British Species of Caddis-flies. 135 
rivers, appearing in summer. Along the Thames about Kew and 
Richmond it is found in myriads, taking refuge in the herbage 
on the banks. 
2. Psychomia pheopa, Stephens. (PI, XIII. figs. 18, 19, app.) 
Anticyra pheopa, Steph, (*) Ill. p. 159, 1 (1836); A. graci- 
lipes, Steph. (*) Ill. p. 159, 2 (1836); Tinodes pusillus, Kol, 
Gen. et Spec. Trichop, pt. 2, p. 226, 10 (1859); Psychomia 
pusilla, Hag, (*) Stett. Zeit. 1860, p. 290, 5; P. (Homoe- 
cerus) derelicta, M‘ Lach. Proc, Ent, Soc. 1863, p. 152. 
Antenne blackish-brown, faintly annulated. Head and palpi 
blackish-brown., Anterior wings obtusely rounded at the apex, 
black with a brownish tinge; fringes concolorous. Posterior 
wings blackish, subhyaline, with blackish frmges. Legs brownish- 
testaceous, the tibiz and tarsi darker. Abdomen blackish, paler 
beneath, with testaceous appendices. In the male there proceeds 
a short, acute, somewhat curved lobe from the middle of the upper 
margin of the last abdominal segment; app. sup. long and narrow, 
directed upwards, dilated towards the tips and somewhat hairy ; 
app. inf. nearly as long as the app. sup., directed upwards, appa- 
rently bisarticulate, the basal joint being short, the terminal joint 
long and obtuse; from between the app. inf. projects the obtuse 
and truncated apex of the penis (or upper penis-cover?). In the 
female the apex of the abdomen is furnished with a long and thin 
ovipositor, which is dilated and somewhat flattened at the base, 
the apical portion being directed strongly upwards. 
Expanse of fore-wings 5—6 lines. The females the largest. 
In this country not nearly so common as the last species, 
occurring about rivers in summer and autumn. 
Genus Diptectrona, Westwood. 
Antenne slender, scarcely so long as the wings, distinctly ser- 
rated on the inner side; basal joint short, rather thicker than the 
rest. Head broad and hairy. Ocelli absent. Maxillary palpi 
long; the four first joints of nearly equal length, the basal joint 
the shortest; terminal joint thinner, nearly as long as the others 
united. Mesothorax short and robust. Anterior wings short, 
narrow at the base, but greatly dilated before the broadly ellip- 
tical apex ; hairy clothing short and not very dense; discoidal cell 
short, closed; radius considerably bent before its termination ; 
about four transverse veins towards the apex, and two others 
more towards the base; forks 1, 2, 3, 4 and 5 all present. 
