WALSH DESCRIPTIONS OF N. AM. HYMENOPTERA. I57 



cate. Ovipositor and sheaths very short. Legs long and slender, 

 especially the hind legs. Tibiae without thorns. Spurs normal. 

 Claws unarmed, the pulvillus as long as the claws. Wings long. 

 Radial area and stigma rather short. Area obsolete, the areolar 

 cross-vein transverse and as long as usual. First recurrent vein 

 much curved but not angulated ; 2d recurrent vein obsoletely bi- 

 angulated. Bullae 4, A, C, D, and E ; A subobsolete and placed 

 on the anterior end of the areolar cross-vein, C and D close to- 

 gether on either side of the salient angle of their vein, and E 

 pretty close to the curve of its vein. 



Differs from Tropistes, Arotes, and Acxnites, by its very short ovi- 

 positor ; from Arotes, by the cubito-discoidal cell receiving only 

 one recurrent vein ; and from Arotes and Accenites, by the 6th ven- 

 tral $ not being prolonged. From the other Banchoid genera it 

 is separated at once by its obsolete areolet. Kirby's genus Cryp- 

 tocentrum disagrees with mine in the anterior margin of the face 

 being "crenate" and in the abdomen being "sessile," so that the 

 first joint is "rather wider at the apex." 



CryptOCeiltrus {(Trypkon?) SllbmargiliatUS, Cress., Proc. Ent. Soc. 

 Phil. iii. p. 274.] — $. — Black. Head subopaque, with very minute, rather 

 sparse punctures, obsolete on the polished vertex. Clypeus, 4 equidistant 

 small spots adjoining it behind, the outer one on its lateral extremity, man- 

 dibles except their teeth, and palpi, all white. Antennae brown-black, the 

 1st joint of the flagellum 4 times as long as wide, the 2d joint £ shorter, the 

 rest slowly shorter and shorter. Thorax subpolished, with very minute, ra- 

 ther sparse, shallow punctures. Metanotum minutely rugoso-punctate, sub- 

 opaque ; the basal area equilaterally triangular, the central areaobovate and 

 truncate at tip ; lateral areas with their exterior side obsolete and no cross- 

 carinae; posterior area distinct and bisected lengthways by a carina. Tegu- 

 lae, a line under the front wing, a spot under the humeral suture before the 

 tegula, and a broad line overlying it nearly to its tip and terminally clavate, 

 and also both scutels, all white. Lower face of the mesosternum and meso- 

 and meta-thoracic pleura halfway to either wing, all pale rufous. Abdo- 

 men polished, densely and very minutely rugoso-punctate; the 1st joint 

 subopaque, longer by £ than wide, 2\ times wider at tip than at base, its 

 sides straight, its carinas distinct nearly to the tip, its terminal J with one 

 or two longitudinal striae on each side of the carinas; joint 2 square; 3-5 

 slowly shorter; 6 short; 7 and 8 very short. Tip of 2-7 and middle \ of 

 the tip of 1 with a white line; very slender on 1, 2, 6, and 7. Venter with 

 the longitudinal carina whitish. Sheaths of ovipositor black, not quite 

 attaining the tip of the dorsum. Legs pale rufous. Four front legs with 

 their coxae and trochanters white, except the basal § of the middle coxae; 

 middle legs with the basal \ of their tibia? and of their tarsi whitish ; the 



