British Species of Caddis-flies. 145 
1. Polycentropus flavomaculatus, Pictet. 
(Pl. VIII. fig. 1, neuration; Pl. XIII. figs. 26, 27, app.) 
Hydropsyche flavomaculatus, Pict. Recherch. p. 220, 29, pl. 19, 
fig. 2 (1834); Polycentropus flavomaculatus, M‘Lach. Ent. 
Mo. Mag. vol. i. p. 27; P. irroratus, Curt. (*) Brit. Ent. 
p- 554 (1835); Steph. (*) Ill. p. 178, 7; Hag. (*) Ent. Ann. 
1861, p. 3, 88; P.pyrrhaoceras, Steph. (*) ill. p. 177, 3 (1836) 5 
P. fuliginosus, Steph. (*) Ill. p. 177, 4 (1836); 2. concinnus, 
Steph. (*) Ill. p. 178, 5 (1836); P. trimaculatus, Steph. (*) 
Ill. p. 178, 6 (1836); P. subpunctatus, Steph. (*) Ill. p. 177, 
1 (1836), part. 
Antenne brown, annulated with yellowish. Head fuscous, 
clothed with pale golden-yellow hair. Palpi fuscous. Meso- 
thorax dark blackish-fuscous. Anterior wings fuscous, with 
numerous small golden-yellow spots; some of these on the costal 
margin are rather larger than the others; apical margin regularly 
spotted. Posterior wings smoky-grey, with greyish fringes. Legs 
testaceous, the thighs fuscescent. Abdomen blackish-fuscous, 
paler beneath. In the male there is a broad membranous lobe 
from the middle of the upper margin of the last segment, the apex 
of which is somewhat dilated, truncated and excised; from be- 
neath this lobe proceed the app. intermed., which are somewhat 
claw-shaped, and widely divergent; app. sup. small, broad and 
very obtuse ; app. inf. large, slightly concave and broadly rounded 
at the apex. 
Expanse of fore-wings, $ 7 lines, 9 9 lines. 
A common species, frequenting streams, appearing at the end 
of spring, and continuing all the summer. It is very abundant 
in the metropolitan district. 
2. Polycentropus multiguttatus, Curtis. (Pl. XIII. fig. 28, app.) 
Polycentropus multiguttatus, Curt. (*) Brit. Ent. p. 544 (1835)?; 
Hag (*) Ent. Ann. 1861, p. 4, 89; M‘Lach. Ent. Mo. 
Mag. vol. i. p. 27; Plectrocnemia irrorata, Brauer (*), 
Neurop. Aust. p. 40 (1857); P. atomaria, Kol. Gen. et 
Spec. Trichop. pt. 2, p. 212, pl. 1, figs. 10, 11 (1859). 
Antenne brown, annulated with yellow. Head fuscous, with 
pale golden-yellow hairs. Palpi dark testaceous. Mesothorax 
dark fuscous. Anterior wings fuscous, thickly sprinkled with 
golden-yellow spots; some of these on the costal margin are 
larger than the others, and alternate with large spaces of the dark 
VOL. V. THIRD SERIES, PART I.—ocT. 1865. L 
