140 Journal New York Entomological Society. f Vo1 - xxvu. 



i? 4+5 and M 1+< . very close together at the wing margin, the distance separating 

 them less than half the length of m. 



Abdomen dark brown above, the dorso-median line and the posterior 

 margins of the segments a little darker; sternites somewhat paler. Hypo- 

 pygium with the dorsal angle of the pleurites produced caudad as a slender 

 cylindrical fleshy appendage that is blunt at the tip and sparsely provided 

 with coarse hairs. Ventral pleural appendage a slender curved hook, as in 

 G. scimitar Alex, and related species, but even longer, more slender and more 

 curved, bent ventrad, caudad and slightly laterad, the tip acute. The apical 

 inner angle of the pleurite is produced into a short, compressed blade. The 

 penis-guard and gonapophyses extend just beyond the base of the dorsal 

 pleural appendage, pale, with the apex bifid. 



Habitat : Lesser Antilles. 



Holotype, £, Antigua, sweeping at Blubber Valley, March, 1908 

 (H. A. Ballou). 



Type in the collection of Mr. C. W. Johnson. 



In G. scimitar we get an approach to the accentuated condition oc- 

 curring in G. producta, but here the dorsal outer angle of the pleurite 

 is but slightly produced, not more than one-third the length of the 

 pleurite. 



Gonomyia (Leiponeura) extensa Alex. 



1914. Gonomyia {Leiponeura) extensa Alex.; Trans. Am. Ent. Soc, Vol. 

 40, p. 243. 



One male, two females, Gatun, Canal Zone, Panama, Dec. 12-14, 

 1912 (J. Zetek). These agree closely with the type, but the chitinized 

 pleural appendages of the hypopygium lack the acute spines at the 

 tips which may possibly be broken off. The species has been re- 

 corded only from British Guiana. 



Genus Trentepohlia Bigot. 

 Subgenus Neomongoma, new subgenus. 



Two branches of Media reach the wing-margin, M 3 and Cu 1 being 

 entirely distinct ; Cu 2 and 1st A widely separated at the wing-margin. 



Type of the subgenus. — Mongoma disjuncta Alex. (Brazil). 



The large genus Trentepohlia {Mongoma) has been variously 

 subdivided by recent workers on the Tipulidae. It seems convenient, 

 at least, to recognize some of these groups as subgenera. The four 

 that seem best defined are as follows : 



1. Trentepohlia Bigot (type trentepohUi (Wied.)); syn. Mongomio- 

 ides Brunetti (type trentepohUi (Wied.)). 



