GERANOMYIA. 79 



lished six species from Brazil, Chile, and the West Indies ; Mr. 

 Walker (List, etc. Yol. I), one from Jamaica and (Dipt. Haund. 

 pt. V) one from Brazil ; Dr. Philippi ( Verh. Zool. Bot. Ges. in 

 Wien, 1865, p. 59T, Tab. XXIII, fig. 1) described four species 

 from Chile under the new generic name of Plettusa ; Mr. Bellarcli 

 (Saggio, etc. Appendice, p. 2) one from Mexico. As three 

 species from the United States have been described below, this 

 makes a total of twenty species, only four of which belong to the 

 old world. 



Macquart's Aporosa and Philippi's Plettusa being identical 

 with Geranomyia and posterior to it in point of time, have to be 

 given up as generic names. 



The name Geranomyia is derived from ytpavo$, a crane, and 

 juuto, a fly. 



Table for determining the species. 

 j ( Wings spotted. 1 rostrata Say. 



I Wings not spotted. 2 



f The auxiliary vein ends in the costa nearly opposite the origin of the 

 j praefurca. 2 diversa 0. S. 



j The auxiliary vein ends in the costa far beyond the origin of the 

 praefurca. 3 canadensis Westw. 



Description of the species. 



1. G» rostrata Say. % and $. — Alis fusco-maculatis et nebulosis. 



Wings with brown spots and clouds. Long. corp. 0.3. 



Syn. Limnobia rostrata Say, Journ. Acad. Nat. Sc. Phil. Ill, p. 22, 6. — 

 Wied. Auss. Zw. I, p. 35, 20. 

 Geranomyia rostrata 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 207. 



Front and vertex gray ; proboscis and antenna black. Thorax 

 grayish, often with a yellowish or brownish tinge ; three more or 

 less distinct brown stripes ; pleurae with a hoary bloom ; scutellum 

 and metathorax brownish, with a grayish bloom ; halteres with 

 a dark brown knob ; feet tawny, tips of the tibiae black, sub- 

 clavate in appearance ; tips of the tarsi infuscated. Abdomen 

 brown, venter paler. Wings with five brown spots along the 

 anterior margin ; the cross-veins and the tips of all the veins 

 along the apex and along the posterior margin are clouded with 

 pale brown. 



Hab. Washington, D. C. ; Xew York; Massachusetts; Illinois; 

 Canada. I have brought home a specimen from Cuba, which I 



