No. VII.— DIPTERA, BORBORID^ FROM SEYCHELLES. 



By James E. Collin, F.E.S. 



(Communicated by Prof. J. Stanley Gardiner, M.A., F.R.S., F.L.S.) 



Read 15th June, 1911. 



Limosina Macquart, Suit, h, Buff. ii. 571, 1835. 



1. Limosina acrostichalis Becker, Mitth. zool. Mus. Berlin, ii. 126, 1903. 



Belongs to the group of species with more than four strong marginal scutellar bristles, 

 with incurved bristles on the thorax, and with a long bristle on the middle trochanter". 

 It has six strong marginal bristles, also a number of small discal bristles on the scutellum, 

 and one humeral and another bristle on the front of the thorax in a line with the dorso- 

 central row, incurved. Becker does not mention these incurved bristles in describing the 

 species. 



Three males and five females. 



Locality. Mahe : Cascade Estate, about 800 feet and over, X. 1908 — I. 1909; near 

 Morne Blanc, X.— XI. 1908. 



Also recorded fi?om Egypt and the Canary Isles (Becker), and I have seen specimens 

 fi-om Madagascar. 



2. Limosina ferruginata Stenhammer, Kongl. Vet. Akad. Handl. Ixxiv. 397, 1853 

 but published in 1855. 



Undoubtedly the same as the European species and probably the same as the 

 Borborus illotus of Williston from the Island of St Vincent (West Indies). 

 Two males and two females. 



Locality. Mahe: Cascade Estate, about 800 — 1500 feet, 1909. 

 Also recorded from the Canary Isles (Becker). 



3. Limosina hirtula Rondani, Boll. Soc. Ent. Ital. xii. 40, 1880. 



Belongs to the group of species with the disc of the scutellum uniformly bristly, 

 containing ferruginata Stenh., acutangula Zett., albijiennis Rond., litoralis Stenh., 

 vagans Hal., hirtula Rond., liLguhns Hal., and thalhammeri Strobl ; ferruginata is of 

 a reddish-brown colour, acutangula quite distinct in the venation of the male, the next 

 three have the second costal segment longer than the third, and the last three the second 

 costal segment equal to or shorter than the third ; thalhammeri I believe to be a synonym 



* Attention was first called to this group in Ent. Month. Mag. 1902, p. 59 under the description of 

 Limosina haliclayi. 



