Dipteru yematocet'd from Sju'tsberrjeu. 211 



(luartcr iiiile iiihiiul; 5^,2 ? . S.W. of island, 22. vi. VJ21 ; 

 iiiuler wulius bones, on moss; 1 cJ . Tundra, W. of Mount 

 Misery, IG. vi.l'J21 ; 3 J. 



Spitsbi:k(;i:n : Bruce City, Klaas Hillen Bay, l'J-22. vii. 

 1U21 ; round liuts, on shingle of raised beacli ; 2 (^, 2 ? . 

 Capo Bohenian, N. side of Ice Fjord, 12. vii. 1921 ; Hying 

 over strip of marsh land ; 2 cJ , 7 ? . 



N. EDiMJURfJH I. (S.W. of Prince Charles' Foreland) : 

 on stones of rocky beach just above high tide, 29. vi. 1921 ; 

 8(?,10 ?. 



I thiuk this identification is quite certain. There is a 

 rather remarkable sexual diffei'ence in the wings; in the c? 

 the hairs are confined to the apical fourth, whereas in the 

 ? nearly the whole surface is rather scantily hairy. The 

 structural characters are otherwise almost identical with 

 those of M. cnturadaruin, Kieff. 



Metriocnemus brevinervis (Holmgren). 



Spitsbergen : Bruce City, head of Klaas Billen Bay, 

 22. vii. 1921 ; on shingly raised beach with Dnjas ; 2 cJ • 



On venatioual and other characters this belongs to the 

 same group as M. angulatus, Goet., and M. impensus, Walk., 

 but it is much darker than these species. Hvpopvgium, 

 fig. 10. 



DiAMESA, Mg. 



The genus Adiamesa, Kieff., is founded solely on the 

 characters of the male antcnnie, and is indistinguishable 

 froiii Diamesa in the female sex ; 1 therefore prefer to 

 include it under Diamesa. Psilvdiamesa, Kieff. (which is 

 unknown to me), stems to be distinct by venation. Some 

 of the species dealt with below have bare eyes, and would 

 perhaps be included by Kieffer in Psilodiamesa, but as the 

 venation of these is normal, and as the length and density 

 of the eye-hairs varies with the species, 1 prefer not to 

 separate them from Diamesa. None of the Spitsbergen 

 species are identical with any of the ten British forms of 

 this group known to me. 



Diamesa ursus (Kieffer). 



Bk AH IsLAxn : Walrus Bay, 15-22. iv. 1921 ; on bare rock, 

 under plank, and under stones (juarter mile inland ; 3 ? . 

 Inland from S. coast, l-l. vi. 1921; on hillock green with 

 vefretation ; 3 ? . 



This species was described from the r^ onlv, and the 



