Page:The Gall Wasp Genus Cynips.pdf/115

 périr la larve du cinips: peut-être aussi ces deux insectes étant armés de semblables aiguillons, peuvent-ils l'un & l'autre déposer leurs oeufs sur les feuilles du chêne & occasionner des galles semblables.

Translation: A dark colored Diplolepis from a globular, naked, and hard gall on the leaves of the oak. [References.] This insect is entirely brown and rather shining. Its antennae are as long as its body. It is large, with a body that is compacted as with others of the genus. Its wings are transparent, more than twice the length of the body [corrected to “less than twice the length” in 1799 edit.], having a brown spot on each anterior margin. The wings are ordinarily carried flat, one on top of the other, on the insect's body.

The insect originates in galls that are rounded, hard, and shining and occurring on the under surfaces of the leaves of the oak. These same galls produce a Cynips [i.e. a parasite!] which we have already considered. It is still to be determined whether it is the Cynips or the Diplolepis that is the rightful inhabitant of the gall; and that is not easy to determine; for it may be that the Cynips, in laying its eggs, gives rise to the gall, and that the Diplolepis then lays its eggs in the developing gall and thus causes the death of the larva of the Cynips; or it may be that the two insects have similar ovipositors which allows either one to produce this sort of gall when it oviposits on the leaves of the oak.

Of scutellaris. Olivier, 1791, Enc. Méth. 6: 282. Diplolepis scutellaris.

Diplolepis niger, scutello rufescente, alis puncto nigro.

Il a environ deux lignes & demie de long. Les antennes & le corps sont légèrement velus & d'un brun noir. L'abdomen est noir & luisant. L'écusson est rougeâtre. Les ailes sont un peu plus longues que l'abdomen; les nervures sont noires sur la partie extérieure, & forment, par leur réunion, une petite tache noire au milieu de l'aile.

La galle que produit cet insecte, vient sur le revers des feuilles du Chêne, & ressemble parfaitement au fruit de l'Arbousier: est rougeâtre, globuleuse, & entièrement couverte de petites tubérosités.

Il se trouve à Manosque, ou il a été observé par M. Danthoine.

Translation. A black Diplolepis with a reddish scutellum, each wing with a black spot. The insect is about 5 mm. long. The antennae and the body are finely pubescent and brownish black. The abdomen is shining black. The scutellum is reddish. The wings extend a little beyond the abdomen; the wing veins are dark toward the anterior margin, forming by their fusion a small, dark spot [areolet] in the middle of the wing. The gall which gives this insect occurs on the undersides of the leaves of the oak, closely resembling the fruit of the strawberry tree (Arbutus unedo). It is red, globose, and well covered with small tuberosities. It occurs at Manosque where it has been observed by D'Anthoine.

TYPES.—Not designated for either folii, quercus, or scutellaris, and probably not in existence. The Linnean material of folii possibly from Sweden, possibly from more Central Europe; the Geoffroy