264 NEW YORK STATE MUSEUM 



The legs black or blackish brown. The halteres are dark, peduncle 

 and base of knob sometimes sordidly white. The wings gray or 

 smoky, the anal lobe moderately produced into an obtuse angle; 

 the veins are thin and pale, the radius is dark, R^^ug almost 

 straight, the costa extends a little beyond the tip, the media runs 

 into the tip of the wing, the fork of the cubitus is about opposite 

 the crossvein, its posterior branch suddenly deflected. The middle 

 and hind legs are very pilose, the fore metatarsus is about one 

 half the length of its tibia. Length, 1.5 mm. Greenland. Lund- 

 beck, loc. cit. 



10. Camptocladius extremus Holmgren 



1869 Chironomus Holmgr. K. Svensk. Vet. Akad. Handl. 8:5, 40 

 1898 O li i r o n o m u s Lundb. Vidensk. Meddel. p.276, 56 

 1902 Camptocladius Kertesz. Cat'l. Dipt. 1:214 

 1865 Chironomus aterrimus Bohem. Ofv. K. Vet. Akad. Forh. 

 p.575, 21, part 



Male. Black, silky. Antennae fuscous black. Wings whitish 

 hyaline, toward the costa subinf uscated ; the halteres fuscous 

 black, the legs the same color. 



Female. Black, cinereous pruinose. The antennae pilose, the 

 legs fuscous black. Wings somewhat cinereous toward the costa, 

 subinfuscated. Halteres dark. 



Male and female. Wings moderately wide, bare, the margins 

 ciliated, the anterior veins stronger and darker than the others, 

 which are pale and thin; there are two distinct spurious costal 

 veins (folds?) ; a short subcostal vein is usually present. The 

 fork of the cubitus is a little distad of the crossvein, Cug much 

 curved; R^^g ends very near the tip of the wing. The legs of the 

 male have longer pile than those of the female ; in both sexes the 

 tibiae and the tarsi of the fore and middle legs nearly bare. The 

 fore tibiae rather long, straight, thickened at the base ; fore meta- 

 tarsus one half or at least one third shorter than its tibia. Length 

 about 1.5 mm. Greenland. Holmgren, loc. cit. 



This species is closely related to C. byssinus, but it differs 

 in that the base of the fork of the cubitus lies under the crossvein 

 or but little distad of it. Lundbeck, loc. cit. 



G-enus 41. Orthocladius Van der Wulp 



Tijdschr. v. Entomol. XVI (LXX) and XVII, 132 



The larvae and pupae greatly resemble those of Cricoto- 



p u s , and I have been unable to find a single character which 



will separate all the species of the one genus from those of the 



other. 



