Psycht [February 



NEW NEOTROPICAL ANTOCHINI (TIPULIDM 

 DIPT ERA). 



By Chas. p. Alexander,' 

 Ithaca, N. Y. 



This paper considers only the members of the Limiiobiinc tribe 

 Antochini, a rather extensive group in the tropics. The genera 

 have an almost Cosmopolitan distribution, occurring in both the 

 Old and New Worlds, exceptions existing in Siyringomyia, Para' 

 iropeza, Thaumastoptera, Diutrepha and Atarba. The material 

 studied herein, is, for the most part, the pro])erty of Cornell Uni- 

 versity and the U. S. National Museum and to Dr. J. Chester 

 Bradley and Mr. Frederick Knab, I am indebted for the privilege 

 of examining these collections. 



A KEY TO THE ANTOCHINB GENERA.' 



1. Cell Rj present (Central and South Amer.) Paralropeza Schinei. 



Cell R, absent 2 



2. Rostrum prolonged, at least as long as the head 3 



Rostrum shorter than the head 6 



3. Rostrum about as long as the head. (Eur. ; N. and C. Am.; Austral.) 



RItamphidia ileigen. 



Rostrum about as long as the body 4 



( Toxorrliina group) 



4. Radial sector two-branched 5 



Radial sector unforked (N. and S. Am.; Africa) Toxorrhina Loew. 



5. Anterior branch of Rs (R^.) long, as long as the posterior branch 



(Rij-O (Eur.; N. and C. Am.; East Ind.) Ehphanlomyia Osten Sacken 



Anterior branch of Jls (Rt+ 1) very short, oblique, tending to disappear. 



(Africa, America; tropics) Ceraiocheilus Wesche 



6. Cu: at least 4 times as long as the deflection of Cui; deflection of 



Cut tending to retreat toward the wing basis..? (Thaumasloplera group) 

 Cu- not much more than twice as long as the basal deflection of 

 Cui; Cui (deflection) remaining at, or near, the fork of M 9 



7. Mi.i.3freeatthewing-tip. (Mjfusedwith Cui obliterating cell Mj.) 



(Europe; Seychelles Is) Thmimastoplcra Mik 



Mi+sfused to the wing-tip 8 



8. Ml distinct from Cu at its tip forming a cell Mi; basal deflection of 



Cu. under the base of Rs. (Eur.;N. and C. Am.; Austral.) 



Orimarga Osten Sacken 



■Contribution from the Entomological Laboratory, Cornell University. 



