HUNGERFORD: AQUATIC HEMIPTERA. 61 
subequal, the third a little thicker, both slender on the ends. Pronotum 
subecampanulate, narrow, very much rounded in front, the lateral mar- 
gins flattened and a little reflexed, but tapering very slenderly in the di- 
rection of the collum, before reaching which it turns downward and fades 
out; the anterior lobe very narrow, but strongly convex, indented on the 
middle and constricted in front, more or less golden pubescent, and 
punctate in the depressed lines; the posterior lobe flattened, transversely 
a little wrinkled, shagreened, and somewhat pubescent; the posterior 
margin deeply concavely sinuated, the humeral angles produced, broad, 
flat. Scutellum densely shagreened, sparingly pubescent, a little convex 
at base, and depressed before the tip. Prosternum either black, or 
broadly margined each side behind with white, and, together with the 
disks of all the pleural pieces, pubescent and rugulose. Coxe terminated 
with piceous or testaceous, the femora pale piceous or yellowish, darker 
at the knees, and sometimes with a few brown dots on the sides; tibize 
yellow, infuscated at tip, and with the spines piceous; tips of the tarsal 
joints dusky or piceous, with the nails paler. Hemelytra highly polished 
coal-black, remotely set with shallow punctures, faintly. golden pubescent, 
the costal margin strongly arcuated, at base broadly expanded, and a 
little upturned, the edge recurved, and the area very broad, the up- 
turned margin continued tapering to near the tip of corium; the clavus 
bounded on the inner sub-margin and outer suture by impressed punc- 
tate lines; membrane almost as thick as the corium, black, tinged with 
piceous, sometimes with about three pale brownish ‘spots in the longer 
areoles. Venter brilliant black, closely, minutely punctate, coated with 
sparse, fine pubescence. The hemelytra are wider at base than the pro- 
notum, and they gradually widen in their curve posteriorly. 
“Length to tip of venter 5-6 millimeters; to end of membrane 6-7 
millimeters. Width of base of pronotum scant to full 2 millimeters. 
Full width across the corium 3-3% millimeters. 
“The greatest number of specimens thus far acquired have been from 
eastern Massachusetts. Mr. Sanborn collected several near Andover; 
Mr. Scudder secured one in the vicinity of Lake Winnipeg; Robert Ken- 
nicott found it in British America, near Mackenzie river; other speci- 
mens have been sent to me from Northern Illinois; and the Museum of 
Comparative Zodlogy has specimens from British Columbia, collected 
July 14. The genital segment of the male is wider than long, almost 
gibbous, with the central attachments stout, curved toward each, and the 
exterior appendages long, slender, and overlapping each other when at 
rest. A specimen, the original type, was taken at Ogden, Utah, and 
another oe Sania tie tase ot Denver. ‘The nymph, from 
Massachusetts, has the usual 2-jointed tarsi, is broader and relatively 
flatter than the imago, and much resembles, particularly in the form of 
the abdomen, the common oriental cockroach.”—Uhler. 
Van Duzee adds New York, New Jersey, Maine, and Ontario. 
L@ Salda anthracina Uhler 1877. 
Uhler Bul. U. S. Geol. Surv. III, p. 438. 1877. 
“Form of S. coriacea, but still more slender, the pronotum narrower 
and more convex, and the wing-covers very arched and decurving over 
the body like the shell of a terrapin. Deep, coal-black, shining. Head 
_ moderately narrow, minutely pubescent; the eyes very large, prominent, 
and oblique; face long, oblique, dull black, rugulose, with the impressed 
lines faint, and the shield of the vertex obsolete; base of head forming a 
distinct neck, coarsely shagreened and rugulose, a little flattened on top, 
rounded off posteriorly. Rostrum reaching to the posterior coxe, piceous- 
black, paler at tip. Antenne stout and long; the basal joint long, black, 
not much thicker and but little shorter than the third; second about 
twice as long, yellow, black at base, dusky, and a little enlarged at tip; 
