MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^. 197 



broad at base, wliile the anteuiiiie are clavate, black, the scape yellow, 

 tlie first and second fiiuiclar joiuts equal, twice as loiig as thick, the 

 third and fourth, small, transverse. 



Haeitat. — District of Columbia and Arlington, Va. 



Types in Coll. Ashme;ifl. 



Prosacantha macrocera Ashm. 

 Eut. Am. Ill, p 117, (? ; Crers. Syn. Hym., p. 313. 



S. Length, 1.8'""'- Black, shining, faintly punctate; head wide, 

 the frons and fiice striated; mandibles large, rufous; legs rufous. An- 

 teun;e 12-Jointed, very long, cylindrical, brown-black, the scape rufous; 

 first and third fnniclar joints about equal in length, a little shorter than 

 the second, the third angulated outwardly a little before the middle; 

 fourth joint and tlie following, longer. Scutellum polished, sparsely 

 ])unctate at base. Post-scutellar spine hirge, acute, erect, very slightly 

 curved. Angles of metathorax acute. Wings subfuscous, fringed. 

 Abdomen oblong-oval, shining, but minutely sjiarsely punctate, the 

 first and second segments and the third, on disk, longitudinally stri- 

 ated or aciculated ; the first segment brownish or dull rufous, rest of 

 the segments black. 



Habitat. — Jacksonville, Fhi. 



Type in Coll. Ashmead. 



Prosacantha xanthognatha, sp. nov. 



S. Length, 1.5""". Black, shining; head very wide, polished, the 

 frons smooth. The inner orbits and lower part of face striated; man- 

 dibles large, yellow, the teeth in the left mandible about equal, in the 

 right with the outer the longer; thorax and scutellum closely punctu- 

 late or minutely rugulose, sliining, tlie parapsidal furrows slightly in- 

 dicated posteriorly ; legs brownish-yellow. Antennge 12-jointed, brown- 

 black, the scape yellowish; first flagellar joint a little shorter than the 

 second; fourth and following longer than the second. Post-scutellar 

 spine triangular, acute, oblique. Angles of metathorax subacute. 

 Wings subfuscous, not fringed, the nervures brown. Abdomen oval, 

 black, shining, the first and second segments coarsely striated, the 

 third and following punctate. 



Habitat. — Jacksonville, Fla. 



Type in Coll. Ashmead. 



Closely allied to P. macrocera but slightly smaller, the thorax more 

 closely punctate, the antenn;e shorter, the third flagellar joint not an- 

 gulated, while the wings are not fringed. 



Prosacantha striativentris, sp. nov. 



i. Length, 1.5""". Black; the head and abdomen shining; the 

 thorax opaque, minutely, closely punctulate; abdomen wholly longi- 



