The Crane-Flies of New York — Part I 921 



fusion rather than by atrophy. The larvae are carnivorous, and hve 

 in wet sand and gravel along the margins of streams (Alexander, 1915 a: 

 141-148). 



Hexatoma megacera (0. S.) 



1859 Anisomera megacera O. S. Proc. Acad. Nat. Sci. Phila., p. 242. 



1909 Hexaloma megacera Johns. Proc. Boston Soc. Nat. Hist., vol. 34, p. 126. 



Hexatoma megacera is a small, blackish gray fly, the mesonotum having 

 three darker stripes and the male antennae being somewhat elongated 

 and filiform. The characteristic venation is shown in Plate XXXVII, 112. 



Genus Penthoptera Schiner 



1863 Penthoptera Schin. Wien. Ent. Monatschr., vol. 7, p. 220. 



In the genus Penthoptera there are seven species — four from Europe, 

 two from tropical America, and one local species. The immature stages 

 are spent in rich organic earth, a very different habitat from that of the 

 larvae of the related genera Eriocera and Hexatoma. The larva is 

 carnivorous (Alexander, 1915 a: 152-157). In the native species, Penthop- 

 tera albitarsis, the feet are pure snowy white, which makes the insect a 

 conspicuous one. 



Penthoptera albitarsis O. S. 



1869 Penthoptera albitarsis 0. S. Mon. Dipt. N. Amer., part 4, p. 257. 



Penthoptera albitarsis is a brownish fly, with the thorax bluish gray, 

 the wings slightly tinged with dusky, and the feet pure snowy white. 

 The flies occur in cool, shady situations and are often very common. 

 In the South (North Carolina) they are frequent in gum swamps. The 

 venation is shown in Plate XXXVII, 104. 



Genus Eriocera Macquart 



1830 Caloptera Guer. Voyage de la Coquille, Zool., Ins., pi. 20, fig. 2. 



1838 Eriocera Macq. Dipt. Exot., vol. 1, p. 74. 



1838 Evanioptera Guer. Voyage de la Coquille, Zool., vol. 2, p. 287. 



1848 Pterocosmus Walk. List Dipt. Brit. Mus., vol. 1, p. 78. 



1850 Allarithmia Loew. Bernstein und Bernsteinfauna, p. 38. 



1857 Oligomera Dolesch. Natuurk. Tijdschr. Nederl. Indie, vol. 14, p. 387. 



1859 Arrhenica 0. S. Proc. Acad. Nat. Sci. Phila., p. 242. 



1859 Physecrania Bigot. Ann. Soc. Ent. France, ser. 3, vol. 7, p. 123. 



1912 Androclosma Enderlein. Zool. Jahrb., vol. 32, part 1, p. 34. 



1916 Globericera Matsumura. Thous. Ins. Japan, add. 2, p. 471. 



