hungerford: aquatic hemiptera. 65 



"Length to tip of membrane, AVz-o mm.; width of pronotum, 2 mm. 

 "Specimens were secured at City Canon, June 26, and also at Ogden 

 and Alia."— Uhler. 



Van Duzee adds Idaho, California and Vancouver Island. 



Saldida 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 sam.e, 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- 

 tennae. 



"Length to tip of membrane, SV^-iVz mm.; Avndth of pcronotum, 

 11/4-2 mm. 



"A few specimens have the tibiae 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 



.{.'•nnthia interstitialis Say. Journ. Acad. Phila., IV, 3i?4, Xo. 1. 



"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. bro\\Ti, 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 bucculas yellow; 

 rostrum reaching behind the end of the posterior coxae, dark piceous, 

 paler at tip. Antennje 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 the margins 

 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 the 



5 — Sci. Bui. — 1669. 



