234. 

 ICHNEUMON ATROPOS. 



Order Hymenoptera. 



Type of the Genus Ichneumon bidentorius Fah. 

 Ichneumon Linn., Fab., Lat., Fall., Panz. 



AntenncB inserted between the eyes, in a cavity towards the 

 middle of the face, long and setaceous, composed of 40 joints 

 and upwards, basal joint robust, cylindric, truncated obliquely, 

 2nd very short, 3rd slender and the longest, the remainder de- 

 creasing in length to the apex (1* a). 



Labrum transverse oval, a small portion only exserted, anterior 

 margin ciliated, and producing from beneath a fleshy acuminated 

 lobe (2). 



Mandibles small, resting transversely, slightly bent and bifid, 

 being notched below the apex (3). 



MaxillcB short, terminated by a large oval ciliated lobe and a 

 narrow fleshy one on the internal side. Palpi very long and 

 slender, composed of 5 joints nearly of equal length, basal joint 

 clavate, 2nd dilated subsecuriform, 3rd and 4th scarcely clavate, 

 5th very slender (4). 



Mentum short ovate. Labium short hollow membranous. Palpi 

 rather long slender and pubescent, 4-jointed, 3 first joints nearly 

 of equal size, clavate truncate, 4th much longer and more slen- 

 der (5). 

 Head short, vertical, orbicular. Eyes lateral oblong (1*, head of 

 I. jitropos viewed in front). Ocelli 3 in triangle. Pro thorax s/jori 

 and small, metathorax cancellated. Scutellum rounded, sometimes 

 gibbous. Abdomen alike in both sexes, oblong-conic or ovate, pe- 

 duncle short, slender and arcuate. Ovipositor very short and not 

 exserted. Wings with a pentagonal areolet. Legs, anterior the 

 shortest, posterior the longest. Coxae short and robust. Tibiae, an- 

 terior producing I spine at the apex, the others 2. Tarsi long, 5- 

 jointed, basal joint very long and notched internally at the base in 

 the anterior pair, 4th joint small, 5th not longer than the2nd. Pul- 

 v'lWi distinct. Claws simple (8, a foi-e leg). 



Atkopos Nob. 



Black, antennae with the basal half orange ; trophi and margin 

 round the eyes ochreous, top of prothorax, a line before and an- 

 other beneath each wing ochreous. Scutellum yellow. Abdomen 

 with the 3 first joints rufous. Wings shining, aureous yellow, 

 the posterior margins fuscous, nervures ferruginous. Leg ochreous 

 excepting the coxae, the apex of the posterior thighs and tibiae 

 which are black. 



Obs. In some specimens the black in the antennae extends nearer 

 the base, the head and face are more yellow and the metathorax 

 and the coxae more mottled with ochre. 



Li the Cabinets of Mrj Davis and Mr. S. Sulivan. 



Fallen states that the true Ichneumons deposit their eggs in 

 larvae that feed on the leaves of trees, and in pupae which lie 



