328 Mr. Newport on the Natural History 
tain not only that the larvee of Sitaris resemble those of Meloé in general form, 
but also that they are similar to them in their economy and parasitism. 
Other families of Coleoptera allied to Meloé in the structure of the imago, 
resemble them also in the habits of the larvae. This is the case, as formerly 
stated, with Horia*, which in the larva state resides in the cell of the car- 
penter-bee, Xylocopa Teredo. The precise form of body in which Horta comes 
from the egg is unknown; and it is also unknown whether the egg is depo- 
sited in the nest of Xy/ocopa, or whether, as I strongly suspect, it is conveyed 
to it on the body of the female Xylocopa as an agile larva, like Meloé, Lytta 
and Sitaris. In that stage of growth in which it has been delineated and 
described by Lansdown Guilding, it is a short-legged hexapod, very like the 
larva of Meloé towards the close of its period of feeding, when it has been 
long located in the nest of its foster-parent, Anthophora. Cissites maxillosa 
and C. testacea, Javanese species allied to Horia, are said to reside as larvae 
in deep burrows in the woodwork of houses}, probably formed by larvae on 
Which these are parasites. Of the larva of Cerocoma and its habits we are at 
| present entirely ignorant. 
Some other genera, less closely allied to Meloé than those we have noticed, 
differ from it somewhat in the form of the larva, and in the particular habits 
both of that and of the imago, but resemble it in its general economy of 
parasitism. Rhipiphorus paradoxus, the pest of the wasp's nest, is believed 
to deposit her eggs either in the larvzef or in the cells$ of that insect. 
Another species, Symbius Blattarum, the female of which is apterous, is 
parasitic on Blatta Americana||, and its form, as well as that of its larva, 
resembles that of Sitaris. A more rare species, Rhipiphorus finnicus of Pay- 
kull (Pelecotoma Latreillei, Fischer), which is peculiar to Finland, is stated 
by Count Mannerheim € to be parasitic on the genus Chrysis. It is often 
seen to issue from little holes in the doors of old wooden buildings, fre- 
quented by the Chrysidide in their parasitism on other insects. This para- 
sitism on parasites is of frequent occurrence amongst insects. Mr. Curtis 
* Linn. Trans. vol. xiv. p. 316. T Westermann in Silbermann, Rev. Entom. No.3. 
* 
t Hope, Proceed. Ent. Soc. $ Westwood, Introduction, vol. i. p. 294. 
, || Sundevall, in Isis, 1831. - «| Rev. Zool. Feb. 1844, p. 64. 
