= 
274. NEW YORK STATE MUSEUM 
Subfamily cHIRONOMINAE 
GenuS CORYNONEURA 
Winnertz, 1846 
Numerous specimens of C. atra (==-celeripes) were seen 
in July hovering beneath the shrubbery which overhangs a little 
brook near Ithaca, N. Y. The figure given by Winnertz of the 
wing [reproduced in Bul. 86, pl. 36, fig. 7] is not strictly correct. 
The anterior veins though stout do not wholly obliterate the cell 
between them. Only when held obliquely does the wing appear as 
shown in the figure. The larva is described by Thienemann (08). 
GenuS CHASMATONOTUS 
Loew, 1864 
Key of species 
a Yellowish species; abdomen dark brown, wings grayish hyaline, some- 
what smoky in front of the radius. California..h yalinus Coq. (1905) 
aa Dusky species | 
b Wing with two prominent white spots, apex black [ Bul. 86, pl. 27, fig. 16] 
bimaculatus Loew 
bb Wing not marked in this way 
c Wing with two white spots and a very narrow apical margin, whitish 
Invalline,  [Bsenisln CollsiiMlia ooo 50000¢ LASCIlpemMiniGg Cog (iGo) 
cc Wing with fewer spots 
d Wing with longitudinal vitta between the media and the cubitus; 
abdomen with posterior margins of the segments whitish. Alaska. 
univittatus 
d@ Wing with a broad! wihite transverse’ fascia, ING Voorn ses ce Neg: 
unimaculatus 
NOTE. Bul. 86, on page 167, line.10, for maculatus read bimacu- 
ean taese 
Genus HYDROBAENUS 
Fries, 1830 
Both larvae and adults have recently been described by Giard 
(1904). According to this author the male has but 12 antennal 
joints and not 14 as given by the earlier authors. The genus has 
not yet been found in North America. 
Genus PRODIAMESA 
Kieffer, 1906 
This genus is distinguished from Diamesa in having a linear 
fourth tarsal joint, longer than the fifth. A specimen of Prodiamesa 
