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 

 XLIII, 194, the ninth tergite of the male hypopygium in Plate XLIX, 255. 

 These singular flies are characteristic inhabitants of marshy (heloph^^tic) 

 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 river tojiensis Johns. 



1909 Aeshnasoma rivertonensis Johns. Proc. Boston Soc. Nat. Hist., vol. 34, p. 116 

 pi. 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. 



