372 Professor Williston on the 



A single specimen without abdomen and liind legs, but 

 which, otherwise, agrees so well with the description of 

 this species that I believe the determination is sufficiently 

 certain. 



Calobata. 



Meigen, Illiger's Mag., 1803; Geijx, Dumeril, 1801. 



1. Calohata angulata. 



Calohata angulata, Loew, Centur., vii., 87 ; Schiner, 

 Reise der Novara, Dipt., 253, Brazil, Colombia 

 (Schiner, Loew). 



In the present collection there are about twenty 

 specimens which were thought at first sight to be 

 conspecific. A more careful examination, however, 

 disclosed trustworthy specific differences. Both of 

 the species are evidently closely allied to G. lasciva, 

 Fabr., and it is not improbable that they have been 

 confounded with that species. I do not know G. lasciva, 

 but they differ, according to Schiner, in the light-coloured 

 bands of the hind femora being oblique. Schiner 

 thought that C. angnhita might be identical with 

 C. annidata, P., but, if my determinations are correct, 

 he was in error. In the present species the front is 

 very narrow and long, distinctly less than one-third of 

 the width of the head. The front tarsi are white from 

 near the middle of the metatarsi, the terminal joints 

 scarcely perceptibly darker. The lighter-coloured por- 

 tions of the wing are subhyaline, and the first posterior 

 cell is narrowly open The head is reddish-yellow with a 

 small dark-red or black spot in the middle of the front. 

 The antennae in all our specimens are more reddish than 

 black. I have compared specimens from Brazil in my 

 collection, and find no differences. 



2. Galohata annulata. 

 Musca annulata, Fabricius, Syst., iv., 338 ; Syst. Antl., 



262. 

 Calohata annulata, Wiedemann, Auss. Zw. Ins., ii., 



534. — Cayenne. 

 Grallopoda annulata, Rondani, Esapoda Ditteri, 178. — 



Ins. St. Sebastian. 



The species which I identify as this from both St. 

 Vincent and Brazil, has a dark reddish-brown head, with 



