British Species of Caddis-flies. 71 
rounded, inferior margin not excised ; cilia evident ; discoidal cell 
similar to that in the anterior wings, apical cells narrow. Legs 
rather long, tibiz and tarsi strongly spinose ; anterior tibize in the 
male without a spur, in the female with one rather long apical 
spur; intermediate and posterior tibiz in both sexes with one 
median and two rather long and nearly equal apical spurs. Ab- 
domen robust, especially in the female; in the male the terminal 
segment has short and broad superior appendices, upcurved and 
hook-shaped intermediate appendices, and rather long and very 
hairy inferior appendices; the penis-sheaths appear to be united 
into a boat-shaped cover, notched at the extremity, and in which 
lies the very small penis; in the female the terminal segment bas 
a large convex superior piece, closing round and forming an open 
tube. : 
Larva inhabiting clear running water. Case a slightly curved 
cylindrical tube, composed of vegetable matters and stones inter- 
mixed, and temporarily fixed. When the larva is about to change 
to a pupa, it closes its case with larger stones. 
All previous writers have represented that the anterior tibiz are 
furnished with a spur in both sexes, a mistake that has evidently 
arisen from the fact that in the male the anterior tibize in dead 
specimens are always strongly pressed against the thighs, unless 
the legs have been stretched out whilst drying. 
The species are somewhat difficult to separate, and I can only 
satisfy myself as to the existence of one in this country. 
1. Chetopteryx tuberculosa, Pictet. 
(PI. IV. fig. 8, neuration and palpi; Pl. XI. figs. 16, 17, app.) 
Phryganea tuberculosa, Pict. (*) Recherch. p. 140, 9, pl. 7, fig. 4 
(1834); Chetopteryx tuberculosa, Kol. Gen. et Spec. Trichop. 
pt. 1, p. 73, 2; Hag. (*) Ent. Ann. 1859, p. 96, 39; C. vil- 
losa, Steph. (*) Ill. p. 233, 1 (1837), not of Fab.?, Pict. ?, 
Kol.; C. brevipennis, Steph. Ill. p. 233, 2 (1837), not of 
Curt. ; Limnephilus echinata, Curtis (*), Coll. 
Antenne reddish-brown. Head dark reddish-brown, a blackish 
mark towards the base of the antennze. Palpi reddish-testaceous. 
Prothorax reddish-brown, with a few long blackish hairs. Meso- 
thorax reddish-brown, darker at the sides. Anterior wings brown- 
ish-yellow, clothed with long brown hairs both on the membrane 
and on the veins; veins yellow; cilia pale yellow; the granulations 
in the apical cells are usually placed singly towards the base, in 
two irregular rows in the middle portion, and often three or four 
together near the margin; first, second, third and fourth apical 
cells broad and nearly equal, fifth narrower and acute, sometimes 
