THE CRANE-FLIES oF New YorK — Part I 933 
The genus Stygeropis includes about ten species, all confined to the 
temperate and arctic regions. The species of Stygeropis are readily 
distinguished from those of Tipula by the lack of verticils on the antennae 
(fig. 125,N, page 850). The immature stages are spent in rich organic 
mud. The pupae have a peculiar character in their elongate unequal 
breathing horns. . 
Stygeropis fuscipennis Loew 
1865 Stygeropis fuscipennis Loew. Berl. Ent. Ztschr., vol. 9, p. 129. 
Stygeropis fuscipennis is a medium-sized fly, with the thorax grayish 
brown, the pleura clearer gray, the abdomen brownish yellow, and the 
wings strongly tinged with brown. The wing venation is shown in Plate 
XLII, 194, the ninth tergite of the male hypopygium in Plate XLIX, 255. 
These singular flies are characteristic innabitants of marshy (helophytic) 
situations, and appear on the wing in July and August. 
Genus Aeshnasoma Johnson 
1909 Aeshnasoma Johns. Proc. Boston Soc. Nat. Hist., vol. 34, p. 115-116. 
Aeshnasoma is a monotypic genus which is close to Longurio but 
probably separable from it. The fly is known only from the type station, 
New Jersey, where it is apparently not uncommon. Larvae were found 
in a cold stream near Riverton, New Jersey, by Johnson. They were not 
reared, but the striking resemblance to the larva of Longurio leaves no 
doubt as to their identity. 
Aeshnasoma rivertonensis Johns. 
1909 Aeshnasoma rivertonensis Johns. Proc. Boston Soc. Nat. Hist., vol. 34, p. 116, 
pl. 16, figs. 13-15. 
Aeshnasoma rivertonensis is a large fly, nearly resembling Longurio 
testaceus but with the body coloration strongly reddish brown, including 
the wings, and with cell M, sessile. The abdomen of the male is 30 mm. 
in length, the wing 22 mm. The ninth tergite of the male hypopygium 
is shown in Plate XLIX, 257. 
Genus Longurio Loew 
1869 Longurio Loew. Berl. Ent. Ztschr., vol. 13, p. 3. 
