128 MEMOIRS OF THE QVEEXSLAXD MISEUM. 



Marginal vpin distinctly longer than the stigmaL 



Frons not prominent. 



Postmarginal vein a little longer than the mar- 

 ginal. Stigmal vein very short. Axilla? a 

 little separated . . Aphidekcyrtus Ashmead. 



Postmarginal vein shorter than the stigmal. 

 Funicle joints mneh longer than wide. Scape 

 short . . . . Syrpophagus Ashmead. 



Stigmal vein distinctly longer than the post- 

 marginal. Marginal vein very much longer 

 than the postmarginal. 



Frons rather broad. Funicle joints barely 

 wider than long. Inner tooth of mandible 

 broadly truncate. Marginal vein over 

 twice the length of the stigmal . . 



EcHTHROBACCA Perkins. 

 Frons prominent . . . . Atropates Howard. 



Nonmetallic. 



Postmarginal vein absent. 



Funicle joints increasing m length distad. wider than long. Frons not 

 prominent . . . . . . . . . . Astymachus Howard. 



Postmarginal vein distinct. 



Fnnicle joints all longer than wide. Frons moderately broad. Hind 

 tibial spurs double .. .. .. . . NEA.STyMACHus Girault. 



Tribe EUCOMINI. 



Genus EUCOMYS Foerster. 



This genus resembles closely Eimtmion in nearly everything except venation and the 

 mandibles. 



1. EUCOMYS HIBISCI new species. 



Female: — Length, 1.33 mm. 



Deep orange yellow, the abdomen dark metallic purple ; legs and scape paler yellow ; 

 rest of antenna concolorous or nearly. Pronotum and vertex washed with purple. Fore wing 

 embrowned to apex from a little out from base but clear disto-caudad, in a transverse, slit-like 

 spot just distad of postmarginal vein, in a distinct not very narrow transverse band from the 

 distal fourth or less of submarginal vein and along the caudal margin proximad of this 

 cross-band. A clump of coarse black setae at the proximal margin of the cross-band of fore 

 wing, cephalic half, followed proximad by over a half dozen lines of normal discal cilia. Post- 

 marginal and stigmal veins rather long, suhequal, the stigmal curved, the marginal distinctly 

 shorter, about twice longer than wide, not half the length of tlie stigmal vein. Oblique hairless 

 line obscure, of necessity short because of the hyaline, naked cross-band. Head lenticular, the 

 scrobes short, the surface finely transversely sheened, the frons and vertex with thimble 

 punctures; lateral ocellus over their own diameter from the eyes. Scutum very finely longi- 

 tudinally lined, hispid. Axillse meeting. Apical tuft of hairs on scutellum black. Hind legs 

 more or less black. Flagelhim clavate, compressed distad, the club short, truncate; scape 

 slender. |iiir]ilp at ti]i aliove: |ii'clii-pl ratlier long, a little longer than funicle 1, which is subef|iial 



