A-/o; 



736. 

 THERION AMICTUM. 



Order Hymenoptera. Fam. Ichneumonidae. 



Type of the Genus, Ichneumon circuraflexus Linn. 

 Therion Curt. — Anomalon Grav. — Ichneumon Linn., &c. 



Antenna inserted a little above the middle of the face, longer 

 than the wings in the male, filiform, composed of innumerable 

 quadrate joints, basal one the stoutest, 2nd minute, 3rd the 

 longest : shorter and stouter in the female, more tapering to 

 the apex, and the joints transverse. 



Labi-urn transverse, semiorbicular, ciliated with long hairs, having 

 a minute lobe in the centre (2). 



Mandibles slightly curved, terminating in a strong beak, with a 

 long but smaller tooth outside where it is hairy (3). 

 Maxillce short, terminated by a semiorbicular ciliated lobe, with 

 a smaller serailunate one inside. Palpi very long, pilose and 5- 

 jointed, basal joint rather the shortest, 2nd the stoutest, oth 

 the slenderest and linear, the apex ovate (4). 

 Mentum elongate-ovate. Palpi shortish, pilose and 4-jointed, 

 basal joint obovate, 2nd stout, semiobovate, 3rd somewhat 

 hatchet- shaped, 4th the longest, slender and subfusiform. Lip 

 short and bilobed (5). 

 Head transverse, base very concave ; face orbicular-ovate : eyes ovate, 

 not large : ocelli 3 in triangle on the crown. Thorax rather short, 

 thick and oval : scutel gihbose and semiorbicular or subquadratc : 

 metathorax sloping, flat and rugose. Abdomen very long and 

 slender, compressed, arched, clavale, carinated above, with distinct 

 spiracles down each side : petiole long, slender, cylindric and cla- 

 vate, 2nd joint slender : ovipositor short but exserted. (G $ , ter- 

 minal segme7its of female ; (^ the same of male.) Wings mlich 

 shorter than the body ; superior with a long marginal cell, no 

 areolet and a long narrow stigma. Legs slender, anterior short, 

 hinder very long : trochanters, hinder very long and b'larticulate : 

 thighs simple, clavate : tibiae clavate, spurred : tarsi, hinder with 

 2, 3 or 4 of the basal joints incrassated in the viales ; 5-jointed, 

 basal joint the longest, terminal one slender, clavate : (8 ^ hind leg). 



Amictum Fab. — Curt. Guide, Gen. 531. 114. 



Male, head with an acute spine in front, black as well as the 

 thorax, thickly punctured and pubescent : antennae very long, 

 ferruginous, ochreous beyond the middle, basal joint yellow 

 with a black line outside, 2nd and base of 3rd yellow beneath : 

 face and trophi yellow : abdomen ferruginous, a faint streak of 

 black on the petiole and a black shining stripe on the back of 

 the 2nd; 4th and following segments fuscous beneath as well as 

 the backs of 2 or 3 of the terminal : wings yellowish, the mar- 

 gins slightly fuscous, nervures brown, stigma ochreous : legs 

 yellowish, outside of thighs and apex of tarsi ochreous: hinder 

 legs bright ferruginous, coxae and trochanters yellow beneath ; 

 apex of tibiae dull black ; tarsi dilated, basal joint attenuated to 

 the base, the following ochreous, 2nd joint robust oval, 3rd but 

 shghtly thickened, 4th minute, 5th small and clavate. 



This pretty little group is distinguished from Paniscus by the 

 absence of the areolet, and from Ophion (pi. 600.) by its less 



