HUNGERFORD: AQUATIC HEMIPTERA. 65 
“Length to tip of membrane, 442-5 mm.; width of pronotum, 2 mm. 
“Specimens were secured at City Canon, June 26, and also at Ogden 
and Alta.”—Uhler. 
Van Duzee adds Idaho, California and Vancouver Island. 
Saldula dispersa Uhler 1877. 
Proc. Ento. Soc. Wash., 11, p. 383 (1893). 
“Very closely related to S. pallipes Fabricius of Europe, and having 
the white marks of the hemelytra essentially the same as in that species. 
The general form is also the same, but the pronotum is a little narrower, 
with the lateral margins less curved, almost directly oblique., This insect 
varies so much in the amount and distribution of the white marking of 
the hemelytra that no satisfactory definition can be given of its orna- 
mentation. In general, however, it may be seen to have a broad black 
band across the base of the hemelytra connecting with the continuous 
black clavus, and thus forming the inner boundary of the large white 
spot behind the base of each corium. Behind this spot are several others 
of smaller size; the membrane has four pale cells, in each of which there 
is often a black streak. The cheeks are usually white, as is also the 
lower part of the tylus, and the inner side of the basal joint of the an- 
tenne. 
“Length to tip of membrane, 3%4-4% mm.; width of pronotum, 
14%,-2 mm. 
“A few specimens have the tibiz pale testaceous, with black knees and 
tip, and with dark spots at variable intervals. 
“‘Numerous specimens were secured at Salt Lake from June 13 to 25. 
Others were sent to me from various parts of Utah, and I found the 
species to be comparatively abundant in various places west of Denver, 
Colorado.”—Uhler. | 
Van Duzee adds California. 
Saldula interstitialis Say 1825 
Acanthia interstitialis Say, Journ. Acad. Phila., IV, 324, No. 1. 
'D, Mit 
pan 
“Ovate, dull black, closely bronze pubescent, with a few remote, erect ———~ 
black hairs on the head, pronotum, and base of the hemelytra. Head from 
above broad and short, vertical, with a very short neck behind; the eyes 
large, brown, moderately projecting above the line of the vertex; base 
of head moderately convex, minutely shagreened, separated from the 
ocelli by a transverse impressed line; “front almost flat, densely, minutely 
scabrous, the longitudinal groove obsolete; reflexed edge of the clypeus 
yellow or piceous; tylus a little prominent, slightly narrower inferiorly, 
yellowish, a little shorter than the labrum, bald; labrum broad, yellow, 
a little ridged on the middle line, with the sides sloping, the tip bluntly 
triangular and set with stiff hairs. Upper margin of the buccule yellow; 
rostrum reaching behind the end of the posterior coxe, dark piceous, 
paler at tip. Antenne slender; basal joint short and stout, dull yellow, 
with a black line beneath and sometimes obscure on the middle above: 
second joint a little shorter than the third and fourth conjoined, yellowish 
or pale piceous, darker on the middle, slightly thickened at tip; third and 
fourth subequal, dull black, each longer than the basal one, and stouter 
than the second, subfusiform. Pronotum lunate, densely coated with 
prostrate golden pubescence and with longer black hairs_on argi 
and before; lateral margins moderately and abruptly reflexed, the sub- 
margin broadly depressed, of uniform width throughout, minutely scab- 
rous; surface generally minutely scabrous; the callosities forming a 
transverse ridge, sharply bounded by an impressed punctate line which 
curves around the sides and stops at an indented point some distance be- 
hind the anterior margin; posterior margin deeply concave, the lobed 
humeral angles obliquely truncated and with a long tubercle near + 
5—Sci. Bul.—1669. : 
