British Species of Caddis-flies. 129 
app. inf. blackish, the first joint slightly dilated at the apex, the 
apical joint of nearly uniform thickness; penis shining blackish, 
slightly contracted behind the thickened divided apex. 
Expanse of fore-wings 9—12 lines. 
Larva: Head and two first thoracic segments dark fuscous; a 
pale ring encircling the eyes, and two pale oblique spots on the 
disc of the head ; lateral and posterior margins of the mesonotum 
bordered with black, the posterior margin three-lobed, the middle 
lobe the smallest. Metanotum dirty-whitish, with a broad nearly 
quadrate brown corneous plate, the posterior edge of which is 
concave. Legs yellowish, marked with black at the joints. Ab- 
dominal segments dull brown, the three terminal segments paler, 
the peduncles bearing the anal crotchets pale ochreous, with a tuft 
of long black hairs at the base of the crotchets. 
Not an uncommon species about streams, appearing from May 
to October. Especially abundant along the little river Ravens- 
bourne, about Lewisham, &c. 
The types of H. fulvipes of Curtis are two females, which are 
more distinctly irrorated than is usual in this species ; nevertheless 
I have little doubt that they belong here. 
5. Hydropsyche contubernalis, n. sp. (Pl. XIII. fig. 12, app.) 
Antenne whitish, brown towards the apex, the oblique black 
streaks very conspicuous on the basal portion. Head _ thickly 
clothed with silky whitish pubescence. Palpi brown. Mesothorax 
black, with a median line of whitish pubescence. . Anterior wings 
brown, thickly irrorated with whitish spots; a large whitish spot 
on the dorsal margin towards the apex, preceded by a long brown 
space; apical fringes greyish-brown, interrupted with whitish. 
Posterior wings grey, with grey fringes, the neuration hardly 
darker. Legs pale fulvous. Abdomen black, with broad reddish 
or whitish lateral lines. In the male the superior horny lobe is 
short and black, the membranous parts beneath it yellowish ; app. 
sup. very small, obtuse and blackish ; app. inf. with the first joint 
thin and cylindrical, much dilated towards the apex, testaceous, 
the apical portion blackish-brown externally, apical joint cylindri- 
eal, hardly dilated, pale yellow; penis shining deep brownish- 
testaceous, cylindrical, the apex scarcely thickened and slightly 
cleft, without any apparent lateral subapical projections, 
Expanse of fore-wings 8—9} lines. 
I have found this species commonly in summer and autumn 
along the Thames, between Kew and Richmond, and am unable 
VOL, V. THIRD SERIES, PART I,—-ocT. 1865, K 
