The Crane-Flies of New York — Part I 931 



Genus Tanyptera Latreille 



1805 Tanyptera Latr. Hist. Nat. Crust, et Ins., vol. 14, p. 286. 

 1832 Xiphura Brulle. Ann. Soc. Ent. France, vol. 1, p. 206. 



In the genus Tanyptera there are supposedly twelve described species, 

 of which three or four are from eastern North America and the remainder 

 are from the Palaearctic region. The remarkable variation in color, 

 however, is strongly indicative that the number of species is very much 

 less than that given, and it is possible that there is but a single species 

 within the limits of this paper. The question can be definitely settled 

 only by the wholesale breeding of larvae to the adult stage. Until more 

 is known about these flies it is best to recognize the full number of forms, 

 always keeping in mind, however, the foregoing remarks. 



The larvae live in the wood of deciduous trees, often in prostrate trunks 

 that are faii'ly sound. The adult flies are easily distinguished from all 

 other crane-flies by the tripectinate antennal segments of the male and 

 the elongated acicular ovipositor in the female. The flies are shiny, 

 and often are brilhantly colored with black and reddish yellow, simulating 

 Ichneumonidae and other hymenopterous insects. 



The following key divides the local species of Tanyptera: 



1. Wings smoky black; body coloration black, the male with feet and abdomen also black, 



the female with legs and base of abdomen reddish yellow. [Ctenophora fumipennis 



O. S. Proc. Ent. Soc. Phila., vol. 3, p. 47. 1864.] T. fumipennis (O. S.) 



Wings not black 2 



2. Wings tinged with topazine yellow, the stigma dark brown; body coloration varying 



from black to yellow, the feet reddish yellow. [Ctenophora topazina O. S. Proc. Ent. 



Soc. Phila., vol. 3, p. 47-48. 1864.] T. topazina (O. S.) 



^^'ings hyahne, the stigma brown; head black; body coloration varving from black to 

 yellow. \ClJiiwphirra frontalis O. S. Proc. Ent. Soc. Phila., vol. 3, p. 48-49. 1864.] 

 (Plate XLIII, 191.) T. frontalis (0. S.) 



Genus Ctenophora Meigen 



1800 Flabellifera Meig. Nouv. Class. Mouch., p. 13 (nomen nudum). 



1803 Ctenophora Meig. Illiger's Mag., vol. 2, p. 263. 



1910 Phorodenia Coq. Proc. U. S. Nat. Mus., vol. 37, p. 589. 



In the genus Ctenophora a condition exists which is similar to that 

 in Tanyptera, there being fifteen described species which are very closely 

 related and many of which are undoubtedly sjaionymous. Two forms 

 are h(>re recognized, and even these may represent but one species. 

 A nimiber of larvae of Ctenophora were found in a decaying tree by 

 Johannsen (1910), who reared from them a considerable number of adults 



