Mr. F. W. Edwards on British Limnobiidae. 223 
also has nearly always (in the male only) a very distinct 
spur a little before the tip on the lower side, which is at 
most faintly indicated in the other species. A collection 
made at Brodick, Arran, shows almost the complete range 
of wing-markings, some being of the typical marmorata 
type, others like submarmorata and verralli ; one has the 
markings identical with those of mundata except for the 
absence of a dark border to vein Ry , ;; one exceptionally 
pale specimen has no markings except for the stigma, the 
clouded cross-veins, and a small spot near tip of Ax. 
All these have identical hypopygia; the claspers are 
shown-in Pl. IT. fig. 20. 
LIMNOPHILA. 
This genus has recently undergone some further sub- 
division. Alexander has revived the genus Pilaria, to 
which belong L. discicollis Mg., L. fuscipennis Mg., and 
L. subtincta Zett.; and has proposed the name Pseudo- 
limnophila for the group which includes L. lucorum Me., 
and L. sepium Verr. Both these imnovations seem to be 
quite justified, and it is not unlikely that some further 
division may be made in the future; L. ochracea Mg., can 
hardly be left permanently in Limnophila. Of the two 
genera above mentioned, Pilaria is distinguished by 
peculiarities of venation and genital tube, and by the 
habits and morphology of the early stages ; Psewdolimnophila 
chiefly by the shape of the head, the back part of which 
is narrowed and produced into a sort of neck, a character 
which it shares with Poecilostola ; possibly Poecilostola and 
Pseudolimnophila may eventually be merged, but so far as 
the British species are concerned there are striking differ- 
ences in the hypopygium and wings.* 
L. abdominalis Staeg. Males of this species have occurred 
at Aberfoyle, Perth, 28 viii. 1906 (Carter), and Austwick, 
near Ingleborough, 5 vi. 1920 (Cheetham). The black thorax 
and black bands on the orange abdomen will distinguish 
it at once from L. bicolor and L. punctum. 
L. robusta Wahlgren. There is a female of this species 
in the British Museum from Studland, Dorset, 1 ix. 1906 
(Yerbury), and I have seen another from Blairgowrie, 
Perth, vi. 1913 (Carter). It is remarkable for its unusually 
* Tn this connection it is worth mentioning that specimens of 
P. punctata are sometimes to be found without any trace of wing- 
markings, 
