T56 KANSAS UNIVERSITY QUARTERLY. 



long, the first two joints yellow,, the third brownish or blackish. Cilia 

 of inferior orbit pale. Thorax green, thickly dusted with yellow, not 

 very bright. Above the root of the wing but little brown. Pleurae 

 blackish-green, rather thinly dusted. Cilia of the tegulae black. 

 Abdomen green, before the incisures more coppery, on the sides 

 white pruinose. Hypopygium green basally the remainder black, the 

 lamellae white, ovate, the apex with an ill defined black area, the 

 apical bristles far less strong than in most of th^ species. Coxae 

 yellow, the hind and middle ones considerably blackened at base; the 

 anterior side of the fore coxae is thinly silvery pollinose, the dark 

 hairs very minute except near the apex. The first joint of the fore 

 tarsi is yellow, slender, not very long; the second joint is longer, 

 exceedingly thin and flattened, bare above and below, the edges how- 

 ever with small hairs; the third joint is like the second in structure, as 

 long as the first; fourth joint very small and short; fifth black, com- 

 pressed, oval in outline, nearly as long as the third, the claws however 

 are attached near the base, so the greater part of the length is a disc- 

 like elongation beyond the claws. Beyond the first joint the color is 

 dark. The total length is twice that of the tibia. Middle and hind 

 tarsi each once and a half the length of its tibia, pale at base. Wings 

 long and rather narrow, costa scarcely thickened, veins yellowish. 



Female. Face broad, greyish-yellow pollinose; third joint of 

 antennae reddish-brown or brownish, the tarsi simple, about one and 

 a third times as long as their respective tibiae. 



Length, 5.2 mm.; of wing, 4.7 mm. 



Moscow, Idaho; nineteen males and fourteen females. Common 

 at the edge of water in September. I have deposited a set of types 

 in the University of Kansas collection. 



I have recently sent to the American Naturalist an account of the 

 courtship which occurred in the two preceding species. 



This Dolichopus differs from all the known species in the construc- 

 tion of the fore tarsi in the male; with orandis Aid. it shares the 

 distinction of being the only species with the second joint of the male 

 fore tarsi longer than the first. 



Dolichopus setifer, Locw. 



Four males, five females, Lake Mills, Wisconsin, August. The 

 black spot in the tip of the wing of the male is an easy distinguishing 

 mark of this species. Collected at edge of water, 



Dolichopus ovatus, Loew, 



Numerous specimens, collected with the preceding. 



