are afterwards withdrawn during the quiescent or pupal stage, to 
be finally driven out again on reaching maturity. Contrary to 
the usual way in Hemiptera, these males undergo complete 
metamorphosis. The waxy coat of the female consists not of the 
larval cuticles that were shed, but of variously crumpled and felted 
wax filaments emitted by dermal glands, and enclosing the re- 
mains of the cuticles. The embryological development is much 
as in Aphides, but the eggs have no pseudo-vitellus. 
Some notes on the Chermetidz are appended to the article, es- 
pecially on Chermes abictis and on Phylloxera. He kept the galls 
of Chermes, in autumn, till the parthenogenetic females escaped, 
of two varieties, some yellow, others nearly black. The female 
oviposited on the needles of a pine-branch in a heap. After this 
operation the mother died, protecting the eggs with her shrunk 
body and wings. In spring large wingless females were found on 
the pine-shoots, having remained over winter. Each had thirty 
to forty egg tubules, with two to four well-formed eggs; and the 
eggs had a pseudo-vitellus. The eggs were laid in masses at the 
base of the young pine-shoots ; the masses of eggs being covered 
with wax and with the carcass of the mother. The young issuing 
from these eggs moved to the axils of the needles, and together 
formed the nucleus of a cone-like gall; by their sucking the needle 
swells, coalescing with the gall. It is not the swelling of the 
needle, but of the branch that causes the gall; and this is due to 
the piercing action of the larvæ, not of the mother—G. Maclosnit. 
` 
ao think the tænidia invariably form a continuous spiral thread. “P 
~- the axils of the branches we see short spindle-shaped taenidia; 
”» In certain Nne 
trachez of the eyes of the fly no spiral threads are developed, 
ous it may be called a senidium ; when only separate rings ree 
developed they may be called tenidia. I think, however, that F 
have demonstrated the nuclear origin of the “ spiral thread, an 
_- that the elongated filamental nuclei of the endotrachea coalesce 
a to form the spiral senidium.—A. S. Packard. 
- Desrructive Locusts IN Trexas.— During the past winter f 
ington county, and fears were expressed of great injury, 
‘Son, from the resulting locusts, Professor Riley, of the Depa? 
= t a t 
“ 
