F()HM<)lU>i — CKAHKOMD.K. 121 



PtitMd/irrttn hjw the labnuii Miibtriiin;riilHr hikI obtusely |M)int<'<l ; the 

 mHii(lil)h>s lar|f»', ri»l)ust uihI bnuulcr towiinls ti|M'x ; the ulxldinen has 

 a very short, flattened jH'tiole, and tht' apieal se^rnient 9 if* eonvex 

 alM)ve, subconiprcKsed and acute at apex. Two s|)eciejj of small size 

 arc known. 



I)io(loiitio< han the labruni deeply eniarginate, the mandibles lon^ 

 and slender, not br.)adtr at apex ; the ab<loinen is snbs<'ssile, with 

 the apical dorsal sej^ment 9 rather broad, flattened and triangular. 

 The single s|)ucie» is quite small in size. 



Family CRABRONIDiE. 



This family may be at onee distinguished by the neuraticm of the 

 anterior wings, which have oidy one submarginal and two discoidal 

 cells (except in Oxijbelm, where the submarginal and tii-st discoidal 

 cells are confluent) ; this easily recognized character varies but 

 slightly in the genera, and is different from any other family i>f this 

 series. The head is generally large, and nearly s(puire when viewed 

 from above, and sometimes broader than the thorax ; the dypeus is 

 short and broad, narrowed to a point at the sides, the eyes large and 

 prominent, and the antennte inserted close to the base of the clypeus ; 

 the abdomen varies much in form, from petiolate to sessile. 



The following table will assist in separating the genera: 



Table of Genera. 



Kyes (U^jply emarginate withiu ; alidoineii long, elavate; marginal cell long, 

 pointed at apex, nut appendiculate ; a second submarginal and a 

 third discoidal cells indistinctly defined; neiiratioii of posterior 



wings complete Trypoxylon Ija\.x. 



Eyes not emarginate; marginal cell obtuse or truncate at apex, appendiculate: 

 neuration of posterior wings incomplete. 

 Submarginal cell not confluent with the first discoidal cell ; postscutellum and 

 metathorpx unarmed. 

 Eyes not hairy ; mandibles entire. 

 Abdomen distinctly petiolate, the first segment terminating in a node. 



Rhopaluni Kirhy. 

 Abdomen subpetiolate or sub.sessile, the first segment not terminating in a 

 node. 

 ,v Second discoidal cell broadest at apex, shorter than the first discoidal 

 cell, which is elongate diamond shaped. 

 Last doi-siil segment of abdomen 9 acutely produced, narrowed, com- 

 pressed and grooved towards apex ; % antennse and anterior tibise 

 not expanded C'rabro Fabr. 



TBAN8. AMEK. KNT. 80C. (16) 8UPPL. VOL. 1887. 



