hee 
oi ses sak wh aetna ites Rea 
Mr. F. W. Edwards on British Limnobiidae. 209 
G. abbreviata Lw. This easily recognised species is 
represented in the British Museum by two males, one 
taken many years ago by J. C. Dale; the other I took 
at Cambridge, 2 vi. 1910. Mr. F. Jenkinson has also 
taken a female at Cambridge. 
G. lateralis Macq., is a common and well-marked species ; 
G. alboscutellata v. Ros. (= G. seutellata Kgg.) on the other 
hand seems to be rare; I only know it from Herefordshire 
(Wood). 
G. recta Tonn. Closely resembles D. lucidula Meij., but 
larger, and usually (perhaps not always) with a longer 
discal cell. Hypopygium as in PI. I. fig. 6; note especially 
the peculiar structure of the aedoeagus. This is probably 
a fairly common and widespread species. Verrall’s speci- 
mens were from Freshwater, I. of Wight. I have taken it 
at Hitchin, Herts., Snailbeach, Salop, and Sidmouth, 
S. Devon; in June and July. 
G. lucidula Meij. Probably common. Bonawe, Argyll 
(Waterston); Ffrith, Flintshire; Snailbeach, Salop; Dart- 
mouth (F. W. £.); Gormire and Austwick, Yorks (Cheetham). 
G. tenella Mg. Probably common. British Museum 
material is from Herts., Beds., Hunts. and Dorset. 
G. dentata Meij. Some British records are: Princetown 
and Lyndhurst (Verrall); Loch Assynt (Yerbury); Snail- 
beach, Salop (F. W. £.); Corrour, Inverness (Grimshaw) ; 
New Forest (Sharp). 
G. simplex Tonn. A somewhat larger species than 
G. dentata, and with a dark proboscis, but otherwise 
extremely similar. Hypopygium similar to that of G. 
dentata, but differing in details, notably in the curious 
hook at the tip of the aedoeagus (see Pl. I. fig. 7). All the 
material examined is from hilly or mountainous districts. 
Various localities in Arran (fF. W. £.); Inchnadamph, 
Sutherland (Yerbury); Ffrith, Flintshire (7. W. E£.); 
Nethy Bridge, Inverness (Lamb). 
RHABDOMASTIX. 
As has recently been stated by Alexander, the European 
species Gonomyia schistacea and G. laeta belong to the 
subgenus Sacandaga of Rhabdomastix; they differ from 
Gonomyia in having Cu,a in the middle of the small discal 
cell, the branches of M strongly divergent at the base; 
also in being devoid of yellow coloration. 
TRANS. ENT. SOC. LOND. 1921.—PARTS I, II. (OCT.) P 
