1- )H?>d 

 321. 



MICROGASTER ALVEARIUS. 



Order Hynienoptera. Fam. Ichneumonidae Lat.^ Leach, 



Type of the Genus, Ichneumon globatus Linn. 



MicROGASTEB Lat., Ill, Spin., Leach. — Cryptus S^ Ceropales Fab., 

 — Bassus Panz. — Ichneumon Linn., Fab. 



AntenncB inserted between the eyes, above the middle of the face, 

 approximating, filiform, very pubescent, composed of 18 joints or 

 upwards, basal joint the most robust, 2nd subglobose, 3rd and 

 following long, appearing like 2 joints united, terminal joints 

 subglobose, the last conical (fig, 1, the basal and terminal joints). 

 Labrum transverse-ovate, pilose, ciliated, base emarginate, an- 

 terior margin straight (2). 



Mandibles small, subtrigonate, externally pilose, bifid at the 

 apex which is acute, the lower tooth being blunt (3). 

 MaxillcE rather long and meeting below the mentum, terminated 

 by two very distinct lobes, the internal one somewhat transverse 

 or lateral, the external large, elongate-ovate and very pilose. 

 Palpi very long and pilose, 5 -jointed, 2 first joints the most 

 robust, basal joint rather the shortest, 2nd a little the longest, 

 3rd rather shorter, 4th and 5th slender, the latter as long as the 

 3rd J the former shorter (4). 



Mentum subobconic. Lip membranous subcylindric, the sides 

 nearly meeting above, pubescent and ciliated. Pnlpi long, in- 

 serted at the anterior angles of the mentum, triarticulate pilose, 

 basal joint the shortest and rather the most robust, 3rd a little 

 the longest, subfusiform (5). 

 Head orbicular, transverse. Eyes not large, lateral. Ocelli 3, large 

 and very prominent. Thorax globose and rather gibbous. Abdomen 

 attached by a small portion of its base, but appearing sessile, short, 

 flat on the back and rugose at the base, compressed beneath in the 

 females, 8-jointed, furnished below the apex with two flat pilose 

 valves and with a sheath below, producing an Oviduct composed, of 

 an incurved horny and sharp sheath, containing 2 fine bristles (6). 

 Wings pubescent , with a strong costal nervure and large stigma; 

 3 discoidal cells and a suhtriangular areolet (9), sometimes imper- 

 fect. Legs robust, posterior very long. Coxae, hinder pair very 

 large. Tibiae spurred. I'arsi 5-jointed, basal joint the longest. 

 Claws and Pulvilli small. 



Alveabius Fab. E. S. Supp. 232, 232.— bicolor Curt. Guide, G.554.5. 

 Brightish ochre, clothed with very short pubescence. Eyes and 

 ocelli black. Postscutellum black and punctured. Abdomen 

 black and shining, 1st and 2nd joints rugose and pale at the 

 sides, an orange spot at the base, and one on each side at the 

 middle, the underside is ochreous at the base. Superior wings 

 with the costa and stigma fuscous, the nervures paler, the areolet 

 imperfect. Hinder thighs and tibiae at the apex, their tarsi, and 

 all the claws and pulvilli, blackish. 



Obs. The antennae are sometimes fuscous, and the 2 orange 

 spots on the body very obscure. 



In the Author's Cabinet. 



