margin is quite pubescent. The membrane has the 

 outer and inner submarginal veins of the corium continued through it to 

 the tip, where the two unite in a loop; the middle one is continued to the 

 very tip, in the form of a suture, and is paler than the adjoining surface. 

 The wings are also brown, opaque, much shorter and narrower, than the 

 wing-covers, with three long veins reaching to the tip, and a basal one 

 * curving towards the hind margin. Here, also, the pronotum occupies 

 the whole width of the dorsum, lacks the suture which divides it from 

 the mesothorax, and the two united are free, forming a cap over the other 

 segments of the mesothorax, and behind them two transverse callosities, 

 possibly the dorsal pieces of the metathorax, spread across the base of the 

 wide first abdominal segment." 



Localities : Kansas. Maine, Massachusetts, New York, New Hamp- 

 shire, Rhode Island. New Jersey, Pennsylvania, Maryland, Virginia, 

 North Carolina, Florida, Louisiana, Ohio, Illinois, Tennessee, and Ari- 

 zona. 



Genus RHEUMATOBATES Bergr. 



Body comparatively short and broad, eyes convexly rounded interiorly. 

 Fourth segment of antennae never more than equal to third; basal seg- 

 ment of anterior tarsi much shorter than second; hind femur equal to 

 or much shorter than the hind tibia and tarsus together. 



