MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^. 255 



Isostasius miisculus Ashni. 



(PI. XI, Fig. 5, 9.) 

 Can. Eut., XIX, p. 126; Cress. Sjni. Hyiii., p. 249. 



9. L(aigtlj, 1.20""". Black, shining-; liead transverse, closely, finely, 

 microscopically punctate and subopaqne, the lateral ocelli nearer to the 

 front ocellus than to the margin of the eye. Antenn* 10-Jointed, 

 piceous, or dark brown, the scape clavate, the pedicel longer and 

 thicker than the first two funiclar joints, the first and second funiclar 

 joints cylindric, nearly ecpial, the third and fourth small, trauvsverse; 

 club enlarged, 4-jointed, the joints quadrate. Thorax with scarcely a 

 trace of furrows. Scutellum transverse, convex. Mesoi)leura acicu- 

 lated. Legs brown, the coxae black, the trochanters, base and apex of 

 femora, and tibiiP and all tarsi honey-yellow. Tegulte black. Wings 

 hyaline, the submarginal vein terminating in a small, black knob. 

 Abdomen pointed ovate, polished, black, the basal segment rugose. 



Habitat. — Jacksonville, Fla. 



Tyi)e in Coll. Ashmead. 



Isostasius fuscipennis, sp. nov. 

 2. Length, 1"'". Black, shining; head anteriorly faintly sha- 

 greened, i)osteriorly transversely aciculated, the lateral ocelli about 

 twice their width from the margin of the eye. Antenn.T brown-black. 

 Thorax polished, with faint traces of furrows only posteriorly, the base 

 of the middle lobe thus formed projecting slightly upon the scutellum; 

 mesopleura polished, impunctured, metapleura subopaque, sha- 

 greened; scutellum convex, shining, margined posteriorly with a fine 

 whitish pubescence. Tegulai black. Wings fuscous. Legs piceous, 

 the anterior femora, tibije, and tarsi, yellowish; middle and hind tarsi, 

 pale rufous. 



Abdomen as long as the head and thorax, polished, the first seg- 

 ment striated, the second, at base sulcate. 



Habitat. — Washington, D. C. 



Type in Coll. Ashmead. 



Described from a single specimen, collected by Mr. E. A. Schwarz. 



Isostasius arietinus Prov. 

 Add.et CoiT., p. 183. 

 Baoneitra arietina, Prov., Add. et Corr., p. 403. 

 9. Long. 11 j)ce. Noir, avec la bonche, le scape des autennes et Ics pattes, d'nn 

 bean jaune-niiel. Tete aussi large que le thorax, a antonnes fortes, le scape fort, 

 arqne, jaune ainsi que I'article qui le suit, le reste formant une forte massue brune 

 recourbt^e en corne de boiler. Mesonotum a\ec 3 sillons bien distincts. Ailes hya- 

 lines, avec la sous-niarginale brune se terniinant dans nn stigma grand et (^paissi qui 

 donne naissance a nn radius se dirigeant vers le soinmet de I'aile. Pattes jaunes, 

 hanches noires. Abdouion sessile, ]>oli, bnllant, droit, tariere iiou sortante. La 

 tete et le thorax sont tres tinement ponctucs et les 2 ocelles bnsilaires sout plus rap- 

 l)roclios de I'apical que du coin interne des yeux. {Provancher.) 



Habitat. — Cap-Rouge, Canada. 

 Unknown to me. 



