PYRGOTA.—RHOPALOMERA. 379 
bristles, except a very small spur on the middle tibia. Halteres piceous. Wings proportionately some- 
what narrower than in P. undata, blackish-brown, hardly less obscure towards the tip; venation as in 
P. undata. 
Hab. GuateMALA, Panima in Vera Paz (Champion). 
A single male specimen. 
TOXOTRYPANA. 
Toxotrypana, Gerstacker, Stett. ent. Zeit. xxi. p. 191 (1860). 
This genus was referred by Gerstiicker to the Trypetine; but according to Low 
(Monogr. Dipt. N. Amer. iii. p. 34) it is better placed among the Ortaline (section 
Pyrgotine), and von Réder is of the same opinion (Wien. ent. Zeit. x. p. 31). 
1. Toxotrypana curvicauda. (Tab. X. figg. 2; 2a, wing.) 
Toxotrypana curvicauda, Gerst. loc. cit. p. 194, t. 2. fig. 9°. 
Had. Mexico, North Yucatan (Gawmer).—ANTILLES, St. John, Antigua '. 
Three female specimens, agreeing with Gerstiicker’s description. In one of them 
the extraordinary cross-vein which unites the second vein with the costa is quite 
rudimentary (see fig. 2a). 
Mikimyia furcifera, Big. (Bull. Soc. Ent. Fr. 1884, p. xxix), from Brazil, is probably 
identical with Toxotrypana curvicauda, Gerst. (of. J. Mik, Wien. ent. Zeit. 1x. p. 251). 
RHOPALOMERA. 
Ropalomera, Wiedemann, Aussereur. zweifl. Ins. ti. p. 570 (1830). 
1. Rhopalomera, sp. (Tab. X. figg. 3; 3a, head from in front; 36, head in 
profile. ) 
Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith), North Yucatan (Gawmer) ; 
GuateMaLa, Torola (Champion); Nicaragua, Chontales (Janson). 
I have attempted in vain to name the numerous specimens of this genus before me 
from the existing descriptions. In most of them the face and antenne are yellowish- 
rufous, and the legs are rufous; but in some darker examples the facial protuberance, 
and sometimes the whole head, is brownish, and the legs are piceous. As there are 
many transitions between the darker and more clearly coloured individuals, I have no 
oubt that they all belong to the same species. 
There is still much confusion regarding the described species of fthopalomera, and I 
therefore merely give a figure of tie Central-American insect, which I hope will be 
recognized by some future dipterologist, who, with more material, may critically review 
this interesting genus. Williston’s paper ‘‘On the Rhopalomeride” (Psyche, 1895, 
p. 183) is nothing more than a preliminary notice. The present species is a true 
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