200 Transactions.—Zoology. 
attacking orange trees in Sydney, which, he says, “appears to be an 
Aspidiotus.” I take it that this is my Aspidiotus aurantii ; but it would seem 
from his expression that hitherto no detailed description has been given of 
[Nore.—Aspidiotus limonii, Signoret, cannot be this species.] 
Aspidiotus camellie, Boisduval, attacks camellias in our greenhouses. 
It somewhat resembles Aspidiotus nerii, but there are no groups of spin- 
nerets. 
Subsection 3.—Diaspis, Costa. 
In this genus, as in the last, the puparium of the female is round and 
flat, but the discarded pellicles are usually at the side instead of in the 
centre. The female is generally rather more elongated than in Aspidiotus. 
The puparium of the male is long and narrow; the perfect insect does not 
differ from Aspidiotus, except that the space between the first and second 
pair of legs appears disproportionately long. 
1. Diaspis boisduvalii, Signoret. 
Plate VI., fig. 9. 
This is an European species. I have found it in abundance upon 
orchids in Mr. Dunean's hot-houses. The female is somewhat pear-shaped, 
the cephalic region smooth, with a protruding lobe at each side on a level 
with the rostrum, distinguishing it from all the other species. There is 
sometimes a cottony fluff on the body. The widest portion is a little below 
the lateral protuberances ; from thence it tapers gradually to the posterior 
extremity, where the abdomen ends in two lobes with a depression between 
them. The abdominal curve is broken by small serrations with a few spiny 
hairs amongst them. The pygidium has five groups of spinnerets; the 
uppermost group has from five to eight openings, the two upper side ones 
twenty to twenty-five, the two lower somewhat less. There are a few 
scattered single spinnerets, mostly oblong. 
The male is very small; its cocoon is white, cylindrical, with the dis- 
carded pellicle (similar to that of the female) at one end. As in Aspidiotus 
epidendri, the perfect insect escapes from its cocoon backwards (Plate VI., 
fig. 9b. The head is transverse, grooved in front, with four eyes, of which 
the two occupying the position of the rostrum are full of pigment. The 
antenne spring from the anterior region; they are very long, having ten 
joints, of which the two first are short and thick, without hairs, the 
remainder twice as long but narrower, and covered with fine hairs. The 
last jomt (which possibly may consist of two or three soldered together) is 
spindle-shaped. 
The thorax is long ; the thoracic band conspicuous, but occupying only 
about half the width of the body. The wings, which appear to have only a 
