British Species of Caddis-flies. 69 
dots on the anterior wings are often absent, excepting those at 
the thyridium and arculus. 
Genus PuacoprEryx, Kolenati. 
Antenne very stout towards the base, narrowing gradually ; 
basal joint as long as the head. Head with the angles somewhat 
rounded, almost smooth, but with a tuft of hairs between the 
antennae, Maxillary palpi in the male with short basal joint, 
second and third of nearly equal length, subcompressed ; in the 
female with short basal joint, second, third and terminal joints of 
nearly equal length, fourth rather shorter. Labial palpi with 
short, broad and flattened basal joint, second joint rather longer, 
thin, terminal joint still longer. Prothorax distinct, hairy. Meso- 
thorax broader than the bead, rather angular at the sides, nearly 
smooth. Anterior wings short, scarcely dilated towards the ob- 
liquely rounded apex ; apical margin with a shallow sinuation at 
the termination of each apical sector; the whole of the mem- 
brane, with the exception of the costal and dorsal margins, is dis- 
tinctly granulated, and from each granulation springs a short 
decumbent hair; the cubitus posticus and its branches have 
longer somewhat erect hairs; neuration strong, radius with a 
scarcely perceptible bend, discoidal cell long and narrow, apical 
cells all broad, but the first and fifth broader than the others. 
Posterior wings hyaline, slightly broader than the anterior, pos- 
terior margin excised, discoidal cell similar in form to that in the 
anterior wings. Legs rather short, tibize and tarsi strongly 
spinose ; anterior tibize with one apical spur; intermediate tibiz 
with one median and two equal apical spurs; posterior tibize with 
two short median, and two longer equal apical spurs. Abdomen 
robust, laterally compressed ; terminal segment in the male fur- 
nished with very large angular superior appendices ; intermediate 
appendices very broad, triangular; inferior appendices small; pe- 
nis-sheaths hairy; in the female the terminal segment has two 
superior, and two lateral, rounded valves. 
Larva unknown; probably inhabiting standing waters. 
At present there is known only one species of this genus. The 
short distinctly granulated wings, with depressed hairs, are very 
characteristic. 
1. Phacopteryx brevipennis, Curtis. 
(Pl. I. fig. 3; Pl. LV. fig. 7, neuration; Pl. XI. fig. 15, app.) 
Limnephilus brevipennis, Curt. (*) Phil. Mag. p. 125, 33 (1834) ; 
Phacopteryx granulata, Kol. Gen. et Spec. Trichop. pt. 1, 
p- 59, 1 (1848). 
Antenne reddish-brown, with slightly darker annulations, 
