( 387 ) 





XX. Falkland Islands Diptera. By C. G. Lamb, M.A., 

 B.Sc, Clare College, Cambridge. Communicated 

 by F. W. Edwards, F.E.S. 



[Read October 18th, 1916.] 



Through the kindness of Mr. F. W. Edwards, of the 

 British Museum, I have had the opportunity of examining 

 a small collection of flies from the Falkland Islands. In 

 part this collection was made by Mr. R. Vallentin in the 

 years 1901-3; the remainder was collected by Dr. M. 

 Cameron (of H.M.S. Cornwall) on Dec. 7, 1914, when he 

 paid a hurried visit ashore the day before the naval 

 engagement off those islands. 



There are four species in the collection, of which three 

 appear to be undescribed. The known species is the 

 Borborid Antrops truncipennis described by Enderlein in 

 Zool. Anz. Bd. xxxiv, p. 226, 1909. Specimens of this 

 species were collected both by Vallentin and Cameron. 

 One of the new species is a Phycodromid. Enderlein 

 gives a conspectus of the genera of that family in the 

 "Deutsche Siidpolar. Expedition" (X. Zool. ii, 1909); 

 according to his tables the species falls within the limits of 

 the genus Oedoparea, though it is sufficiently distinct from 

 the normal form of that genus to warrant generic rank 

 should more related forms be discovered. The other two 

 species are almost wingless forms closely allied to Scatella. 

 Becker gives a beautiful figure of his Scatella brevipennis 

 in "Belgica," Zool. Ins. (1906), Plate III; one of the 

 new species must be very similar in appearance to that 

 species, but on comparison distinct differences are visible : 

 in particular Becker states that the costa plainly ends 

 at the 3rd vein, thus fixing his species as a Scatella. In 

 the new species the wings and venation are more reduced, 

 and it is quite impossible to state whether they are to be 

 considered as members of that genus or of Scatopliila. 

 When further stages of wing reduction come to light, the 

 point may be settled, and it will probably be found that 

 the relationships of the new species are to be sought for 



TRANS. ENT. SOC. LOND. 1916. — PARTS III, IV. (APRIL '1?) 



