164 ENTOMOLOGICAL SOCIETY 
genus, which, upon subsequent comparison, I fail to distinguish from P. 
annectens.* The former of these is an easily recognized species known to 
infest Pine trees, and its occurrence on Liquidambar could not fail to at- 
tract mj attention. Wishing to ascertain the life-history of this, as well as 
of P. annecteus, I carried some infested branches with me to Washington 
for further investigation. I did not breed a single specimen of P. puli- 
carius, nor did I find any trace of its galleries under the bark, and feel con- 
fident, therefore, that this species does not breed on Liquidambar, and that 
the specimens only visited the tree for feeding purposes. Of P. annectcns 
I obtained, in the course of the subsequent month, several hundred speci- 
mens from the branches. Its work closely resembles that of P. concen- 
tralis, but the primary and larval galleries are longer, owing, no doubt, to 
the softer nature of the wood. 
In July of the present year an immense colony of Pityopkthorus- consi- 
milis was found near Washington, D. C., infesting the dead and dying 
branches of a large specimen of Rhus toxicodcndron, which had been torn 
down by a storm in August, 1887. That this species infests Rhus glabra 
has been pointed out by me on a previous occasion (see p. 17), but I had 
not before known it to live in the Poison Ivy. Its primary galleries also 
start from a central chamber, but usually follow, more or less, the longi- 
tudinal axis of the vine, rarely going around the twig. The species is evi- 
dently very prolific, and the larval galleries crowd and intersect each other 
so often that the whole bark in the vicinity of the central chamber is com- 
pletely undermined, and the individual larval galleries cannot longer be 
distinguished When full-grown the larvae enter a little more the solid 
wood to undergo their transformation. Pieces of infested vines were, for 
several months, under my observation, and thousands of beetles emerged, 
and some are still emerging up to the present day. 
Although I had twigs of Liquidambar and vines of Poison Ivy infested 
with Pityophthorus for several months in my room I never obtained a 
single hymenopterous parasite therefrom, but I had occasion to observe 
some coleopterous enemies of these Scolytids. Lcemophlceus (Dysmerus) 
basalts occurred occasionally in the galleries of P. concentralis in southern 
Florida. I obtained it also in some numbers from Liquidambar twigs in- 
fested by P. anncctens, and in great numbers from the vines of Rhus toxi- 
*The species was described by Dr. LeConte from specimens found by 
me many years ago at Tampa, Fla., on the Yellow Pine (Pinus palustris). 
The specimens were only beaten from the trees, which does not indicate 
that they breed under pine bark. From what we know at present of the 
life-history of our Pityophthorus, it seems hardly probable that the same 
species infests Conifers and, at the same time, deciduous trees. It is pos- 
sible that we have to do here with two different species. From a letter 
by Dr. LeConte, published in Bull. No. 7 of the U. S. Entom. Comm., pp. 
260-261, it appears that Dr. Packard also obtained P. annectens from a de- 
ciduous tree, but, unfortunately, the name of the tree is not mentioned. 
