MAY FLIES AND MIDGES OF NEW YORK 



303 



rjosteriorly or less distinct, the lateral ones anteriorly abbre- 

 viated; the pleura yellow, the sternum brown, the scutellum 

 yenow the nietatho/ax more or less dilutely brown. Abdonien 

 yellow with yellow pile. Antennae dilutely brown or jellow the 

 mlpi yellow. Legs and halteres yellow. Wings whitish hyalme, 

 moderately hairy, the anal lobe not produced, widely rounded the 

 veins thin and pale, toward the costa a little stronger, K,+. 

 straioht its apex nearly over the tip of Cu,; the costa is produced 

 a little beyond the tip of the radius, the media runs into he tip 

 the posterior branch of the cubitus is suddenly deflected. The 

 middle and hind legs are hairy; the fore metatarsus is a little 

 shorter than its tibia. 



Female. Shorter than the male, its thorax a little paler, the 

 wings a little more hairy; in other respects like the male Length 

 15 to 2 mm. Southern Greenland. Lundbeck, loc. cit. 

 ' Var a (PI 31, fig.3.) Some Ithaca specimens agree very well 

 with the'above description, but the palpi are pale fuscous instead 

 of yellow, and the sternum is dusky yellow instead of brown 

 The fore tarsi are slightly infuscated and the posterior branch of 

 the cubitus is suddenly deflected near the end similar to but m less . 

 decree than in C a m p t o c 1 a d i u s ; in the latter respect it 

 differs particularly from my specimens of M. n a n u s Meigen. 

 The fore metatarsus is about three fourths as long as its tibia. 



Var 1) A specimen from Chicago is wholly yellow; the mouth 

 paHs,' antennae, three thoracic stripes, a spot on the pleura, the 

 metanotum and sternum, brown. The legs, excepting the coxae 

 and trochanters, somewhat infuscated. Wings hyaline hairy, 

 anterior veins slightly yellow. Halteres yellow. Length 2.5 mm. 



6. Metriocnemus exagitans n. sp. 



(P1.31, fig.4) 



Male. Head yellowish, palpi and antennae fuscous, proboscis 



yellowish; dorsum of thorax with three subshining blackish 



stripes, the middle one divided; the plura, humeri, and space 



between the dorsal stripes, yellow; a spot on the pleura, the 



sternum scutellum and metanotum subshining black. Hairs on 



dorsum 'black. Abdomen wholly fuscous or subfuscous, the 



hairs and the genitalia somewhat paler. Coxae fuscous the 



trochanters and bases of femora yellow; remaining parts of the 



legs sordidly yellow or pale fuscous; the fore metatarsus about 



two thirds as long as its tibia. Wings hairy, hyaline, very slightly 



smoky; R.^, extends nearly to the tip of the wing; ^osta extends 



a little beyond the tip of R,+,; venation as figured^ Halteies 



yellowish. Length 2 mm. Two specimens, Ithaca, N. \. 



