British Species of Caddis-fties. 115 
2. Mystacides nigra, Linné. 
(PI. II. fig. 6, larva; Pl. VI. fig. 5, neuration and maxillary 
palpus; Pl. XII. figs. 29, 30, app.) : 
Phryganea nigra, Linn. Faun. Suec. n. 1490 (1761), and other 
works ; Mystacides nigra, Lat. Fam. Nat. p. 437; Pict. (*) 
Recherch. p. 169, 10, pl. 12, fig. 5; Ramb. Hist. Nat. Névrop. 
p- 511, 8; Hag. (*) Ent. Ann. 1860, p; 75, 72; MM. niger, 
Burm. Handb. p. 919, 5; Leptocerus niger, Steph. {*) Ill. 
p- 196, 6 (part); Phryganea azurea, Zett. Ins. Lapp. col. 
1072, 52 (1840); Setodes azurea, Kol. Gen. et Spec. Tri- 
chop. pt. 2, p. 263, 1, pl. 3, fig. 33. 
Antenne black, distinctly annulated with white on the basal 
half. Head and thorax shining black. Palpi dull black. Eyes 
dull red in the living insect. Anterior wings narrower than in 
the last species; metallic bluish-black, with a dull darker 
central oblique fascia; fringes dark greyish-black. Posterior 
wings dark smoky-grey, with concolorous fringes. Legs blackish, 
with a silvery reflexion in certain lights; tarsi annulated with 
darker. Abdomen dull blackish. In the male the app. sup. are 
very slender, black and slightly hairy ; app. intermed. testaceous, 
curved, very acute, the points crossing; app. inf. broad at the 
base, with a short obtusely rounded lobe directed upwards; ven- 
tral plate very large, broad and pubescent, produced in the middle 
into a lobe which is forked at the end, the branches being long 
and widely divaricating. In the female. there is a short mem- 
branous median superior lobe, with a semicircular emargination, 
and on either side a fine straight finger-shaped appendage ; lateral 
valves narrow at the base, the apical portion greatly dilated and 
somewhat truncated. 
Expanse of fore-wings 63—8 lines. - 
Larva resembling that of the preceding, but smaller and with 
the black spots covering to a greater extent the pale ground 
colour. (FPictet.) 
Case similar to that of the last. (Pictet.) 
A common and very elegant species, appearing in summer and 
autumn. 
Leptocerus sepulchralis, Walker, from North America, is very 
closely allied to, or identical with, AJ. nigra. The types are 
unset and in bad condition; the form of the ventral plate in the 
male appears to differ slightly, but I am not satisfied that there 
is any good specific difference. 
12 
