British Species of Caddis-flies, 133 
hairy; app. inf. with an oval basal joint and a forked terminal 
one, the upper prong very long and curved, the lower bristle-like ; 
below the app. intermed. is a long, curved upper penis-cover.* 
E:xpanse of fore-wings 6—6} lines. 
I have taken this in summer by a small streamlet in the Warren 
at Folkestone, but do not know for certain of other localities. 
The description of the appendices is made from dead examples, 
but will probably be found pretty correct. 
This and the next may be readily separated from the group to 
which durida belongs, by the more obtuse and more densely hairy 
anterior wings; and the palpi appear to be proportionably longer. 
3. Tinodes assimilis, n. sp. (Pl. XIII. fig. 16, app.) 
In size and form almost entirely similar to the last; differs in 
the structure of the appendices. The lobe from the upper 
margin of the last abdominal segment is very similar but shorter ; 
the app. intermed, the same; app. sup. much more dilated at the 
base ; the basal joint of the app. inf. broad, obovate ; the terminal 
joint thin and bristle-like; from the lower side of the base of the 
app. inf. (perhaps united to it) proceeds a long, curved, cylin- 
drical process, the apex of which is directed inwards and 
downwards. 
I have seen but few specimens; I possess it from Haslemere, 
and from a locality now unknown to me. 
The differences in the structure of the appendices seem to 
indicate with certainty that the species is good. 
It is right to mention that at the time I examined Curtis’ 
Collection I was not aware of the existence of this species, but 
I think nevertheless that I rightly determined his pusillus. 
Genus Psycuomta, Latreille. 
Antenne short and thick, about half the length of the wings; 
the two first joints stouter than the rest. Head small and hairy. 
Ocelli absent. Maxillary palpi not very long; basal joint short, 
each of the three following about twice the length of the first, 
dilated and flattened; the fifth thinner, scarcely so long as the 
two preceding joints united. Mesothorax moderately robust, 
* T. cinerea, Hagen, from Madeira, is very closely allied to this, and per- 
haps may not be specifically distinct. In the types of that species I do not, 
however, see the lower bristle-like branch of the inferior appendices; but the 
specimens are gummed on card, and difficult to examine satisfactorily. See 
** Entomologist’s Monthly Magazine,” vol. ii. pp. 78, 79. 
