103

British Species of Caddis-flies.

ferent facies to the rest of the genus, the thorax being less hairy,and the posterior wings more decidedly triangular.

2. Leplocerus grossus, M'Lachlan. (PI. XII. fig. 11, app.)

Leplocerus grossus, Stepb. (*) Cat. p. 320, 3G44 (1829);M‘Lach. Ent. Ann. 1862, p. 31 ; L. cinereus, Steph. (*)Ill. p. 199, 17 (1836), not of Curtis Hag. (*) Ent. Ann.1860, p. 69, 58; L. notalus, Hag. (*) Stett. Zeit. 1858,p. 122, not Mystacida notata, Ramb.

Antennae pale brown, annulated with whitish almost to theapex. Head very thickly clothed with browish-ochreous hairs.Palpi brown. Mesothorax dark brown, with two rows of ochre-ous hairs above. Anterior wings with the apex dilated andobliquely truncated, pale reddish-brown, not thickly clothed,anal spot paler (but scarcely visible in dead examples) ; neurationdistinct, fuscous. Posterior wings subhyaline, greyish, with yel-lowish anal fringes. Legs ochreous, the apices of the tarsal jointsin the four anterior legs brownish. Abdomen dark brown, withpale ochreous lateral lines. A small triangular plate from themiddle of the upper margin of the last abdominal segment in themale, on each side of which are placed the very large, broad andacute, somewhat triangular, yellow' app. sup. ; app. inf. small,curved inwards. (I have not been able to examine fresh speci-mens.)

Expanse of fore-wings 11—15 lines.

A few specimens have been taken by Mr, Wormahl at RuislipReservoir, Middlesex, and I also possess it from the Fen District.It is the largest British species. I have adopted Stephens’Catalogue name solely to avoid giving a new one, though Ste-phens afterwards misapplied Curtis’ name cinereus to this species.The description of cinereus in Ent. Ann. 1860, p. 69, also belongshere.

3. Leplocerus fulvus, Rambur. (PI. XII. fig. 12, app.)

Mystacida fulva, Ramb. Hist. Nat. Nevrop. p. 509, 3 (1842);.Leptocerus fulvus, M‘Lach. Ent. Ann. 1862, p. 31 ; Mysta-cides ochraceus, Kol. Gen. et Spec. Iricbop. pt, 2, p. 250, 2,pi. 3, fig. 27 (1859), not of Curtis.

Antennae pale ochreous, with brownish annulations along two-thirds of their length. Plead densely clothed with yellowish-ochre-ous hairs. Palpi brown. Mesothorax brown, with a few ochreoushairs. Anterior wings brownish-ochreous, the extreme costalmargin and an anal spot (indistinct in dead examples) yellowish ;