HEMIPTERA OF COLORADO. 
61 
throughout the summer, especially on water in ditches; 
during winter hibernates under stones, rubbish, etc. (Baker). 
Dolores, June 16th (Gillette). 
IJmnotrechus marginatus Say. 
On surface of puddles in western suburbs of Denver in August (Uhler, 5). 
Near Manitou, July loth (Packard—see Uhler, 5). Common on Grape Creek, 
West Cliff, Custer County, May 25th (Cockerell, 10). 
himnotrechus productus Uhler n. sp. 
“Larger and somewhat more robust than L. marginatus Say. with long, somewhat 
flattened, anal processes of a yellow color forming the prolonged ends of the flat, broad 
connexivum, and is of the same color as the last three segments. Color of the upper 
surface dark brown with a tinge of fuscous on the pronofcum. Head of medium length, 
fuscous, covered with silvery, scaly pubescence on the lower sides and beneath. The 
antennae short and stout, rusty brown, the second and third joints a little thicker and 
darker at tip, the second shorter than the apical, but longer than the third, the basal one 
a little longer than the superior line of head, the fourth a little shorter, dark in color and 
tapering towards the tip. Rostrum swollen at base, reaching a little behind the anterior 
coxae, with the tip black. Pronotum with the anterior lobe quadrangular and flat, a very 
little shorter than wide, the anterior border a little thickened and raised, the middle line 
behind this depressed and marked with a short, yellow stripe, the posterior lobe evenly 
rounded off, a little flattened, destitute of a carinate line, lateral margius narrowly 
yellow; underside all silvery white. Legs of medium length, pale rusty beneath, the 
posterior femora as long as from the base of posterior coxae to the end of venter. 
Veins of corium prominent, two of the oval medio-apical areoles pale. Sutures of con¬ 
nexivum pale, outer half of the connexivum of the last three ventral segments including 
most of the segments themselves and the cerci, yellow, the middle line of venter with 
four ind mted spots. 
Length to end of anal segment 10 mm. Width of pronotum 2 mm. A single female was 
sent to me from Colorado.” 
Fort Collins, April 13th (Gillette). 
I,iiniioporiis rufoscutellatiis Latr. 
From stagnant water above the Rio Grande (Rothrock—see Uhler, 2). 
Mountains, July (Carpenter—see Uhler, 6). Seems to be common in Colorado, 
where it attains to full proportions, and puts on its clearest russet-brown coat 
(Uhler, 6). On surface of small ponds and puddles in depressions of plains 
west of Denver, August 8th and later (Uhler, 5). Denver, July 28th (Packard 
—see Uhler, 5). 
Hebrus coiicinnus Uhl. 
Fort Collins, April 7th to October 15th (Baker). 
Hebrus sobrinus Uhl. 
On margins of ponds west of Denver (Uhler, 5). 
Microvelia americana Uhler n. sp. 
“Dark brown,velvety above, more or less powdered with plumbeous, body a little 
tapering behind the curved base of sides. Head short, triangular before the eyes, 
margined with silvery, prostrate pubescence from behind the eyes and along their inner 
border forward to the cheeks; the throat testaceous; middle line of head obsoletely 
callous-carinate; rostrum testaceous, piceous at base and tip, reaching fco the posterior 
line of the anterior coxae; antennae slender, obscure testaceous, darker on the tip of the 
