MAY FLIES AND .MIDGES OF NEW YORK 245 



Limdbeck (1898, 272) says in regard to this species and C. 

 1. orealis Curtis, that they are probably identical with eitlun 

 O. h y p e r b o r e u s or C. s t a e g e r i. He says further that 

 0. p o 1 a r i s of Holmgren is not identical with either of the 

 above-named species, he having seen the Holmgren specinsens. 

 In Holmgren's species the fore metatarsus is shorter than the 

 tibia, while according to the figure given by Curtis in Ross' Voyage 

 LXXVII, it appears that p o 1 a r i s Kirby is a true h i r - 

 ouomus (sens. str.). Arctic regions. 



65. Chironomus attenuatus Walker 

 1848 Chironomus Walker. List Dipt. Brit. Mus. 1:20 

 1878 Cliir ouomus Ost. Sack. Cat'l. Dipt. N. A. p.20 



Male. Body dark gray, thinly clothed with yellow hairs; abdo- 

 men very long, fringed with hairs on each side; feelers brown; 

 legs dull yellow, hairy, especially the four hinder thighs and 

 shanks ; fore feet very long, hairy at the base ; wings slightly gray, 

 with the usual dark spot on each, and having a fringe of very 

 short hairs ; veins brown ; poisers dark gray. Length of the body 

 8 lines (=6 mm.); of the wings .5 lines (=10 mm.). St Martin's 

 falls, Albany river, Hudson's bay. 



According to the heading of the group to which this species 

 belongs the author states that the wings are hairy. White moun- 

 tains, New Hampshire (Slosson). 



66. Chironomus crassicollis Walker 



1848 Chironomus Walker. List Dipt. Brit. Mus. 1 : 18 



1878 Chironomus Ost. Sack. Cat'l. Dipt. N. A. p.20 



Male. Body blackish broun, downy; chest thick; abdomen 

 much narrower than the chest; feelers and legs brown; wings 

 white, not hairy, very iridescent; veins pale yellow; poisers 

 brown. Length of the body one line (=2 mm.) ; of the wings 1.5 

 line (=3 mm.). vSt ^lartin's falls, Albany river, Hudson's bay. 

 Walker, loc. cit. 



67. Chironomus fimbriatus Walker 



1848 Chironomus W^alker. List Dipt. Brit. Mus. 1 : 20 

 1878 Chironomus Ost. Sack. Cat'l. Dipt. N. A. p.20 



Body brown, hairy, abdomen fringed Avith hairs; feelers and 

 legs pale brown, the latter hairy ; wings colorless, hairy, fringed ; 

 poisers pale brown. Length of the body one half line (=1 mm.) ; 

 of the wings one line (=2 mm.). St Martin's falls, Albany river, 

 Hudson's bay. Walker, loc. cit. 



