MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID.E. 389 



tbesnbniargiual vein teriiiiuates in ji short orpunctiforin marginal vein 

 Just before the middle of the wiug; and there is a distinct oblique stigma) 

 vein, usually three times as long as the marginal, with som«'times a 

 distinct backward directed branch; the costal cell is ojk'U ana the basal 

 uervure is present, although faint or subobsolete. 



Abdomen hmg-oval, subtruncate or bnt slightly i)ointed at apex, the 

 petiole in the ? is usually short, in the $ long, woolly, or i)ubescent; 

 the second segment occupies most of the remaining surface and has 

 sulci at base above. 



Legs davate, pubescent, or pilose, the basal joint of i>osterior tarsi 

 twice as long as the second. 



Dr. Forster erected the genus Entomacis upon specimens with a 

 " heart-shaped i)iece*' cut out of the apex of the front wing, but this 

 character in itself will not hold to found a genus, and I have here joined 

 it to Hemilexis, as I can find no other character to separate them. 1 

 have species with emarginate, slightly emarginate, and entire wings, 

 but in all other essential characters, viz, the 13-jointed antenna' and 

 two furrows on the mesonotum, they agree with Hemilexis, so that if I 

 have properly identified these genera they should be united. 



Nothing is known of the parasitism of the genus, except what Yots- 

 ter tells us: that he bred specimens of an Enfoitiacis from a sjjider's 

 nest. In all ])robability the spider was already infested with a Dipter- 

 ous parasite, Leucopis sp., and the Diapriid came from the Dipteron. 



Three species are known to me, separated as follows: 



Apex of wings iiiorc or less emargiiiiited, stignial vein hmger than marginal. 



Anteunit* yellow, giadn ally incrassated, mouilirorm, the last joint large, fusiform, 

 fuscons. $ . 



Legs reddish-yellow; itetiole l»lack H. subemauginata, sp. nov. 



Antennie subclavate, snbnioniliform, the llagcllum fnscous. 9 . 



Legs anil petiole, honey -yellow H. mkllipktiolata, Ashm. 



Apex of wings entire, stigmal vein more? than twice as long as the marginal. 



Antennie tiliforni, fnscous, the first and second llagellar joints elongate, the second 

 the shorter and ]»rodnced toward one side at apex, the following 

 joints siibmoniliform. <? . 



Legs rufous; trochanters, til)ia% and tarsi yellow H. californica, sp. nov. 



Antennie tiliform, brownish-yellow, the second dagellar joint a little longer than 

 the first and third, g . 

 Legs honey-yellow H. subkm akginata, sp. nov. 



Hemilezis subemarginata, sp. nov. 



(PI. XVI, Fig. 4, 9.) 



9. Length, 1.4""", Polished black, impunctured; antennae and legs 

 reddish-yellow. Head subglobose, well rounded before and behind. 

 Mandibles rufous, projecting, bidentate at tips. Anteniue 13-jointed, 

 gradually thickened toward tips, the last joint large, fusiform, larger 

 than the two preceding united; flagellar joints one to four cylindric, 

 subequal, the joints beyond to last mouiUform, loosely joined. Thorax 



