British Species of Caddis-flies. 67 
3. Halesus annulatus, Stephens. (PI. XI. figs. 11, 12, app.) 
Anabolia annulata, Steph. (*) Tl. p. 231, 4 @ (1837); 2. tes- 
tacea, Steph. (*) Ill. p. 231, 3 (1837); A. flavipennis, 
Steph. (*) Ill. p. 231, 5 (1837), not of Pictet; Halesus flavi- 
pennis, Kol. Gen. et Spec. Trichop. pt. 1, p. 71,5; Hag. (*) 
Ent. Ann. 1859, p. 95, 88; Brauer, Neurop. Aust. p. 47, 
fig. 46, app. ? 
Antenne brown. Head dark brown, with scattered ochreous 
hairs. Palpi reddish-ochreous. Prothorax testaceous, with 
ochreous hairs. Mesothorax dark brown. Anterior wings 
greyish-yellow, rather thickly clothed with short yellowish pubes- 
cence; immaculate, excepting the usual pale dot at the thyridium, 
and a somewhat browner tinge at the pterostigma; neuration 
fuscous; first apical sector extending to about one-fourth the 
length of the discoidal cell. Posterior wings greyish-subbyaline, 
with fuscous veins; the pencil of hairs in the male yellowish. 
Legs ochreous with black spines. Abdomen brownish, the 
margins of the segments paler. In the male the upper margin of 
the last abdominal segment is truncated, with a space covered with 
short black setz in the middle, above which is an oval black swell- 
ing; app. sup. yellow, very small and hairy; app. intermed. not 
visible, but in their place is a short horizontal square plate, with 
an intensely black outer margin; app. inf. short, directed slightly 
upwards, testaceous-black at the acute apex; penis short and ob- 
tuse. In the female the last abdominal segment above is furnished 
with long hairs directed forwards; the lateral valves are large and 
divided at the apical margin, the lower fork longer than the upper, 
Expanse of fore-wings 9—11 lines. 
A not uncommon insect about swiftly running streams with 
a rocky bottom, especially in mountainous districts; appearing 
in summer and autumn. Examples from the North of England 
and North Wales are darker than southern specimens. 
There are several allied continental species ; amongst these may 
be cited H. flavipennis, Pictet, and H. chrysota, Rambur. 
Genus EcciisorTeryx, Kolenati. 
Antenne slender, basal joint stout, scarcely so long as the head. 
Head subtriangular, produced above between the antennz, and 
margined with a row of hairy tubercles. Ocelli very prominent. 
Maxillary palpi in the male with the first joint short, second and 
third of nearly equal length; in the female the basal joint is short, 
second and fourth longer, of nearly equal length, third and 
F2 
