British Species of Caddis-flies. 163 
no discoidal cell; three apical forks; two transverse veins about 
the middle placed nearly in a line, and another below these more 
towards the base. Legs long; the intermediate tibize and tarsi 
dilated in the female; anterior tibiae with two short apical spurs ; 
intermediate and posterior tibiz each with two pairs of equal 
spurs. Abdomen short and rather robust. In the male there is 
a horny lobe on the ventral surface of the antepenultimate seg- 
ment, and sometimes a tuft of hairs on the penultimate ; app. sup. 
very small or absent; app. inf. large and spoon-shaped ; the penis 
is furnished with a cover formed of two lateral pieces connected 
by an extensile membrane ; sheaths long and needle-shaped. The 
female has a long extensile ovipositor from which filamentous 
processes can be projected at will. 
Larva inhabiting running waters; apparently gregarious ; ab- 
domen without respiratory filaments, but furnished with hairs. 
Case formed of stones placed irregularly. I have found these 
cases in innumerable quantities covering the lower surface of large 
stones. 
The species are small insects of dull colours, with great external 
similarity of appearance. The anal appendices furnish easily 
recognizable characters, and the neuration should also be carefully 
examined. We possess two species. 
1. Agapetus fuscipes, Curtis. 
(Pl. VIII. fig. 8, neuration ; PJ. XIV. fig. 13, app.) 
Agapetus fuscipes, Curt. (*) Phil. Mag. p. 217, 1 (1834); 
Steph. (*) Ill. p. 156, 2; A. ochripes, Curt. Phil. Mag. p. 
217, 2(1834); Rhyacophila tomentosa, Pict. Recherch. p. 189, 
11, pl. 16, fig. 9 (1834); Agapetus funereus, Steph. (*) Ill. 
p- 156, 1 (1836); Hag. (*) Ent. Ann. 1860, p. 81, 79; 4. 
comatus, Steph. (*) Ill. p. 157, 4 (1836). 
Antennz and palpi blackish-fuscous. Head and thorax black, 
with yellowish hairs. Anterior wings greyish-fuscous, with yel- 
lowish hairy clothing; fringes greyish-fuscous. Posterior wings 
greyish-fuscous, somewhat iridescent, with concolorous fringes. 
Legs fuscous. Abdomen black. In the male there is a long 
curved testaceous horny lobe, placed on the ventral surface of 
the antepenultimate segment, reaching beyond the base of the 
anal appendices, rather dilated at the extremity; app. sup. 
wanting; app. inf. long, dilated at the base, the tips produced, 
dentate internally ; penis-covers straight, with an extensile mem- 
brane between them; sheaths long and needle-shaped, the tips 
M 2 
