Diptera of St. Vincent {West Indies). 297 



were originally described as having twenty-eight joints, 

 and the true number, sixteen, was not known till speci- 

 mens were examined by Loew. The joints in this sex 

 are very closely united, and it is only by close exami- 

 nation that the number can be made out. From 

 P. fusca, Wiedemann, and P. ohscura, Macquart, which 

 seems to be a distinct species, the present appears to be 

 so closely allied, that the short descriptions will hardly 

 distinguish them. However, Wiedemann figures the 

 female antenna as elongate, like those of the in ales, but 

 with simple, not constricted joints. In the present 

 species, the female antennae are short, in fact not longer 

 than the thorax, and are of the ordinary Tipulid struc- 

 ture ; that is, the joints are oval, slightly hairy, and are 

 easily distinguishable. The first joint is not cylindrical, 

 and is not provided with short, closely-set hairs, as is 

 described. The figure given by Macquart shows short 

 and abundant hairs on the swellings of the male 

 antennae, very different from the long, delicate hairs of 

 the present species. 



Species Incertji: Sedis. 



Two species of Tipulidse, represented by single, more 

 or less mutilated specimens, I cannot locate. I give 

 figures herewith, which will, I believe, render the identi- 

 fication not doubtful. One of them (PI. X., figs. 72 and 

 72a) possibly represents a new genus. The tip of the 

 antennae is broken ofi', otherwise the specimen is com- 

 plete. If the antennee are but ]4-jointed, the species 

 would be located in Rhipidiay from which, however, the 

 structure of the male organs show distinct differences, 

 and the antennae are hardly sufficiently pectinated. If 

 there are sixteen joints, Schiner^s and Osten Sacken^s 

 tables will carry the species to Antocha. This genus and 

 Thaum astoptera are almost the only ones in this group 

 which I do not know. Still, the neuration is sufficiently 

 distinct to render its location with Antocha practically out 

 of the question. 



