189S.] 



]09 



connected with 

 them are two 

 shorter processes, 

 the inner margins 

 of which are (as 

 seen in prepared 

 examples) finely 

 serrate. Lying 

 above these is a 

 broad penis cover 

 (?) turned down 

 at the apex. Su- 

 periorly is an ob- 

 long dorsal plate 

 with rounded cor- 

 ners. A mode- 

 rately long ventral 

 lobe. 



Expanse of wings, 7 mm. in <? , 8 mm. in $ . 



Four examples from Bone, April 7th, 1896 {Eaton). 

 Also apparently a true Sydroptila. 



Fig. 1, apex of abdomen from beneath (from prepared and mounted example) ; 2, inferior ap- 

 pendages (from a dry example » ; 3, dorsal plate and penis ^mounted example) ; 4, apex of 

 abdomen from .side idry example). 



13, Blackford Road, Edinburgh : 

 March Uh, 1898. 



^ 



TROCHOPUS AND RHAQOVELIA. 

 BY GEORGE H. CARPENTER, B.Sc, F.E.S. 



I am greatly indebted to Mr. G. C. Champion for kindly calling 

 my attention to the similarity of the genus TrocJiopus (which I de- 

 scribed and figured in last month's issue of this Magazine) to 

 Rhagovelia of Mayr* (of which he has generously sent me several 

 species for comparison), as well as for informing me that, after ex- 

 amination of the types in the British Museum, he considers my species 

 T. marinus to be undoubtedly identical with Rhagovelia plumbea, Uhler,t 

 described from specimens found on salt water oflF the islands of Grenada 

 and St. Vincent, and also around the inlets of the Florida Keys. 



On carefully reading Prof. Uhler's description I must admit that 

 it agrees sufficiently well with my types. Yet, even if I had noticed 

 this similarity when writing my paper, I should not have thought it 

 possible that my Jamaica specimens could be referable to Prof. TJhler's 

 species, since he makes no mention whatever of the conspicuous and 

 characteristic " wheel " of ciliated hairs in the cleft of the intermediate 



VerL. zool.-bot. Ges. Wien, 1865, p. 44.5. 



+ Proc. Zool. Soc. Lond., 1894, p. 216. 



