AQUATIC INSECTS IN NEW YORK STATE 435 



containing Chirononms and allied genera, the second containing 

 Tanypns and some others, and the third, Ceratopogon etc. Be- 

 sides this, there are a few aberrant genera which can not well 

 be placed in any of the above mentioned groups. 



The bibliography of the biologic literature is rather extensive, 

 specially for European species; and I will therefore give only 

 that which may be of particular interest to the American reader. 



Brauer, F. Syst. Studien auf Gruudlage der Dipteren-Larven nebst einer 

 Ziisammenstellung von Beispielen aus der Literatur ueber dieselben 

 und Beschreibuugeu ueiier Formen. Denkscbr. d. k. zoo. bet. GeselU 

 Wien. 1883. 47:1-100, pi. 1-5 

 Fries. Mouographla Tanyporum Sueciae. 1824 

 Gercke. Verb. Yer. Hamburg. 1877. 4:G, and 1880. v. G 

 Kieffer, J. J. Allgeuieine Zeitscb. f. Ent. Aug. 1901. Ceratopogon and 



Wulpiella 

 Meinert, Fr. De eucepbale Muggelarvei*. Witb extensive bibliograpby. 



1886 

 Miall & Hammond. Tbe Harlequin Fly. On the Life History and 

 Anatomy of Cbironomus dorsalis. Witb bibliograpby. 1901 

 Packard, A. S. On Insects Inbabiting Salt Water, Am. Jour. Sci. no. 2. 

 1871. Species of Ceratopogon (nee Tanypus) 



Essex Inst. Proc. 6:42. Cbironomus oceanieus 



Pettit, R. H. Micb. Acad. Sci. 1900. p.llO. A Leaf-mining Cbirouomn& 

 Osborn, H. Iowa Exp. Sta. Bui. 32. Cbironomus Larva 

 Smith, Sidney. United States Fish. Com. v.2, Rep't for 1872 and 1873. 

 Sketch of tbe Invertebrate. Fauna of Lake Superior. Larva of Cbirono- 

 mus 



The Chironomldae are gnatlike flies of slender form, the males- 

 conspicuous for their plumose antennae. They may be distin- 

 guished from mosquitos, which they resemble very much, by the 

 costal vein not being continuous on the posterior side of the 

 wing. The larvae are soft skinned, wormlike, and usually 

 aquatic, though some are terrestrial. These midges are often 

 seen, specially in the early spring or in the autumn, in immense 

 swarms, dancing in the air. For a more complete characteriza- 

 tion of the family the reader is referred to Comstock's Manual for 

 the Study of Insects or to Williston's Manual of tJic North American 

 Diptera. 



Gercke, in Tcrh. Ter. Hamburg, 1878, 4:225, distinguishes the 

 larvae of Cbironomus and Tanypus thus: "All Cbironomus lar- 

 vae have a cylindrical body, a short oval head; the smaller spe- 



