British Species of Caddis-flies. 51 
Expanse of fore-wings 10—11 lines. 
Apparently a rare species, frequenting running streams, and ap- 
pearing in summer. I possess it from the neighbourhood of 
London, Folkestone, Ringwood, Dublin, and Rannoch. 
Dr. Hagen’s remarks concerning this species, in his revision of 
Pictet’s Phryganide in the Stett. Ent. Zeit. 1859, p. 140, should 
be cancelled, and reference be made to the same Journal for 
1861, p. 117. 
22. Limnephilus luridus, Curtis. (PI. X. figs. 15, 16, app.) 
Limnephilus luridus, Curt. (*) Phil. Mag. p. 124, 26 (1834); 
L. irroratus, Steph. (*) Hl. p. 223, 32 (1837). 
In form and colour very similar to the two last species; the . 
anterior wings more rounded at the apex, the colour more ochre- 
ous, with fewer freckles, and the veins of the anastomosis con- 
spicuously darker; the discoidal cell scarcely so long as in L. 
hirsutus, but longer than in L. extricatus. In the posterior wings 
the ramus discoidalis forks far before the ramus subdiscoidalis, and 
thus the discoidal cell is much longer than in the other two spe- 
cies. The coloration of the whole insect is generally redder than 
in the allied species. In the male the upper margin of the last 
abdominal segment is truncated; app. sup. very long and thin, 
curved upwards, slightly dilated at the tips; app. intermed. very 
long, straight, not diverging, pitchy black, obtuse at the tips; app. 
inf. scarcely visible ; penis-sheaths very large and long, curved 
strongly upwards, reddish-yellow. In the female there are two 
long thin greyish appendices, which may be called app. sup.; these 
are curved inwards; between these proceed two long, straight, 
needle-shaped, yellowish points (app. intermed.), and below these 
are two concave appendices drawn out into a fine point, their 
bases uniting and forming a tube; on each side are two broadly 
triangular hairy lateral valves (or app. inf.). 
Expanse of fore-wings 11—12 lines. 
I possess this species from the Norfolk fens, Ringwood, West- 
moreland, and Rannoch. Stephens gives the neighbourhood of 
London as a locality. 
In my notes on this species in Ent. Ann. 1862, p. 28, I have 
erroneously described the penis-sheaths as app. inf., and applied 
the name irroratus to L. extricatus (hirsutus, Kol.). See Ent. 
Ann. 1864, p. 148. I know of no other species of this genus in 
which the female has such complicated and highly-developed anal 
appendices. 
E2 
