British Species of Caddis-flies. 139 
the last segment is beak-shaped, with a rather broad end; app. 
sup. small and obtuse; app. inf. large, the basal joint rather 
shorter than the terminal, the upper portion of the terminal joint 
with the apex curved downwards and rather broad. In the female 
the lateral valves are obtuse. 
Expanse of fore-wings 9—12 lines. 
A common species about small swiftly-flowing streams and 
rivers, especially in mountain districts ; continues all the summer 
and till late in the autumn. 
A nearly allied species is P. variegatus, Scopoli, Brauer, which 
is included in Dr. Hagen’s Synopsis (Ent. Ann. 1861, p. 7, 96), 
but I have not been able to find it either alive or in any of our 
English collections. It differs from P. scopulorum in having the 
antenne wholly yellow; the first apical cell is shorter, and the 
terminal joint of the inferior appendices is narrower and _ less 
obtuse. 
2. Philopotamus scoticus, M‘Lachlan. 
Philopotamus scoticus, M‘Lach. Ent. Ann, 1862, p. 34, fig. 5. 
Antenne brown, annulated with yellow. Head black, clothed 
with golden-yellow hairs. Palpi fuscous. Mesothorax black. 
Anterior wings rich yellow, with numerous, more or less conflu- 
ent, fuscous streaks and blotches; first apical cell not reaching 
the transverse vein closing the discoidal cell. Posterior wings 
purplish-fuscous, the costal and dorsal margins narrowly edged 
with yellow; pterostigma and spots round the apical margin also 
yellow. Legs ochreous, with fuscescent tibiz. Abdomen black. 
Expanse of fore-wings 11 lines. 
I know of only one example, a female, in the collection of the 
British Museum, from Rannoch, Perthshire. It is possible that 
it may be only a highly coloured variety of P. scopulorum, yet 
I have seen no specimens clearly intermediate. If it be a species, 
it is the handsomest in the genus. I did not find it on the occa- 
sion of my visit to Rannoch in 1865; P. scopulorum was there, 
but of the ordinary colour, or perhaps rather darker than southern 
examples, 
3. Philopotamus montanus, Donovan. 
(Pl. IL. fig. 7, larva; Pl. XIII. fig. 22, app.) 
Phryganea montana, Donov. Brit. Ins. vol. xvi. pl. 548, fig. 1 
(1813)? ; Philopotamus montanus, Brauer (*), Neurop. Aust. 
p- 39, fig. 25; Hag. (*) Stett. Zeit. 1860, p. 277, 3; Ent. 
