203 
There is therefore a necessity for a careful review of the complete 
life history of the insect, and this we have endeavoured to give in the 
following pages. 
Tur Ece.—The egg is quite smooth, wits es in sore and is 
of a deep orange-yellow colo It measures about 0°7™" in length. 
ie average number of e ei s laid b the females varies ie i 
she dwells; Seriea diminishing in proportion as the p is y 
infested—a general law among have been 
counted in a nos a r. Coquillett, while Mr. Koebele has 
remaine 
from the ix "tem 
he time requited for the eggs to hatch after leaving the body of 
the female varies with the temperature. In the winter time the sacs 
are oe filled eos eggs, while in the hottest part of the summer 
m more than one or two dozen will be found in each sac. me 
Collated by Mr. Coquillett on the 18th of March did not hatch until 
the 10th of May; but in mid-summer hatching is only a matter of a 
few days. 
vA— First Stace.— The newly-hatched female 
larva (and probably the male is identical with it at this stage of growtl h, 
since we have not been able to separate them into males and females) i is 
red in colour, inclining somewhat to brown. The body is ovoid in out- 
line, being- flattened beneath and convex above. The antenne are lon 
short ones, bears near its tip four very inet ones, each of which is con-. 
siderably longer than the whole antenna. ‘The Jegs are thin and brown 
in colour. The coxe and femora are modera rately large, while the tibia 
and tarsi are long and thin, the terminal joints of the latter bearing 
several long hairs. ‘The upper digitules are represented by simple hairs, 
but the lower ones are present and are bent near the base. The eyes are 
prominent and are each mounted ona short tubercle. The mentum is 
broad and apparently 2-jointed, The rostrum is broad at base and the 
rostral sete are not very long. At the tip of the rounded abdomen are 
6 small tubercles, 3 each side of tip, each of which carries a long stout 
hair, which is as long as the whole body. The body above shows 6 rows 
of secretory pores, 4 along the middle, and 1 on each side. More or less 
regular rows of hairs alternate ig these pores 
FEMALE DAR piaia STAGE. —Àc cording to Maskell and Com- 
stock, bote re are but thre es ot growth i in the female after hatching, 
and these are readily distinguished b Aa e number of antennal joints ; 
the larva of the first stage hav , that of the sores 9, and the 
adult 11. Messrs. Coquillett and ‘Kos came to the same conclusions, 
ci all have overlooked a form w we have found en abundantly 
mong the material we have sindici, and which seems to constitute an 
AP E stage between the t and second, and which is 
of course produced by an additional molt whic h we have personally ob- 
served in the field. Hence the so-called “second stage" of these authors 
