Fissicorn Tachinidae. 



BY S. W. WILLISTON. 



In " Entomologica Americana," iii, 151, I described a peculiar 

 genus of South American Tachinidae with remarkably developed 

 antennae under the name Talarocera, in reference to the peculiar 

 basket-shape- of the organs. Figures of both male and female 

 antennae I give herewith. Since then two other genera of the same 

 family with these organs abnormally developed have been described, 

 Dichoccra Williston and Diglossoccra Wulp; and Brauer has re- 

 cently * called attention to the fact that Walker long ago f had 

 referred two species with divided third antennal joint to a distinct 

 genus, Schizotachina. Four of the species thus made known, 

 Schizotacliina convecta Walker, .S'. cxiil Walker, Dichoccra lyrata 

 Williston and Diglossoccra bifida Wulp have the third joint some- 

 what similar in structure in the male. In S. convecta, according to 

 the description, the joint is "divided into two parts which are 

 equal in length, slightly curved and converge toward each other at 

 their tips:" in .S'. cxiil, it is "divided into two parts, which are 



^ ^ — i^^.'.' 



^o"^^^^ 



Fig. 1. 'SaXnroccra niyripenniti Wied. ; Antenna of male, 

 linear, rounded at the tips, and of equal length; upper part bent 

 upward;" in D. lyrata, (see figure, Entom. New^s, Jan. 1895, p. 30), 

 the inner division has a foot-like expansion at the tip, touching the 

 curved outer part: in D. bifida, the structure is similar to that in 



* Sitzungsb, kaiserl. Acad. Wissensch. civ. 6CH). 

 + Insecta Saundersia, 2tJ4. 



(171) KAN. UNIV. QUAK., VOL. IV, NO. :J, .JANUARY, 18%. 



