AQUATIC INSECTS IN NEW YORK STATE 351 
thorax, leaving the skin, together with the respiratory filaments, 
Gtherwise intact. 
The generic characters of the imagos have already been 
given in sufficient detail in the characters of the family; to 
which need only be added that the tarsal claws of the male in 
all the species I have examined are trifid; those of the female 
being either simple or bifid. All the tibiae are provided with 
spurs, in a few species only are those of the fore legs rudiment- 
ary. The middle and hind metatarsi possess a more or less 
regular row of spines on the extensor margin, which are want- 
ing on the fore metatarsi. On the second joint of the hind 
metatarsus at its articulation with the first, there is usually a 
leaflike appendage covering the base of the flexor surface [p1.38, 
nora S, Oy. 
List of the North American species of Simuliidae, genus Simulium 
Latreille, Hist. Nat. Crust. et Ins. 1804. 14:294. 
l*argus Williston, N. Am. Mauna, no. 7. May 1898. p.253. Cal. (Syn. of 
S. vittatum  Zett. according to Coquillett, Harriman Exp. 1900. 
p.393). ; 
argyropeza. See reptans. 
*bracteatum Coquillett, U. S. Dep’t Agric. Div. Ent. Bul. 10, n. s. 1898. 
p.69. Mass., Cal., N. Y., Kan., Mich. 
calceatum Harris. A catalogue name according to Riley. Am. Ent. 1870. 
p.4G67. 
c/incta. See reptans. 
*cinereum Bellardi, Saggio di ditterologia Messicana. 1:18. Cal. (Town- 
send, Baja. etc. 1893). Mex. (Bellardi). 
columbatchensis Fabricius nec Schénhauer. See reptans. 
decorum Walker, Jist of Dipterous Insects, etc. ptl. 1848. p.112. 
Hudson Bay Ter. (Syn. of S. vittatum Zetterstedt, according to 
Coquillett, n. s. Bul. 10, 1898. p.G8). 
elegans. See reptans. 
erythrocephala. See reptans., 
*fulvum Coquillett, U.S. Nat. Museum Proc. 1902. 25:96: 
1898 ochraceum Coq. not Walk. Mont.; Id.; Col.; N. M.; Alaska. 
*olaucum Coquillett, U. S. Nat. Museum Proc. 1902. 25:97. Missouri. 
*oriseum Coquillett, U. 8. Dep’t Agric. Div. Ent. Bul. 10, n. s. 1898. 
p.69. Col. 
*hirtipes I*ries, Obs. Entomol. Pars, Monogr. Simuliar, 1824. p.17, 5. 
Oeil, ti. oN, key LO, Onl. 
The following synonymy is according to Schiner: 
1880 rufipes Meigen, Syst. Beschr. 6:311-17. 
18380 hirtipes Fries, Meigen, Syst. Bescher. 6;312-18. 
1850 hirtipes Fries, Zetterstedt, Dipt. Scand. 9:3426-28, 
— 
1Those names to which a * is prefixed I consider either a distinct species, 
or not sufficiently described to warrant placing as the synonym of another, 
