120 Mr. J. E. Oolliii on Diptera from 



shingly raised beach with Brya^ &c., one on Aug. 2nd 

 on flowers of Silene hirciilus near pond, one on Aug. 4th on 

 tundra on shingly raised beach, and one on Aug. 14th on 

 hut-window or ledge below. A" single female was captured 

 on July 10th on Prince Charles Foreland, 30-80 feet (island 

 west of Spitsbergen), Freshwater Bay district N.E. of island, 

 amid flowers of Silene acaulis on rock on hill. Also a single 

 female on July 18th from south side of Ice Fiord, Advent 

 Bay, 0-100 feet, on flowers of JDryas ociopelala and Cera^- 

 tium alpinum. 



All these specimens (except that from Advent Bay) are 

 dwarfed (about 3*5 mm.), and possess usually only three 

 pairs of strong postsutural dorso-central bristles on thorax, 

 the second pair behind suture absent or only represented by 

 a stiff hair. Moreover, the discal cell is somewhat pointed at 

 the lower outer angle as in pawA^'Z^a, Holmgr., and illuta^ 

 Holmgr. ; nevertheless, I cannot consider them in the absence 

 of the male as anything move than a variety of the megastoma, 

 Boliem., recognized by Ringdahl as occurring in Northern 

 Scandinavia. The same species also occurs in tho island of 

 Jan May en. 



MUSCID^ ACALYPTRAT^. 



Scatophaga vari'pes, Holmgr. 



A pair taken by C. S. Elton, Aug. 14th, on hum;in dung 

 just above high tide on the raised shingly beach at head of 

 Klass Billen Bay, Bruce City. 



This species differs primarily from squalida in having in 

 tlie male more pilose legs, without the antero-dorsal row of 

 strong bristles on hind" femora, at most with only 1-2 such 

 biislles towards tip ; the hind tibise are more curved, the fine 

 hairs on thorax rather longer, and the two rows of acrostichal 

 hairs -somewhat nearer each other. In the female, though 

 the row of bristles is present above hind femora, the legs 

 (especially the hind tibia?) are longer-haired than in squalida. 

 Both cross-veins of each wing are strongly infuscated. 



The northern species of Scatophaga are not well known, 

 S. varipes was described from specimens caught in Nova 

 Zembla, and has not previously been recorded from Spits- 

 bergen. I have seen specimens from the island oi: Jan 

 Mayen. It appears to vary (as its name indicates) in the 

 colour of its legs. 



