40 ICHXECMOXID.E. 



8 (9) Clvpeus as long as face; nervellus [p. 49. 



" entirely wanting (EDEMATOPSIS, Tschek, 



9 (8) Clvpeus shorter than face ; uervellus 



ili-tinct. 



10(11) Face transverse; terebra nearly as i_p. 6K 



long as abdomen ACJEXITRLLUS, gen. nor., 



11 (10) Face not transverse ; terebra shorter 



than abdomen. 



12 (13) Metathoracic spiracles circular ; 



basal segment of abdomen simple. THYMABIS, Forst., p. 52. 



13 (12) Metalhoracic spiracles linear ; basal [p. 54. 



segment of abdomen intumescent. BOLODERMA, gen. nov., 



14 (7) Areolet distinct and elongately 



petiolate TANEHA, Cam., p. 56. 



Genus ACJENITUS, Latr. 

 Aeeenitfs, Latreille, Gen. Crust, et Ins. iv, 1809, p. 9. 



GEXOTTPE, Ichneumon dubitator, Pz. 



Head transverse, subbuccate, and not narrowed behind the oval 

 and entire eyes ; clypeus short and transverse, deeply and semi- 

 circularly separated from the square face, the apical margin 

 subtruncate and centrally reflexed ; mandibles longitudinally 

 striate, usually apically bifid with the upper tooth more obtuse ; 

 ligula exserted ; antennal scrobes deeply impressed ; genal costa 

 inflexed. Antennae filiform, as long as or rather longer than 

 half the body. Thorax stout and strongly convex, with the 

 notauli very distinct ; mesosternum short, with indications of 

 lateral aulci ; metathorax short and rugose, with often indistinct 

 area;, spiracles large and elliptic, or linear. Abdomen smooth, as 

 long as head and thorax, somewhat narrower and subcompressed 

 apically, subsessile, convex and oblong, more constricted and 

 longer in <5 than in $ ; basal segment smooth and sub- 

 canaliculate, hardly dilated apically, narrower in J ; sixth of 

 $ ventrally concave and elougately acuminate; terebra from 

 about half to fully length of body. Hind legs elongate and 

 incrassate, with the tarsal claws large, curved, and not pectinate ; 

 front tibiae with one spur. AVings with no areolet ; the upper 

 pair with basal nervure perpendicular and not curved, fenestrae 

 large and nearly confluent ; lower ones with the first recurrent 

 postfurcal or subopposite. 



Banrje. India, Africa, Europe and North America. 



Gravenhorst has called attention to the relationship of this 

 genus with Lissonota, Coleocentnts, Arotes, and Collyria. It is, 

 however, abundantly distinct from any of these, and probably most 

 closely related to Lampronota, though the superficial resemblance 

 to the Braconidous genus Helcon is, as remarked by Haliday (Ent. 

 Mag. 1836, p. 143), curiously striking. Its species are known to 

 prey upon the lignivorous Lepidopterous larva? of the 

 and the imagines are attracted to umbelliferous flowers. 



