HEMIPTERA OF COLORADO. 
63 
Boulder, September 4th; Fort Collins (Baker). 
Ambrysus signoretii Stal. 
Fort Collins, August 11th (Baker). 
Zaitha micrantula Stal. 
Fort Collins, August 27tli (Gillette). 
Belostoma americanum Leidy. 
Occasional about electric lights at Fort Collins (Baker). 
Belostoma annulipes H. Schf. 
Pagosa, September 5th (Yarrow—see Uhler, 7). 
Ranatra quadridentata Stal. 
Fort Collins, August 27th (Gillette). 
Notonecta insulata Kirb. 
Mountains, July (Carpenter—see Uhler, 6). Quite common in several pools 
of water standing in hollows near bed of creek on outskirts of Denver, August 
4th and 5th (Uhler, 5). 
Fort Collins, August 27th (Gillete). 
Notonecta niexicana A. and S. Det. by Osborn. 
Fort Collins (Gillette). 
Notonecta iindulata Say, 
In several pools of water standing in hollows near bed of creek on outskirts 
of Denver, August 4th and 5th. Not so common as N. insulata (Uhler, 5). 
Larva, nymph and imago from Sloan’s Lake, west of Denver, July 10th 
(Packard—see Uhler, 5). 
Fort Collins, August 27th; foot-hills five miles west of Fort 
Collins, April 20th (Gillette). 
Corisa calva Say. 
Fort Collins, August 27th (Gillette). 
Corisa expleta Uhler n. sp. 
“Olivaceo-fuscous above, form of 0. alternata Say. Head strongly and bluntly cari¬ 
nate above, the carina produced posteriorly on the base of the vertex; face moderately 
convex, a little peaked above in front of the blunt carina, marked with a line of punctures 
each side, a little hollowed beneath the eyes, and wltn a few shallow punctures there as 
well as towards the front; clypeus depressed, covered with long coarse, white bristles. 
Pronotum subcordate, wider than long, convex, obsoletely and minutely rastrated, with 
the transverse bands bounded in part by scratched lines, the black bands slender, bent 
anteriorly, about thirteen in number, the lateral margin and anterior angles broadly 
yellow, the middle behind the produced occiput marked with a short carina, the apex of 
posterior margin obliquely curved. Palae of female moderately slender, long, cultrate, 
strongly curved, subacute, with long bristles, the trochanter stout and moderately long, 
the coxae long, stout, compressed inwardly and growing wider towards the base. Clavus 
