Many of the foreign species are rather large and handsome insects, often varied with black and yellow.
The best known of the Braconidæ is perhaps Microgaster glomeratus, a small blackish species with reddish-yellow legs, which destroys the larvæ of the common Cabbage Butterflies, round the dead body of which its little yellow cocoons may often be observed.
Family 22, Ichneumonidæ.—The Ichneumonidæ are rather large and slender insects, and are divided into many sub-families.
Fig. 33.—Bracon Bicolor.
They are a very numerous group. It has been calculated that nearly 5,000 species have been described, but the data generally are very untrustworthy.
Fig. 34.—Joppa Antennata.
The species of Trogus are rather large insects, measuring an inch or more in length. They are black with reddish legs and abdomen, and the wings are sometimes slightly dusky at the edges.