286 HTMENOPTEEA. 



3. Mesoleius montezuma. (Tab. XII. fig. 4.) 



Niger ; ore, facie et orbitis proparte, tegulis, scutello, pedibus anterioribus, abdominis segmentis basi ventreque, 



flavis ; alis hyalinis, nervis nigris. 3 . 

 Long. 8 millim. 



Hab. Mexico, Ciudad in Durango 8100 feet (Forrer). 



Shining, impunctate, covered with a short, sparse pile. Antennae long, slender, 

 nearly one fourth longer than the body. The mouth, the mandibles (except at the 

 apices, which are piceous), the inner orbits of the eyes broadly, a large mark in the 

 centre of the face, the tegulse, the scutellum, the postscutellum, the four anterior legs 

 (except the bases of the coxse and the tips of the tarsal joints), the greater part of the 

 hind femora and tibiae beneath, the tibial spurs at the base, the basal segments of the 

 abdomen broadly, the other segments narrowly at the base, and the ventral surface, 

 yellow, tinged slightly with fulvous. Hind legs longish (the tarsi considerably longer 

 than the tibiae), rather stout, the apical part of the claw bare. Head a little broader 

 than the mesothorax ; eyes large ; the face not buccate, the clypeus slightly and broadly 

 incised. Scutellum slightly convex. Metathorax without keels, having a gradual slope ; 

 the sides slightly aciculated and pilose. Abdomen not much longer than the head and 

 thorax together, becoming gradually thicker towards the apex ; petiole narrowed at the 

 base, becoming gradually wider towards the apex. Wings a little shorter than the 

 body, without an areolet. 



TRYPHON. 



Tryphon, Fallen, Specim. novam Hym. (1813) ; Holmgren, Sv. Ak. Handl. 1855, p. 185. 



A very extensive genus. The species of this group are not clearly defined generi- 

 cally ; and it is doubtful if many of the American species placed in Tryphon really 

 belong to that genus as limited by Holmgren. The Tryphon mexicanus of Cresson 

 certainly cannot, as it has the claws pectinate. 



i. Claws pectinate [Polyblastus T\. 



1. Tryphon mexicanus. 



Tryphon mexicanus, Cresson, Proc. Acad. Phil. 1873, p. 391 ( 6 ) 1 . 

 Hab. Mexico, Mirador 1 (Br. Sartorius). 



ii. Claws simple. 



2. Tryphon montezuma. (Tab. XII. fig. 2.) 



Niger ; mandibulis, femoribus anterioribus abdomineque (basi excepta) runs ; palpis, tibiis tarsisque anteri- 

 oribus, flavis ; alis fuscis, nervis nigris. <$ . 

 Long. 7 millim. 



Hab. Mexico, Ciudad in Durango 8100 feet (Forrer). 



