64 MR. NEWPORT ON THE ANATOMY AND DEVELOPMENT 
: to the ima 
When the nymph (fig.6) state was attained, ti ser > cm — we ies 
occurred in about ten or aw tede yox e ibn tances, however, no change took place 
the following seven or m : : d in the state of larva. The fact of 
un ui, Mean piod an of rer ae the cell otherwise entirely empty, 
i -grown at the en , 
RE Gace species is carnivorous and feeds on m young of the = d 
The imago.—The two sexes of this insect differ much in their haie ans : = 
appearance, and the dissimilarity is so great, that if they were found — f i 
stead of being constantly together, they might readily be taken for distinct paS ; 
males are heavy and creeping in their ee en eg wem 
ing to escape, but the females are lively an very active. : 
CNN of the ipti Re male (fig.1) is of a deep yellow colour, very different ms. 
the female, which is of a shining bronze-green. It has a large rounded head, somew 
wider than the thorax, with a single ocellus on each side, instead of the usual large com- 
pound eyes of the tribe, and it has also a transverse row of three ocelli on the bern 
The antenne (fig. 1 a & b), as I have shown, differ so much from these organs in the o Rn: 
sex, that they might easily be mistaken for those even of an entirely different genus. ie 
prothorax is conical, and the head is supported on it as on a pivot. The mesothorax s 
somewhat quadrangular, and the scutellum very large. The abdomen in both sexes 
seven distinct segments: it is sessile and of a suboval form. The legs are more robust 
in the male than in the other sex, the tibia and femur being well developed, and the tarsi 
are five-jointed. "The wings are small, narrow, and extend backwards, when folded, as 
they usually are, to about one half the length of the abdomen. I never have seen the 
male unfold, or attempt to use them. : : 
The female (fig. 2) is of a shining bronze-green colour, with a large head, and large com- 
pound eyes at the sides. The antennze (fig. 2 a), as in most of the tribe, are each formed * | 
a long basilar joint, about one half the length of the entire organ, the remaining portion 
composed of five joints being somewhat clavate, The prothorax and mesothorax resemble 
those of the male, as also does the abdomen, excepting that it is highly polished. ‘The 
ovipositor is concealed. The Wings are large, rounded, and iridescent, and the insect is | 
exceedingly active on them. The legs (fig. 5 d) in this sex are yellow, and less developed 
than in the male, The number of females in each nest was as six or eight to one of the 
other sex, the number of the whole in each nest being from thirty to fifty. hc 
I have been unable to find any description in the works of entomologists of this curious 
genus of parasites. Mr. Walker, our most assiduous monographer of the Chalcidide, 18 
unacquainted with it; and the only naturalist, so far as I can ascertain, who has made 
reference to an insect which Possibly may have some affinity with this, is Mr. Westwood, 
Who, in his work * published in 1839, mentions a species found by M. Audouin in France, 
in the nests of « Odynerus, Anthophora and Osmia,” but he adds that “the species has 
not yet been described." Since then he has again alluded to M. Audouin’s insect t, 38 
* Introduction to Modern Classification of Insects, vol. ii, part xi. p. 160. (March 1839.) 
> p. xviii, in the Transactions, vol. v. part 3. 1848. 
