Insects Bred from American Larch 93 
Sirex abbotii Kirby. 
(Det. by 8S. A. Rohwer) 
The distribution of Sirex abbotii is given by Bradley 
(1913, p. 18) as Georgia. No record of host trees has been 
found in the literature. It is very likely that this species 
will be found to breed in about the same trees as S. cyaneus, 
which occurs in spruce and fir, but which perhaps has a more 
northern range. 
All our specimens of this siricid were bred from larch 
material derived from Tree X, the same tree from which 
most of the specimens of U. albicornis were obtained. The 
specimens of S. abbotit, however, emerged from the lower 
and middle trunk region only. Otherwise the habits seem 
to be practically identical with those of the other siricid. A 
total of thirteen specimens were obtained, ten of these being 
males and three females. Mr. S. A. Rohwer, who in iden- 
tifying them has examined one of the females and a number 
of the males, says: ‘‘ The above record for a female of Sirex 
abbotii Kirby is the first association of a female with this 
species. The female is very close to S. cyaneus Fabr. and 
may be under that name in collections.” The specimens 
emerged in our cages during June and July (June 9; July 6, 
i2ulo,-16,.17, 18). 
Sirex abbotit belongs to the same association as U. albi- 
cornis and bears the same relations with its associates as does 
the other siricid. 
Tenebrio tenebriodes Beaur. 
Tenebrio tenebriodes is probably distributed throughout 
the entire northeastern part of the country, as it has been 
reported from Pennsylvania (Hamilton, 1895, p. 341), New 
York (Felt, 1906, p. 493) New Jersey (Smith, 1909, 
p. 359) and Indiana (Blatchley, 1910, p. 1251). Further 
than the fact that this insect is usually found under decay- 
ing bark or in other similar locations very little is known 
regarding its habits. Felt (1906, p. 493) records it “ under 
decaying willow, butternut and basswood bark in early 
