all 
220 =~Mr. F. W. Edwards on British Limnobiidae. 
C. carteri, Tonn.* (Pl. IT. fig. 16). 
Closely allied to C. bergrothi, Kuntze, differing almost solely in 
the hypopygium (see fig. 16): the side pieces are more slender than 
in Kuntze’s figure, the outer clasper hooked at the tip (straight in 
bergrothi), the inner clasper moderately stout and straight (slender 
and recurved in bergrothi). The venation is somewhat variable, 
particularly in regard to the position of Se, (at or well before tip 
of &c,) and Cu,a (near base or almost in middle of discal cell). In 
some specimens the middle and hind tibiae show a single minute 
spur at the tip, which is apparently absent in others. Some speci- 
mens show 10, others 11 joints in the antennal flagellum beyond 
the fusion-joint. C. bergrothi and C. carteri both differ from 
C. limnophiloides as follows :—Marginal cross-vein present though 
usually very faint; R, not much longer than R, , ,. or even slightly 
shorter; Ax shorter and straighter; side pieces of hypopygium with 
a peculiar long stout spine (evidently a modified bristle) at the base. 
Polton, Midlothian, 25 v. 1915 (A. EF. J. Carter), one 
male and one female presented by the collector to the 
British Museum; Ffrith, Flintshire, 7 at i 1919 (F. W. Hee 
2 2; Snailbeach, Salop, 22-28 vii. O(F. WE.) 1 9; 
Victoria Park, Manchester, 22 viii. ah (H. Britten), 1 3. 
IDIOPTERA. 
I do not consider the differences between [dioptera and 
Ephelia to be of generic value, and propose to combine the 
groups; if the latter is regarded as distinct, it must take 
Rondani’s name Elaeophila, which is older than Ephelia. 
Idioptera as a whole differs from the other genera of the 
Limnophila group in possessing an extra cross-vein in the 
lower basal cell, but the distinction is not by any means 
a fundamental one. The cross-vein is occasionally absent 
on one or both wings in J. pulchella and I. marmorata. 
The following table will separate the British species 
(omitting I. decora Hal., which is doubtfully synonymous 
with 2. marmorata Mg., and I. submarmorata Verr., which 
I cannot distinguish from J. marmorata) :— 
1. Wings with complete or nearly complete transverse bands; 
costal cell uniformly brown, darker than most of the wing; 
male abdomen mostly orange —. : : sista 
Wings without complete transverse bands; costal cell either 
* This appears to be identical with the North American Limno- 
phila ultima O.-S., which Alexander has recently made the type of 
Neolimnophila, a new subgenus of Limnophila. 
OS ee 
