MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPIDiE. 41 



the flagerium, curved, uarrowed at the base, the joints of the flagellum 

 uot longer than thick. Ab(h)meu elongate, poiuted-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, Fla. . 



Type in Coll. Ashmea«l. 



DISSOMPHALUS Aishiiieiul ^en. nov. 

 (Type 1). xanthopuH.) 



Head in $ 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. 



Anteniue inserted rather far apart, 13-jointed, filiform, submonili- 

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



Maxillary i>alpi 4-jointed; labial palpi 3-jointed. 



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



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

 a collar anteriorly, tlie pronotum usually very short; mesonotum with 

 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 w ings in $ with two basal cells of an equal length, the trans- 

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

 long stigmal vein ; 9 always apterous. 



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

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

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

 spinous. 



Abdomen in i oval or rotund, depre8se«l, subpetiolate, the second 

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

 wart-like cubercles, usually covered with short hairs, sometimes placetl 

 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 the 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 Isobrachhim. 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, which are sufficient to distinguish 



