many caterpillars, which, if left to multiply unchecked, would totally consume many of our most useful plants.
The genus Joppa is principally distinguished by the form of the antennæ, which are much thickened beyond the middle, and then terminate in a point, as is well seen in the handsome species (J. Joppa,) figured on Pl. XXXI.
Another example of this genus is given on Pl. XXVI. fig. 24, J. antennata, (Fabr. Syst. Piez. 122, Ent. Syst. 158, Ichneumonia,) from a drawing by Mr. Westwood. It is a native of South America. The specimen is in Mr. Hope's collection.
EPHIALTES MANIFESTATOR.
Plate XXXII. Fig. 1.
The subgenus ephialtes of Gravenhorst is characterised by a long abdomen, which is generally tuberculated, the anterior segments longer than broad, those at the apex with a longitudinal groove on the underside in the females; ovipositor long. The species above named is from eleven to fifteen lines in length, the female being largest. Body black, palpi and labrum ferruginous, thorax sometimes with a ferruginous spot at the base of the wings, the latter light smoke colour; legs long and rather slender, fulvous or rufous, the posterior tarsi and tibiæ, and sometimes the knees, fuscous. Ovipositor longer than the body, the tube chestnut red.
