78 Mr. R. M‘Lachlan’s Monograph of the 
blotches are most conspicuous during life ; sometimes the whole of 
the anterior wings in the female is blotched and spotted with 
grey. Posterior wings dark fuscous. Abdomen dull blackish, 
with testaceous appendices. In the male the prongs of the app. 
intermed. appear to vary slightly in length, sometimes the upper 
is rather the longer, sometimes the lower, and occasionally they 
are equal; the penis-sheaths are thickened and incurved at the 
tips; the triangular plate between the sheaths short and obtuse. 
Expanse of fore-wings 9—14 lines. 
Larva with the head and pronotum chestnut-brown ; the latter 
with a clearer central line; meso- and meta-nota and abdomen 
citron-yellow ; legs fawn-coloured. (Pictet.) 
Common everywhere about running streams; appearing in 
summer and autumn. 
There is a possibility that two species may be here united, and 
that one of them is the S. mulliguttatum of Pictet and Hagen, but 
I have failed to discover any difference by which to separate 
them, save a very slight variation in the length of the prongs of 
the app. intermed. Nevertheless I have seen European species in 
which these sheaths furnish good specific characters. 
Genus Noriposra, Stephens. 
Antenne slightly shorter than the wings, the basal joint thick 
and short. Maxillary palpi in the males small, bent upwards, not 
forming a mask, without long internal hairs; labial palpi long, 
the joints of nearly equal length. In the female the maxillary 
palpi have a short basal joint; second much longer and thicker 
than the others; fifth very short. Anterior wings narrow at the 
base, the apex obtusely rounded, hairy covering close, discoidal 
cell small and closed, the first apical cell reaching almost to its 
base. Posterior wings shorter than the anterior, and of about the 
same breadth ; discoidal cell closed ; cilia, especially the basal, 
long. Legs rather short; anterior and intermediate tibize with two 
rather long apical spurs ; posterior tibiae with two pairs of rather 
long equal spurs. Abdomen subcylindrical in the male, broad 
and somewhat depressed in the female. Male provided with small 
superior and large hairy inferior appendices; in the female the 
apex of the abdomen forms a large open pouch. 
Larva probably similar to that of Sericostoma. Case a cylin- 
drical slightly curved tube, composed of sand and very small 
stones agglutinated together ; closed at each end with vegetable 
débris, when the inmate is in the pupa state. 
We possess only one species of this genus. 
