MAY FLIES AND MIDGES OF NEW YORK 169 



One species of this genus has been described from North America 

 T. alaskensis Coq. (1900). The venation of the American 

 species differs slightly from this description. See below. 



Telmatogeton alaskensis Coquillett 

 1900 Telmatogeton Coquillett. Proc. Wash. Acad. Sc. 2 : 395 



Male. Head and its members brownish black, the front velvet 

 black, first joint of antennae velvet brown ; antennae about as long 

 as the head, the first joint nearly three times as wide as the 

 others, the latter subcylindrical, the last joint slightly longer 

 than the others and subconical in profile; thorax opaque black, 

 the lateral margins and upper part of pleura varied with yellow- 

 ish, scutellum, metanotum, and abdomen brownish black, the 

 lateral margins of the latter and hind margins of the ventral 

 segments yellow; coxae mottled black, brown and yellowish, the 

 remainder of legs blackish brown, front femora each bearing a 

 transverse, contiguous pair of blunt tubercles near the tip of the 

 under side, and just beyond them a pair of rather " widely 

 separated cavities; front tibiae each bearing a blunt tubercle on 

 the under side near the base, the inner side of each front tibia 

 rather strongly dilated at its first third; first joint of the tarsi 

 nearly three times as long as the second; each of the last three 

 joints slightly over one half as long as the second joint, claws 

 cleft almost to the middle; halteres whitish; wings brownish 

 gray, veins brown, first section of the media yellow, bases of the 

 branches of the radius nearly coalescent ; length 4.5 mm. Yaku- 

 tat, Alaska. 



This species agrees very well with Dr Schiner's description 

 and figures except in the structure of the legs, but these are not 

 sufficiently different to warrant the establishing a separate 

 genus for the present form. Coquillett (loc. cit.) Specimens also 

 from Oregon and California. In these specimens the cubitus forks 

 immediately under the crossvein, the latter oblique, the subcosta 

 reaches the wing margin slightly distad of Cu 2 . Length 4 to 6 mm. 



Genus 30. Macropeza Meigen 

 Syst Beschr. 1:87. 1818. (P1.35, figs. 1, 2, 3) 

 Small, blackish gray species, with long wings and extraordi- 

 narily long legs. Head small; transversely oval; the proboscis 

 and palpi short, antennae 15-jointed; the second basal joint 

 quite large and thick, the other joints peculiarly arranged, the 

 first seven each small at the base and widened toward the end; 



