390 BULLETIN 15, UNITED STATES NATIONAL MUSEUM. 



short, rounded before, with two short, abbreviated impressed lines be- 

 hind, not extendinu forward to the middle of the mesonotum ; scntellnm 

 with a transverse fovea at base; metanotum tricarinate, the truiicature 

 bounded by a carina above, slightly produced at the lateral angles. 

 Wings hyaline, fringed, slightly einargiuated at apex; stigma! nervure 

 oblique, three times as long as the short marginal; basal nervure sub- 

 obsolete. Abdomen oblong-oval, truncate at apex, iiolished, shining; 

 the petiole a little longer than thick, finely striated; the extreme base 

 of second segment with some stria^. 



The S agrees well with the 9 except the mesouotal furrows are a 

 little longer, the head larger, antennie filiform, the second fiagellar joint 

 a little longer and stouter than the others, the others about three times 

 as long as thick, while the wing venation is darker, more distinct, the 

 stigmal vein shorter, with a slight backward directed branch from its tip. 



Habitat. — District of Columbia. 



Types in Coll. Ashmead. 



Hemilexis mellipetiolata Ashm. 

 Can. Ent., \ix, p. 196; Cres. Syn. Hym., 251. 



9 . Length, 1""". Polished black, impunctured; scape, legs, and ab- 

 dominal iietiole, honey-yellow; tlageHum rust-brown. Antenna^ 13- 

 jointed, long, gradually incrassated toward tips; flagellar joints 1 to 5 

 subcylindric, the following submoniliform. Thorax without furrows, 

 scutellum foveated at base; metapleura pubescent. Wings hyaline, 

 strongly fringed, the apex slightly emarginated, the stigma and ner- 

 vures pale yellow, the stigmal nervure much longer than the short 

 stigma. Abdomen oval, truncate at apex, black, shining, the jietiole 

 long, yellow, about three times as long as thick, finely striated. 



Habitat. — Jacksonville, Fla. 



Type in Coll. Ashmead. 



Quite distinct from the other spe'cies in the long yellow petiole, 

 absence of mesonotal furroAvs, pubescent metapleura and in the relative 

 length of autennal joints. 



Hemilexis californica, sj). nov. 



S. Length, 1.5""". Polished black, impunctate; antenna^ brown, the 

 scape Jind legs yellowish, the hind coxte and thickened parts of 

 the femora and tibia' fuscous or piceous. Head more transverse than 

 in the preceding species. Mandibles rufous. Antennae 13-jointed, 

 filiform, the first flagellar joint long, three times as long as the pedicel, 

 cylindrical, the second stouter and slightly curved and dilated toward 

 apex, the following joints still shorter, loosely joined, from an elliptic- 

 oval to moniliform, the last ovate. Thorax with the parapsidal furrows 

 wanting anteriorly; scutellum with a deep fovea all across the base, 

 metapleura finely rugose. AViugs hyaline, fringed, the iiervures pale 



