HUNGERFORD: AQUATIC HEMIPTERA. 1 55 
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, with 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. 
Herrick Scharffer, Wanz. Ms., VIII, p. 111; Uhler, Stand. Nat. Hist., II, p. 270. 
“Tt 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 
piceous, 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-brown; 
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 
fl 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 
fi 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- 
i shire, Rhode Island, New Jersey, Pennsylvania, Maryland, Virginia, 
- North Carolina, Florida, Louisiana, Ohio, Illinois, Tennessee, and Ari- 
i zona. 
: Genus RHEUMATOBATES Bergr. 
i Body comparatively short and broad, eyes convexly rounded interiorly. 
bal Fourth segment of antenne never more than equal to third; basal seg- 
_ ment of anterior tarsi much shorter than second; hind aes equal to 
of or much shorter than the hind tibia and tarsus faction 
y 
