340 
THE STUDY OF INSECTS. 
more closely united to radius than to cubitus, leaving the 
latter apparently three-branched ; while in the Lasiocampidae 
cubitus appears to be four-branched. 
This superfamily includes the Bombycidae which are 
represented in this country only by the Chinese Silkworm 
and three families of native moths. These can be separated 
by the following table :— 
A. Vein Va of the fore wings arising midway between veins V! and 
V«». p. 340. . Bombycidae. 
AA. Vein Va of the fore wings arising nearer to vein Vi than to vein 
V 3 . 
B. Hind wings with two anal veins. 
C. The stalk of veins Vi and Va of the fore wings separating 
from radius before the end of the discal cell (Fig. 420, c. v.). 
p- 34 2 .Hemileucidae. 
CC. Vein Vi of the fore wings separating from radius beyond the 
apex of the discal cell. 
D. Veins Vi and Va of the hind wings joined to radius by a dis¬ 
tinct stalk (Fig. 417, c. v.). p. 343 Citheroniidae. 
DD. Vein Vi and Va of the hind wings not stalked ( Coloradia ). 
P- 35°. Saturniidae. 
BB. Hind wings with only one anal vein. p. 350.. .Saturniidae. 
Family B 0 MBYCIDA 2 (Bom-byc'i-dae). 
The Silk-worm. 
The Bombycidae as now restricted are not represented in 
our fauna; but a single 
species, the Silk-worm, is 
frequently bred in this 
country, and is usually 
present in collections of 
Lepidoptera. 
The Silk-worm, Bombyx 
mori (Bom'byx mo'ri).— 
The moth (Fig. 418) is of a 
cream-color with two or 
three more or less distinct brownish lines across the fore 
Fig. 418 .—Bombyx mori . 
