ELACHISTID ©. 225 
The position of the perfect insects in repose is also rather cha- 
racteristic, for in most of the genera they sit closely appressed to 
the surface on which they rest. 
The individuals of many of the species in this family are ex- 
tremely numerous, making up for their small size by their greater 
numbers; some are rather gaily coloured, but the greater propor- 
tion are variously shaded with grey or black, varied. with white or 
whitish ; ina few the markings are metallic. The perfect insects 
mostly fly at dusk, some may be met with flying in little swarms 
in the afternoon; a few are of retired habits and rarely seen on 3 
the wing. The larvae are most frequently leaf-miners, some few ; 
are however external feeders. They have sixteen feet, though in ’ 
Tischeria the development both of the legs and prolegs is very : 
slight. The pupa is sometimes enclosed in a firm cocoon, some- ; 
times in one of open network, but not unfrequently the pupa is , 
naked, affixed by the caudal extremity, with a belt of silk round 
the middle, like some of the Ruopatocnra; and in Bedellia the 
similarity is still more striking, the pupa being angulated, and like j 
that of a Pzeris in miniature. q 
The genera of this family represented here are fourteen in ; 
number, and may be tabulated in the following way :— q 
a. Posterior wings extremely narrow, almost setiform. 3 
6, Head rough. 1. BrpEura. 4 
6 6. Head smooth. : 
ec. Antenne with long slender hairs. 2. SrarHMopopDa. é 
ec. Antenne naked. - 
d. Basal joint of the antennee long. 3. CosmorTERyYx. 
d d. Basal joint of the antenna short. 4. BarracunpRa. : 
a a. Posterior wings lanceolate or linear-lanceolate. ; 
e. Head rough in front. 5, OrNoPHILA. 
ee, Head smooth. 
J. Anterior wings with projecting tufts of scales from the inner . 
margin, 6. CHAULIODUS. 
J /. Anterior wings with no projecting tufts from the inner margin. 
g. Anterior wings with raised tufts on the disc. 
h. The tufts not metallic. 7. LAVERNA. 
hh. The tufts metallic. 8. CurysociistTa. 
gg. Anterior wings smooth, not retuse below the apex, nor 
posteriorly appearing from the cilia broader. 
z. Labial palpi short and thick. 9. Hentopines. 
z i. Labial palpi slender, of moderate length. 
k. Antenne rather thick. 10, AnyBra. 
kk. Antenne slender, 11. AsycHna. 
g 99. Avterior wings smooth, the costa slightly vetuse. 12. 
Curysocorys. 
VOL. III. 26 
i. 
