British Species of Caddis-flies. 1s 
lines. In the male the upper margin of the last abdominal seg- 
ment is produced in the middle into a short triangular lobe, on 
each side of which are placed the broad, obtuse and very hairy 
app. sup.; app. inf. sharply elbowed, the apical portion directed 
strongly upwards; above the app. inf. there appears to be a large 
triangular upper penis-cover. (In dry specimens the parts are 
confused and not easy to discriminate, excepting the app. inf.) 
Expanse of fore-wings, ¢ 6—7 lines, 9 74—8 lines. 
Not an uncommon species about still waters in summer ; flying 
on calm evenings just above the surface. 
I am not certain if this be really Pictet’s species ; the type in 
the British Museum is much rubbed, and has Jost its abdomen; 
Dr. Hagen informs me that he thinks there may be two closely 
allied species, one smaller than that here described, and probably 
the true lacustris of Pictet. 
I think it probable that the three varieties figured by Kolenat 
(Gen. et Spec. Trichop. pt. 2, pl. 3, figs. 35, 36, and pl. 4, fig. 
37), are distinct species ; fig. 36, perhaps, representing our lacus- 
tris. 
S. notata, which I erroneously recorded in the Ent. Ann. for 1862, 
p. 33, is the male of this species. Rambur’s notata is allied, but 
different. 
4. Setodes testacea, Curtis. (PI. XIII. fig. 4, app.) 
Leptocerus testaceus, Curt. (*) Phil. Mag. p. 213, 13 (1834), not 
of Steph. or Hag. 
Antennz ochreous, marked with blackish at the sutures of the 
articulations above. Head, palpi and thorax ochreous. Anterior 
wings densely hairy, dark ochreous, slightly brownish, the fringes 
greyish at the anal angle; the three transverse veins forming the 
anastomosis rather conspicuously darker than the others, placed 
nearly in a straight line. Posterior wings hyaline, with long grey 
fringes. Legs ochreous. Abdomen greenish; the three or four 
last segments in the male have on each side above a large oval 
space of a different texture, minutely and thickly punctuated ; a 
broad plate, obtusely rounded in front, covers the whole of the 
terminal segment above, and extends far beyond it; this plate is 
of a similar texture to the spaces above mentioned, and is punc- 
tuated in the same manner; app. sup. small, finger-shaped, with 
a lobe between them, beneath which is a large boat-shaped tes- 
taceous piece, which may be considered as the upper penis- 
cover; app. inf. very large, with an oval base; the apical portion 
