172 GLYPHIPTERYGID &. 
rather gregariously, there being generally twenty or more on one 
plant. : 
4. Betulella, Curt. B. BE. fo. 679 (1888). 
Taken by Mr. Dale on birch-trees at Castle Eden Dene, in Au- 
gust; unique in his collection. 
Genus II. ROSLERSTAMMIA. 
Rislerstammia p., Zell. Isis, 1839. p. 202; Dup. ddela p., Treit. 
Capilli in occipite et vertice hirsuti, ceterum decumbentes. Ocelli nulli. 
- Antenne crassiuscule, filiformes, microscope pubescente-ciliate, cor- 
pore longiores. Haustellum mediocre, nudum. Palpi labiales, fili- 
formes, mediocres, penduli vel subporrecti, articulo tertio preecedentem 
longitudine et crassitie subeequante, acuto. Ale oblong, posteriores 
ovate, ciliis mediocribus; anteriores: vena apicalis furcata, infra 
eam rami 5 inter se distantes; cellula secundaria bene indicata ; sub- 
medianze apex inerassatus; vena subdorsalis longe furcata; poste- 
riores: cellula costalis elongata; vena apicalis ‘simplex, infra eam 
ven dug simplices; venee discoidalis rami duo ultimi furcam for- 
mant. 
The crown and back of the head rough, the remainder with decumbent 
scales. Ocelli none. Antennee rather thick, filiform (viewed through 
a lens, with pubescent ciliations), Zonger than the body. Tongue of mo- 
derate length, naked. Labial palpi filiform, of moderate length, droop- 
ing or rather porrect ; the third joint nearly equal in length and thick- 
ness to the second, pointed. Wings oblong, the posterior ovate, with 
moderate cilia. In the anterior wings the apical vein is fwrcate, below 
it are five veins at equal distances ; the secondary cell is well indicated ; 
the apex of the submedian vein is thickened ; the subdorsal vein has a 
long fork. In the posterior wings the costal cell is elongate; the 
apical vein is simple, below it are two simple veins; the two last 
branches of the discoidal vein form a fork. 
There is only one species in this genus, which has some resem- 
blance to an Adela. 
1. Erxlebella, Fab. Man. ii. 256. 27 (1787).—fusco-cuprella, 
Haw. ; Step.—chrysitella, Treit.—encella, Dup.?—Hralebeniella, Lie- 
nig? Alis anticis nitide cupreis, dorsum versus dilutioribus. xp. al. 
6% lin. 
Head dark yellow. Face and palpi pale yellow. Antenne black, a 
short space before the apex white. Anterior wings bright-coppery, to- 
wards the inner margin rather paler; cilia coppery-grey. Posterior 
wings violet-fuscous, with paler cilia. 
Appears in June, on heaths, but hitherto very scarce. (Ac- 
