72 Mr. R. M‘Lachlan’s Monograph of the 
scarcely reaching the anastomosis. Posterior wings hyaline, 
yellowish towards the apex and with testaceous veins. Legs 
dark testaceous with black spines, the tarsi fuscescent. Abdomen 
greyish-fuscous. In the male the upper margin of the last abdo- 
minal segment is produced in the middle into a short rounded 
Jobe, bent under and covered with short black setze; app. sup. 
small and rounded; app. intermed. broad, flat and acute, 
curved very strongly upwards, the tips shining fuscous; app. inf. 
curved upwards, rather acute, testaceous, with long hairs. In the 
female the superior valves appear to be united into a very deeply 
emarginated tube, the lateral pieces of which are greatly produced 
and obliquely truncated ; the opening of the tube very large. 
Expanse of fore-wings 6—12 lines. The females always the 
largest. 
Larva: Head and thorax of a bright fawn-colour, mixed with 
black spots. Mesonotum with a black line on all sides. Meta- 
notum with four scaly points. Abdomen greyish fawn-coloured, 
the first segment darker and with fewer respiratory filaments than 
the others. Feet of a clear brown. (Pictet.) 
Case composed of pieces of leaves and wood, disposed Jongitu- 
dinally and irregularly. (Pictet.) 
Frequents running streams, and appears in September and 
October; common in various parts of England, especially in the 
Lake district. 
In the “ Entomologist’s Annual,” 1859, p. 96, Dr. Hagen gives 
two species as natives of this country, viz., C. villosa, Fab., Pict., 
Kol., and C. tuberculosa, Pict. As I have before remarked, I 
cannot admit that we have two species. In Stephens’ Collection 
there are six males and four females, all labelled villosa, whilst 
there is not a single specimen placed as brevipennis, although in 
the “ Illustrations” it is said to be a common species. It would 
seem probable, therefore, that Stephens discovered afterwards 
that brevipennis of Curtis was a very different insect, and referred 
his species to villosa. ; 
With respect to the other described species of this genus, Dr. 
Hagen informs me that C. fusca, Brauer, differs from all the others 
in having the app. intermed. forked in the male, and on the ventral 
surface of the antepenultimate segment in the female there is a 
transverse row of strong black spines, little visible in the male. 
In what has been considered as C. villosa of Fabr. by Kolenati 
and Brauer (and perhaps Pictet’s species is the same), the app. 
inf. of the male have a long cylindrical process, and the females 
are apparently considerably smaller than the males. C. rugulosa, 
