218 MR. A. M. ALTSON ON THE METHOD OF 
ravages, but on the other Lyctus beetles there are some descriptions of 
oviposition, and in three cases an egg is described. 
In 1853 Heeger figured and described an egg, a legless larva, and a pupa, 
which he ascribed to L. puhescens, Panz. 
la 1855 Noerdlinger described the larva, pupa, and adult of L. linearis 
{canaliculatus) , and in an account of the habits stated that the eggs were 
deposited in cracks or fissures. 
In 1874 Kaltenbach refers to the habits of the larva &i linearis {canali- 
■culatus) and to that of puhescens, quoting Heeger as his authority in the 
case of the latter. 
In 1876 Ferris described and figured the larva of linearis (canaliculatus'), 
and disputed the accuracy of Heeger's description of a legless larva of 
puhescens. 
In 1880 Kittel described — after Noerdlinger (1855) — the larva, pupa, and 
adult of linearis (canaliculatus). 
In 1883 Duges described and figured the larva, pupa, and adult of 
L. planicollis, Le Conte (L. carhonarius, Waltl.), to prove that the legless 
larva described and figured by Heeger could not belong to the genus Lyctus. 
In 1890 Rye refers to the discovery of a legless larva of " a species of 
Lyctus'" (?). 
In 1898 Xambeu described the life-history of linearis (canaliculatus) 
including a description of the egg, and stated that the eggs were deposited in 
cracks or fissures; this description was corroborated by Bureau (1900), and 
since by several writers. 
In 1916 Snyder described the egg and manner of oviposition ol planicollis, 
and figured the egg. This egg differs from that of puhescens as described 
and figured by Heeger, and from that of linearis as described by Xambeu, 
but it is practically identical in appearance with the egg of hrunneus found 
bv the writer. This similarity between the eggs of planicollis and hrunneus 
is maintained up to the time of maturation of the larva (PI. 12. fig. 4), but 
the method of the larva's hatching differs. 
Oviposition in hrunneus is similar to that of j)lanicollis, and it is not as 
described by French in 1918, who states : — "The female [hrunneus] deposits 
her eggs on the outside, underside, and ends of the timber." The eggs are 
deposited inside the timber. 
Material used. 
Most of the infested material from which L. hrunneus was bred was obtained 
in London from hardwoods stored in a timber yard, where the presence of the 
beetle had been known for a few years. 
Pieces of infested wood were collected in April 1920. The beetle was 
then still in the larval stage. In May of the same year, a small quantity of 
the infested material was placed in a refrigerator with a coustanc temperature 
