350 EDWARD NORTON. 



i/aSrum entire, not lobate; maxillari/ palpi long and 5-jointe(l or 

 short with one or two joints; labial palpi short, with one to four 

 joints. 



Larvse — wood-eaters. The eggs are deposited in holes bored in trees 

 or bushes, and the pupa3 undergo their tranformation within the wood. 



1. ORYSSUS, Fabr. 



Oryssus, Fabr. Suppl. 1798; Syst. Piez. 47, 



Sirex Fabr. Ent. Syst. 1775. 



Sphex, Scopoli, Ent. Car. 1763. 

 Wings with one marginal and two submarginal cells, the first wirh 

 two recurrent nervures ; lanceolate cell closed; under wings without 

 inner cell. 



Antennx inserted at the nasus, 10-jointed in female, 11-jointed in 

 male, (Hartig says: 9 11-jointed, % , 12-jointed) ; the third and sixth 

 longest, the joint before the last thickened. 



Head large, rounded, wider than thorax. Mandibles short; labrum 

 entire, with two slight lateral impressions; maxillary palpi long, 

 5-jointed, labial p)alpi 3-jointed. 



Ovipositor concealed in a groove beneath, springing from the last 

 segment, long nnd very slender. 



It is ordinarily concealed in a channel beneath the abdomen, but is 

 capable of being extended, for which purpose it can be curved at the 

 base. The terebra is formed like that of Urocerus. 



The anterior lobe of the mesothorax is wide and extended back to 

 the scutellum, while the side lobes arc very small. The scutellum is 

 widened and large. 



Anterior tibise with one end spur, simple in the males, dilated and 

 incised in females. Tarsi 5-jointed in males, 3-jointed in females. 



Little is known of the larva. Latreille and Klug suppose that they 

 subsist upon the wood of standing trees. Scopoli found them upon 

 fir-trees and Latreille upon old house beams. 



Westwood has separated this genus into a subfamily Oryssides, fol- 

 lowing Dahlbom, who named it Oryssini, and Ilalliday Oryssidse. 



1. 0. hsemorrhoidalis. 



Oryssus hcEmorrhoidalis, Harris, Cat. and Inj. Ins. 1835, 9 . 



Oryssus ierminalis, Newman, Ent. Mag. v. 486. 



" Black, rough before and smooth behind, with the three last seg- 

 ments of a blood-red color ; the outer side of the fourth and fifth joints 

 of her antennae, her knees and a line on the outer edge of her shins are 

 white; her feet are dull red. Her wings are clear and transparent, 

 with a broad, smoky-brown, transverse band beyond the middle of the 



