216 Journal New York Entomological Society. t\'°i- >^xil- 



Characters of the Genus. 



Frontal prolongation of the head rather long, the nasus prominent, 

 with a bunch of long hairs at the tip. Terminal segment of the 

 palpus elongate, whiplash-like. Antennjc rather long, at least as long 

 as the head, the scapal segments enlarged, the flagellar segments 

 six in number, elongate-cylindrical ; in the New World species the 

 antennae are about as long as the head, in the males of the Old World 

 forms (this sex of M. bicauda Speiser of Africa not yet described) 

 the antennae are enormously elongated. Eyes w'ith delicate omma- 

 tidia ; the vertex rather approximated between the eyes. 



Pronotum not produced dorsad into a narrow plate as in Taiiy- 

 prcmna. Mesonotal prsescutum not exceedingly gibbous or projecting 

 over the head. Halteres rather long, the knob small. Legs very long 

 and slender, especially the tarsi. Wings with the cross-vein m-cii 

 present and long; basal deflection of R„^^ assuming a position that is 

 nearly vertical or perpendicular. The Old World fuscaua Wiede- 

 mann has a venation that is quite similar to that of our American 

 form except that the cell ist M.^ is much smaller and cell 2iid A very 

 much broader. 



.-\bdomen rather short, the male hypopygium simple; the valves 

 of the ovipositor powerful, the lower valve arcuated basally, the lower 

 valves appressed against the upper pair. 



Megistocera longipennis Macquart. 



1S3.S. Tipula longipennis Macquart; Dipt. Exot., vol. i. pt. i, p. 57, pi. 



5, fig- I- 



1878. ?Longiirio longipennis Ostcn Sackcn ; Cat. Dipt. X. Am., Ed. 

 2, p. 37- 



1885. Tipula longipennis Roder ; Stett. Ent. Zeit., vol. 46, p. 338. 



1885. Tipula tenuis v. d. Wulp ; Notes Leyden Museum, vol. 7, p. 7. 



1885. Tipula tenuis v. d. Wulp ; Tijdschr. \oor Entoni., \ol. — . p. 85, 

 pi. 4, fig. — . 



1886. Megistocera longipennis Ostcn SacUcn : Berl. Ent. Zcit.. vol. 30, 

 p. 161. 



1902. Megistocera longipennis Kertesz ; Cat. Dipt., vol. 2, p. 264. 

 1902. Tipula tenuis Kertesz; 1. c, p. 309. 



1907. ^Megistocera tenuis Needham ; Rept. Soc. Ent. N. Y., p. 212. 

 1909. Megistocera longipennis Johnson; Proc. Bost. Soc. Nat. Hist., vol. 

 34. P- 123. 

 Male, length, 10 nun.; wing, 15.6 mm. 



Middle leg, femur, 11.2 nun.; tibia, 10.6 mm.; metatarsus about 

 26 mm. 



