British Species of Caddis-flies. 159 
terior wings pale golden-brown, with scattered ashy-grey spots 
and an ashy-grey transverse band before the apex; a silvery- 
white spot at the thyridium, and another below it ; towards the 
base are some short blackish streaks, the outer ends of which 
mark the inner edge of the very ill-defined dorsal blotch; apical 
margin spotted with grey at the terminations of the apical veins ; 
pterostigma yellowish-brown; veins fuscous; the female is 
smaller, with much narrower wings, pale fuscous, with ashy-grey 
irrorations, one or two silvery spots below the thyridium, and 
short blackish streaks near the base. Posterior wings greyish, 
with a faint yellowish tinge, subhyaline ; pterostigma, and the 
apical veins, brownish. Legs pale testaceous; anterior and inter- 
mediate tibize with a broad fuscous ring at the apex, the tarsi 
pale brownish. Abdomen fuscous above, ochreous beneath ; 
appendices testaceous. In the male the lobe from the upper 
margin of the last segment is very short and truncated, with a 
straight channel-like depression in the centre, apical margin 
excised; app. sup. very small, only the broad apices visible; 
app. inf. with long basal joint, with the apex truncated and the 
edges turned inwards, apical joint shorter, the apex deeply di- 
vided, forming two teeth, of which the lower is the larger and 
more obtuse, the upper smaller and acute; sheaths very long 
and curved upwards. In the female the truneated margins of 
the valves are regularly excised. 
Expanse of fore-wings 9—12 lines. 
This pretty species occurs commonly in autumn in South Devon 
along all the streams having their origin on Dartmoor, such as 
the Meavey, Yealm, Erme, Teign, &c. I have also found it 
along the River Ceiriog at Chirk, North Wales, and near Bala. 
Of the female I have seen but two examples. 
The other described European species belonging to this section 
differ considerably from R. munda. R. aurata, Brauer, possesses 
a long superior lobe, and widely diverging prongs to the terminal 
joint of the app. inf. R. venusta, Pict. MS. (from Curtis’ collec- 
tion of Pictet’s types) is very similar to aurata in general appear- 
ance, but the prongs of the app. inf., although distant, are nearly 
parallel ;* this species is in the Brit. Mus., taken by Dr. Leach 
* The pupa figured by Pictet in his ‘‘ Recherches,’ pl. 15, fig. 1°, evi- 
dently belongs to R. venusta, and not to R. vulgaris, to which he refers it. 
The same remark applies to the figure of the appendices, pl. 4, fig. 29. 
In the explanation of the figures on plate 4, fig. 29 is said (perhaps acci- 
dentally) to represent the last segment of the female pupa, and fig. 30 that of 
the male, whereas the converse is truly the case. 
