142 Rev. A. E. Eaton on 
Koni2;sbiii'g (sp. dub. Hag. letter to M'Lach.), Italy and 
Madeira; also Tlie Netherlands. 
Orthotrichia angustella. 
PI. II. 4 — 4 a, neuration $ $ ; III. 7 — 7 c, genitalia $ . 
Hydrojjtila angustella, M'Laclilan, 1865. 
Head and protliorax witli wliitisli or tow-coloured hair ; 
palpi very pale testaceous; antennas pale fawn-colour, 
sometimes Avitli a very narrow whitish ring just before the 
tip, at other times with three black rings separated by 
Avhitish spaces, one ring near the tip, the others between 
it and the middle. Anterior wings black, with glossy 
pale tow-coloured markings, viz. : $ , the inner margin, an 
indistinct fascia before the middle, which is preceded by 
some faint streaks along the disk ; after this is a large costal 
spot subtended by an oblique longitudinal streak on the 
disk Avhich enters the terminal fringe and is itself sub- 
tended by another shorter streak which reaches but does 
not enter the fringe ; after this come two pairs of op]iosite 
spots in the fringes, sometimes more or less confluent 
across the disk ; and last of all the extreme tip of the Aving ; 
in the $ the discal markings are very indistinct or absent, 
the fringes (especially where the costal blotch should be) 
and the indistinct fascia only are conspicuously jiale. Pos- 
terior wings gray. Legs very pale testaceous with glossy 
hair. Abdomen green, with pale joinings, the bases of the 
segments darker, each segment with a dorsal pair of dark 
subquadrate or oval blotches; the appendices infcriores 
slightly ascending, triangular, flat, and incurved ; penis 
exserted from an oval hump adpressed to one side of which 
is an acute blade-like process curved upwards ; there is a 
setiform sheath, and the apex of tlie penis is thickened 
and incised ; in the female there is a slight apical projection 
beneath the penultimate segment. 
Length with closed wings $ 3* — 3*5, $ 4*5 mm. 
Hab. — Standing Avater and slow streams in the south 
of England; common at Kingwood along the bridges. 
l\[ay, .Tune, July. Bellagio, Lago di Corao, August. The 
Netherlands. 
Orthotrichia atra. 
Ilydroptila atra, Hag. 1865. 
" Capite ct thorace atris ; antennis unicoloribus atro- 
fnscis; alis brunneis, fusco-i)ilosis, griseo-fimbriatis ; pedi- 
bus fuscis, tlbiis pcjstiois griseo-fimbriatis." 
" Long, cum alls 2^ mill. ; exp. alar. 5 mill," 
