HYMENOPTERA.—EVANIIDZ. 133 
amongst the Fossores, which I have refigured with details from a speci- 
men in the Berlin Museum, proving it to belong to this family 
(Guérin, Mag. Zool. pl. 179.). 
The curious and exceedingly rare British genus Ibalia is distin- 
guished by the long and very compressed sabre-shaped abdomen 
which is terminated in the females by a recurved slender terebra 
(fig. 73. 22.); the hind legs, and especially the basal joint of the 
tarsi, are disproportionately long and broad; the 5th dorsal segment 
of the abdomen is furnished on each side with a spiracle. One 
species only was known of this genus until I described a second from 
the Berlin collection, and I am acquainted with another species from 
Georgia. 
The family Evanrip® * (Evaniade Leach) is of small extent, but 
comprises insects of very peculiar structure, and which it will pro- 
bably be necessary to separate into other groups. They may, how- 
ever, be distinguished by the following characters :—The antennz are 
filiform or setaceous, not elbowed, and 13 or 14-jointed ; the mandibles 
are toothed on the inside ; the maxillary palpi are 6-jointed, and the 
labial 4-jointed ; the wings are veined, the anterior having several 
irregular cells, arranged somewhat like those of Oryssus and the Ich- 
neumones adsciti, but the posterior are destitute of cells; the 
abdomen is attached to the dorsum of the metathorax by a peduncle, 
which sometimes arises close to the scutellum; the ovipositor is 
straight, and sometimes exserted ; the hinder legs are the longest, with 
the tibiz often incrassated. The species are parasitical. 

* Breviocr. ReFrer. To THE Evanupz. 
C. G. Nees ab Esenbeck. Hymenopt. Ichneumon. affin. vol. ii. (Monogr. Evanial. 
Europ. ) 
G. Dahlbom. Excercitat. Hymenopt., Part 6. (Lond. Goth. 12mo. 1833. Monogr. 
Evan. Suec.) 
Latreille, in Bull. Soc. Philomat. t. ii. ( Pelecinus. ) 
Serville, in Ann. Soc. Ent. France, tom. ii. 1833. (Aulacus patrati.) 
Illiger, in Rossi Fauna Etrusca, 2d edit. 
Westwood, in Griff. Animal Kingd. Insects. pl. 66. (Megalyra. ) 
Fabricius, Curtis, Jurine, Perty (Delect. An., art. Braz. ). 
K 3 
