MONOGRAPH OF THE NOUTII AMERICAN PROCTOTRYPIDiE. 123 



Winged. 



Mesonotnm witli a median impressed line. 



Scntellum liat or sulicouvex, with a marginal frcnuni Cerapiiron .Turine. 



Sontelhmi convex, ac-uminate, -without a frennm Aphanogmus Thorns. 



Mesonotum without a furrow (= Synarsis Forst.) Apiianogmus Thorns. 



2. Mesonotum with a median impressed lim^ Cekaphron. 



Scutellum flat or suln'onvex with a frennm Cerapiiron. 



.Scutellum convex, without a frenum Aphanogim us. 



Mesonotum without a median furrow Apiianogmus. 



3. Mesonotum with a median impl-essed line Neockrapiiron, gen. uov. 



MALES. 



AnteunfB 10-jointed 3 



Antennae 11-joiuted. 



Mesonotum without a median impressed line 2 



Mesonotum with a median impressed line. 

 Scntellum depressed with a marginal frenum. 



Autennte simple Cerapiiron. 



Scntellum convex, acuminate, without a frenum. 



Antenna} serrate Aphanogmus Thoms. 



2. Scntellum convex, acuminate, without a frenum. 



AnteunjB serrate Aphanogmus Thoms. 



3. Mesonotum with a median impressed line. 



Antennie tiliform Neocerapiiron, gen. nov. 



CERAPHRON .Turine. 

 Hym., p. 303 (1807). 



Calliceras Nees, Men., ii, p. 280, 18; Thoms. Ofv., 1858, p. 302. 

 Hadroceras Forst., Beitr., p. 46 (1841). 

 Cerapiiron Forst., Hym. Stud., ii, p. 97, 1856. 

 Megaspilidea Ashm., Can. Ent., xx, p. 49 (apterous forms). 



(Type C. sulcatus Juriue.) 



Head tiansverse, when viewed from in front oblong or oval, convex, 

 impressed above the antenna^; ocelli 3, triangularly arranged; eyes 

 oval. 



Antennte inserted just above the clypens, in 9 10-jointed, subclavate, 

 the scape long, obclavate; in S , 11-jointed, filiform, pubescent, or 

 pilose. 



Maxillary palpi 4-jointed ; labial palpi 2-jointed. 



Mandibles bidentate. 



Thorax subovoid, the prothorax not visible from above, mesonotum 

 with a median impressed line, rarely entirely wanting, the scntellum 

 elongate, flattened or subconvex, with a distinct frenum; metathorax 

 short, the angles acute or i^rominent, and with 1 or 2 teeth at base. 



Front wings pubescent, with a short linear marginal vein and a 

 rather long curved stigmalvein; apterous individuals of frequent oc- 

 currence. 



Abdomen subsessile, ovate, compressed beneath, subconvex above 

 and longer than the thorax, the second segment large, striolate at base. 



