316 A. L, MELANDER. 



acute, the anterior branch straight, the posterior branch terminating in the wing- 

 margin slightly beyond the tip ; first snbmarginal cell broader than the marginal, 

 about as broad as the first posterior cell ; sixth vein evanescent toward its apex ; 

 no strong costal bristles present. 



Nineteen specimens; Idaho (J. M. Aldrich). 



Empis loripedis Coquillett (Fig. 131). 

 Proc. Nat. Mus., 1895, p. 400. 



Male. — Head black, gray pollinose ; eyes separated as widely as the posterior 

 ocelli, facets of a uniform size; antennse black, third joint somewhat over twice 

 as long as the first, slender, tapering gradually to the middle, then<!e of an eqnal 

 breadth ; style nearly one-third as long as the third joint; proboscis one and one- 

 half times as long as the height of the head, palpi yellow. Thorax black, opaque 

 gray pollinose, marked with four dark brownish vittsB, almost destitute of pile, 

 the bristles black ; pleura black, sometimes partly yellowish, bluish gray polli- 

 nose, pile in front of haltei'es black ; scutellum black, gray pollinose, bearing two 

 bristles. Abdomen compressed, shining, black; the broad hind margin of each 

 segment laterally yellow, sometimes extending to the anterior edges of the seg- 

 ment, dividing the black color into three vittse, medio-dorsal and lateral ; pile of 

 abdomen sparse, black; venter yellow; hypopygium rather large, ascending, 

 abundantly black-pilose, middle lamellae yellow, broadening to the tip; filament 

 very thick at base, then suddenly attenuated and bristle-like, arcuate. Legs, 

 including the coxae, light yellow; apical half of front tibiae and extreme apex of 

 the others, front tarsi wholly, apex of the first two joints and the whole of the 

 remaining joints on the middle and hind tarsi, usually but not always a dark 

 brown ; all the tibiae and tarsi furnished with numerous long black pile; on the 

 under side of each hind femur before its apex is an irregular, three-pronged pro- 

 cess, and on the inner side of each hind tibia near its base are two processes, one 

 behind the other; just before the basal process the tibia is hollowed out; front 

 metatarsi nearly twice as long and three times as thick as the middle ones, hind 

 metatarsi one-half thicker and one-third longer than the middle ones. Knob of 

 halteres light yellow. Wings dark gray, stigma slightly darker, vein dark brown. 

 6-7 mm. 



Female.— Ijike the male, except that the hind femora and tibiae are destitute of 

 processes, the front metatarsi are not thicker than the middle ones, while the 

 hind metatarsi are much thicker than and fully as long as the front ones; abdo- 

 men tapering to the apex. 



Illinois and Ohio. 



Einpis gladiator sp. nov. (Fig. 134). 

 Male and Female. — Length 6-7 mm. — Rather slender, more or less yellow spe- 

 cies. Head black, cinereous, occiput somewhat conically formed ; eyes wine-red, 

 separated a little more widely than the posterior ocelli, which are, however, 

 rather close together, facets small, uniform ; palpi slender, yellow, with very few 

 short hairs; proboscis one and one-half times the head-height, yellowish, the ex- 

 treme tip darkened, the labella fleshy, fulvous, reaching down one-half the 

 length of the proboscis in the male and to the tip in the female ; antennae slen- 

 der, as long as the head-height, the first two joints dark fu.scous, provided with a 



