On the Nematoccroim Diptera of Jan Mai/ en Island. 235 



Danphina se.vguttata, Mel. 



Triecpliora sexguftata, Mel. Verli. zooL-bot. Ges. Wien, 1915, p. 15. 

 DaupJiinn lallemandi, Jacobi, Voeltzk. Reise Ostafr. Jaliron 1903-1905, 



iii. p.543(1917). 

 Literna lamhcrtoni, var., Lallem. Ann. Soc. ent. France, xxxviii. 



p. 284 (1919). 



Dauphina melanops^ Jac. 



Dauphinn melrmnps, Jac. Voeltzk. Reise in Ostafr. Jahreu 1903-1005, 



iii. p. 543(1917). 

 Literna lambertcmi, Lallem. Ann. Soc. ent. France, Ixxxviii. p. 284 



(1919). 



XXIV. — On the Nematocerous Diptera of Jan Mayen Island. 

 By F. W. Edwards. 



(Publislied by permission of tlie Trustees of the British Museum.) 



So far as I am aware, the only ISTematocerous Diptera known 

 liitiierto from Jan Mayeti are those recorded by Becher in 

 1886 (' Osterreicliisclie Polarstation Jan Mnyen : Insekten ^) ; 

 these include only three species known from elsewhere and 

 five sn[)posed by Becher to be peculiar to the island. In the 

 summer of 1921 a number of insects, including ten species of 

 Nematocera, were collected on the island by Mr. W. S. 

 Bristowe, who has briefly recorded his results in the ^ Trans- 

 actions of the Cambridge Philosophical Society ' (vol. xxi. 

 pp. 38-43, 1922). 



I am very much indebted to Mr. Bristowe for kindly 

 allowing me to examine his interesting material, and for 

 supplying me with notes relating to its capture ; also to 

 Dr. H. Zerny, of the Vienna Museum, for the loan of the 

 types of Sciara globiceps, Gfiironomus incertus, and Ch. cal- 

 losus from Becher's collection. Of the eight species recorded 

 by Becher only four are represented in Mr. Bristowe's collec- 

 tion. The total number of Nematocera now ktiown from 

 Jan Mayen is tlierefore fourteen, the list being as follows; — 



Sciara tridentata, Riibs. G., S. 



bicolor, Mg-. E. 



glubiceps, Becher. 



Rvechia friyida (Holmgren) {Parexechia co7icolor, Becher). B., S., 



? G., A. 

 Scatopse pulicaria, Lw. E., A. 

 Diamem aherrata^ riUndbeck. A., G. 



