British Species of Caddis-flies. 49 
At present I cannot but consider that it is a little doubtful, yet I 
am unable to refer the specimen to any other British species. It 
is to be hoped that further acquaintance with these insects will 
throw additional light on this matter. 
The description in Ent. Ann. 1859, p. 86, belongs to L. ignavus, 
Hag., which is certainly not identical with flavescens. 
19, Limnephilus ignaous, Hagen. (PI. X. fig. 6, app.) 
Limnophilus ignavus, Hag. (*) Stett. Zeit. 1858, p.116; L. 
Jflavescens, Hag. (*) Ent. Ann. 1859, p. 86, 24 (not of 
Steph.) 
Antennz reddish-testaceous, with indistinct paler annulations. 
Head and thorax reddish-brown. Anterior wings pale reddish- 
brown, with indistinct paler irrorations most evident along the 
costal margin and at the apical portion ; pterostigma darker; a 
pale-whitish dot at the thyridium, and another below it. Posterior 
wings hyaline, pale brown at the apex, and with brownish veins. 
Legs reddish-testaceous, with black spines ; the tips of the tibize 
and of the tarsal joints blackish. Abdomen greyish-ochreous. 
In the male the upper margin of the last abdominal segment is 
slightly produced in the middle; app. sup. small and obtusely 
rounded ; app. intermed. short, broad and triangular, black; app. 
inf. prominent, irregularly and obtusely spoon-shaped, testaceous, 
with a few long marginal blackish hairs. Sometimes the anterior 
wings are entirely without paler irrorations. 
Expanse of fore-wings 10 lines. 
Of this species I know only two British specimens; one in 
Curtis’ Collection, mixed up with Z. luridus ; the other in my 
own Collection, formerly in that of Mr. Weaver, and probably 
taken by him in Scotland. 
I have yet another species belonging to this group, but unfor- 
tunately only a single female specimen, from which I cannot draw 
up a satisfactory description; it is from the Norfolk fens, 
(2.) Apical margin less sharply truncated, somewhat rounded ; 
hairy clothing more dense. (Corresponds to Desmotau- 
hus, Kolenati.) 
20. Limnephilus extricatus, M‘Lachlan. (PI. X. figs. 11, 12, app.) 
Desmotaulius hirsutus, Kol. Gen. et Spec. Trichop. pt. 1, p. 
57, 3 (1848), (not Ph. hirsuta of Pict., 1834); Limnophilus 
hirsutus, Hag. (*) Ent. Ann. 1859, p. 87, 25. 
Antennz fuscous, with testaceous annulations. Head reddish- 
VOL. V. THIRD SERIES, PART 1.—ocT. 1865. E 
