42 SOPLIA ZEYLANICA. 
When however the chitinous cuticle is very thin, it is impossible 
to avoid shrinkage if the object is mounted in Canada balsam ; 
in such cases it should be transferred from the water into glycerin. 
For permanent glycerin preparations the following is the best 
method :—The cover-glass, over which no glycerin must be allowed 
to escape, is fastened to the slide by means of a rim of wax which 
is applied by a wax taper or wax match which has been lighted and 
immediately extinguished ; the wax border can then be covered over 
with Canada balsam or gold size. 
Teasing up the object with needles can only be effected success- 
fully in Canada balsam or glycerin. 
In dealing with delicate objects, the dilute caustic potash should 
not be heated, as the chitin is liable to change to a tenacious sub- 
stance which will cling to the needles used in the preparation. 
GEOGRAPHICAL DISTRIBUTION. 
The Amphientomide, Lepidopsocide, and Lepidillide belong 
almost exclusively to the Tropics. Only two species occur in the 
sub-tropical region, namely, an Amphientomid, Stimulopalpus 
japonicus, nov, gen., nov. spec., in Japan, and one Lepidillid, Lepr- 
dilla Kelloggi, Rib., in California. One species only occurs in the 
Temperate zone, namely, Hchmepteryx Hageni, Pack., in the 
United States. 
The three families contain together nineteen genera; of these, 
three were described by Hagen (1859-1866), one by Ribaga (1905). 
one by Aaron (1886), and fourteen by me. 
Up to the present, forty-four species belonging to these nineteen 
genera are known, of which one was described by Packard, one by 
Ribaga, nine by Hagen, and thirty-three by me. Of the last, 
twenty-two species are established in the present work. 
TABLE OF THE RECENT AND Fosstn ScaLy CoPEOGNATHA. 
Fam. AMPHIENTOMIDAS, En- | IIl.—Syllysis, Hag. 1866, 
derl. 1903. 3. caudata, Hag. Ceylon. 
Sub-fam. TINEOMORPHINA, m. 4. erato,n. sp. Ceylon. 
-I.—Tineomorpha, nov. gen. 5. ritusamhara,n.sp. Ceylon. 
1. Greeniana, n. sp. Ceylon. | 
[1.—Cymatopsocus, Ender]. 1903. IV.—Amphientomum, Hag. 1856. 
2. opalinus, Enderl. 1903. Fur- 6. paradoxum, Pict. Hag., 1856. 
ther India. in amber. 
Sub-fam. AMPHIENTOMINa, | 7. leptolepis, Enderl., 1905, in 
Enderl. 1903. / amber. 

