British Species of Caddis-flies. a8 
The question of the identity of MJ. a/bicornis, Pict., and M. 
cylindrica, Pict., seems difficult to solve. Dr. Hagen mentions 
that he has examined numerous specimens without being able to 
arrive at any decision, acknowledging that the types present no 
seizable characters, an opinion in which I cordially agree with 
him. These types (now in the British Museum) I have carefully 
examined, and can discover no difference whatever; yet Pictet 
describes the larvee of the two as somewhat different. Till it is 
proved to be otherwise, I cannot but think that this may be an 
accidental or ordinary case of variation. 
Genus Moranna, Curtis. 
Antenne scarcely longer than the wings, stout, not serrated 
internally; basal joint thicker, short. Head transversely quadrate. 
Maxillary palpi very hairy; basal joint short; second rather 
longer; third longer than the second; fourth and fifth still longer, 
equal. Labial palpi smail; basal joint short, the others longer 
and equal. Mesothorax robust, ovate. Anterior wings long and 
narrow, hairy clothing not dense, the costal and dorsal margins 
almost parallel, apex rounded; neuration distinct; no discoidal 
cell; the female with an additional forked apical ceil. Posterior 
wings folded, broader than the anterior, the dorsal margin with a 
small lobe-like projection at the extreme base; in the female there 
is an additional forked apical cell, or sometimes two more; cilia 
evilent, long at the anal portion. Legs rather long; anterior 
tibiz with two short apical spurs; intermediate and posterior 
tibia with two pairs of short equal spurs. Abdomen short, 
rather robust; anal appendices complicated. 
In repose the wings are folded round the body. 
Larve inhabiting both still and running waters. Head very 
small, elongated. Pronotum small and transverse, corneous. Me- 
sonotum large, nearly quadrate, the corners rounded. Metano- 
tum stilllarger. (See Pl. II. fig. 14.) Anterior and intermediate 
legs with the joints dilated, the first tarsal joint furnished with 
a very long spur; posterior legs thin, longer than the others, the 
tarsal joint not spurred, Abdomen subcylindrical; the first 
segment with a very large, conical, dorsal protuberance, the lateral 
protuberances nearly obsolete; respiratory filaments in tufts, 
arranged in two rows; anal crotchets small. 
Case composed of fine sand, broad, convex above, flat or slightly 
concave beneath; the upper surface at the superior end is pro- 
duced considerably beyond the mouth, and forms a semicircular 
H 2 
