MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPIDiE. 41 



the iiagellum, curved, narrowed at the base, the joints of the flagelhim 

 not longer tlian thick. Abdomen elongate, pointed-ovate, two and a 

 half times longer than the thorax, black, highly polished, with a few 

 hairs at tip, the first and third segments about equal, the second 

 slightly shorter. 



Habitat. — Jacksonville, FUi. 



Type iu Coll. Ashmead. 



DISSOMPHALUS Ashmead gen. nov. 

 (Type JJ. xaniho2)iif:.} 



Head in S oval, very little longer than wide, with a long frontal 

 carina; eyes oblong-oval, extending to base of mandible, nearly bare, 

 or with few bristles ; ocelli 3, distinct ; in 9 head oblong ; eyes small oval ; 

 ocelli wanting. 



AntenniD inserted rather far apart, 13-jointed, filiform, snbmonili- 

 form, the first flagellar joint always smaller than the second. 



Maxillary palpi 4-jointed; labial palpi 3-jointed. 



Mandibles not very broad at tips, truncate, with -4 teeth. 



Thorax in S subovate, the prothorax not very long, constricted into 

 a collar anteriorly, the pronotum usually very short; mesonotum witli 

 or without furrows; scutellum with a transverse impressed line at 

 base; metathorax subquadrate, truncate behind but the angles rounded ; 

 in 9 with the prothorax long, narrowed anteriorly; scutellum distinct; 

 metathorax quadrate, very slightly contracted at base. 



Front wings in S with two basal cells of an equal length, the trans- 

 verse medial nervure being straight, an oblong-quadrate stigma and a 

 long stigmal vein; 9 always ai)terous. 



Legs in S slender, the femora not much swollen; tibial spurs 1, 2, 2; 

 tarsi a little longer than the tibia^, the basal joint nearly as long as 

 the remaining joints united; in 9 with the femora swollen, the tibiie not 

 spinous. 



Abdomen iu 6 oval or rotund, depressed, subpetiolate, the second 

 body segment always the longest and with two very small, round, 

 wart-like tubercles, usually covered Avitli short hairs, sometimes i>laced 

 in a fovea or depression and variously situated, being sometimes close 

 together or widely separated; in 9 long, cylindric-ovate, the apical 

 margins of segments 3 to 5 more or less emarginate or sinuate. 



This new genus can always be distinguished in tlie male sex by the 

 two minute wart-like, pubescent tubercles on the second abdominal 

 segment and by the straight transverse median nervure; otherwise it 

 bears a close resemblance to Isohrachium. It agrees with that genus, 

 in having the eyes extending close to the mandibles, in its mesonotal 

 characters, and in having (comparatively) slender legs; but besides 

 the differences already mentioned, Avhich are sufiicient to distinguish 



