AVALSH — DESCRIPTIONS OF N. AM. HYMENOPTERA. 69 



vein. Mr. Norton asserts that "ordinarily the c? and ? are alike," 

 and he describes as "Variety a c?" a c? apparently identical with 

 mine, which is said to have been taken in coitu with the normal 

 $. {Proc. Ent. Soc. Phil. iii. p. 6.) 



Family ICHXEUMONID^. 



[The annexed figure, representing the front wing of Ichneumon, is here 

 given to indicate the locus of the bul- 

 l£e A — G, frequently referred to in the 

 descriptions given below. For a de- 

 tailed description of these bullae, and 

 ( remarks about their generic and spe- 

 cific value, the reader is referred to .^ io 

 Mr. Walsh's paper "On Phytophagic Varieties and Phytophagic Species," 

 in Proc. Ent. Soc. Phil. vol. v. p. 209, and vol. vi. p. 242. — Cresson.] 



JOPPIDIUM, new genus. 

 Head transverse ; face flat ; clypeus large, transversely oval, 

 the clypeal suture distinct ; mandibles large, bidentate, and, as 

 well as the whole mouth, prominent. Antennae moderate, seti- 

 form ; the ist joint obliquely truncate above nearly to its base, the 

 2d joint large, projecting beyond the tip of the ist; first 3 joints 

 of the flagellum long, subequal, the rest gradually shorter, the ter- 

 minal \ $ flattened except at tip and dilated to about double its 

 width elsewhere (as in Joppa ? Brull6 Hym.., Plate 43, fig. \d). 

 Thorax with the mesonotum gibbous and the parapsidal grooves 

 usually distinct ; scutel hunched and rather elevated ; metathorax 

 gradually declivous, the typical areas mostly obliterated. Abdo- 

 men peduncled, elongate-oval, basally depressed, slightly com- 

 pressed at tip, much narrower than the thorax, and a little longer 

 than the head and thorax together. Joint i very long, slightly and 

 gradually inflated towards the tip, the spiraculiferous tubercles 

 placed at about t of the way to the tip, where the peduncle ter- 

 minates and there is a slightly curved geniculation. Joint 2 longer 

 than wide, the rest gradually shorter and shorter, the terminal joint 

 not retracted. Venter excavated, longitudinally bicarinate. Ovi- 

 positor moderate ; the "anus slit," as it is termed. Legs long and 

 slender, the femora not incrassate, the hind femora and trochan- 

 ters longer than usual ; spurs normal ; ist tarsal joint of the front 

 legs basally more emarginate than usual, the 4th tai'sal joint in all 

 the legs short and entire ; claws simple, longer than the pulvillus. 



