No. 22.] HYMENOPTERA OF CONNECTICUT. 525 



tip; wings hyaline, veins brown; metanotum blackish, legs 

 blackish with a tinge of green, tarsi yellowish. 

 New Haven. 



Euperilampus Walker. 



E. triangularis Say. 



Length 5 mm. ; mostly greenish and bluish ; head green with 

 a violaceous reflection, each side of face vertically striate, occiput 

 transversely and longitudinally striate, violaceous; pronotum 

 greenish, scutel not emarginate at tip, but pointed; wings dusky 

 on apical half; tarsi yellowish; abdomen with the anterior half 

 violaceous, the rest green with a violaceous reflection. 



EUCHARID^E. 



This is chiefly a tropical group, and, so far as our knowledge 

 goes, confines itself to attacks on ants. 



Key to Genera. 



1. Females: antennas n-jointed 2 



Males: antennae 10- to 13-jointed; scutellum not developed 



into processes 3 



2. Joints of antennae not serrate but cylindrical; scutellum 



simple, neither bidentate nor produced into long pro- 

 cesses; thorax smooth, polished; petiole of abdomen 



abruptly enlarged at apex Pseudometagea p. 525 



Joints of antennae serrate or subdentate; scutellum subcon- 

 ically elevated posteriorly; wings with a substigmal cloud 

 or fascia Chalcura p. 526 



3. Antennae not branched, 10- to n-jointed; flagellar joints cyl- 



indrical, not moniliform; petiole of abdomen abruptly 



enlarged at apex; thorax smooth Pseudometagea p. 525 



Antennae with more than four branches; wings with a sub- 

 stigmal cloud or fascia Chalcura p. 526 



Pseudometagea Ashmead. 

 P. schwarzi Ashmead. 



Female and male: length 1.5-2 mm.; mostly black; antennse 

 fuscous, pedicel yellowish beneath, head, except region around 

 ocelli, smooth, polished and impunctate ; parapsidal furrows and 

 a central furrow indistinctly outlined by punctures ; scutel conical- 

 convex, with a longitudinal median furrow, the apex emarginate 

 but not bidentate ; pleurse and metathorax rugose ; male antennse 

 not subclavate as in the female, but filiform. 



