AMERICAN HYMENOPTERA. 29 



Synopsis of the North American species belonging to the 

 Genera EEUCOSPIS, SMICRA and CHALCIS. 



BY E. T. CRESSON. 



Genus EEITCOPSIS, Fabr. 



Abdomen petiolate , bnlbiventris. 



Abdomen sessile or subsessile. 



Body black, immaculate, without metallic lustre; wings black, hyaline at 



tip apicalis. 



Body black, immaculate, with a green metallic lustre ; wings hyaline. 



Abdomen green-sericeous at apex ; the ovipositor reaching to the apex of 



scutellum mexicana. 



Abdomen bright golden at apex; ovipositor not reaching to base of second 



abdominal segment Sumichrastii. 



Body more or less marked or banded with yellow or red : 



Abdomen short, broad, much narrowed at base; posterior femora very 

 large, broadly margined above with yellow; abdomen with two or 



three yellow bands ; wings fuliginous tcxana. 



Abdomen elongate, not much narrowed at base : 

 Ovipositor long, reaching to base of abdomen : 



Prothorax with lateral and posterior margins broadly yellow; scutel- 

 lum almost entirely yellow; the 9 with apex of abdomen ferrugin- 

 ous , Poeyi. 



Prothorax with lateral and posterior margins narrowly yellow; scutel- 

 lum narrowly yellow at apex atlinis. 



Prothorax with lateral and posterior margins red; scutellum red at 



apex floridana. 



Prothorax with posterior margin only narrowly yellow; scutellum 

 narrowly yellow at apex : 

 Apex of abdomen broadly yellow ; posterior femora with a yellow 



stripe beneath azteca. 



Apex of abdomen and posterior femora entirely black <lnbiosa. 



Ovipositor short, not reaching to base of second abdominal segment; pro- 

 thorax with two yellow bands; scutellum immaculate; abdomen 

 with a silvery band at apex of second and third segments. .tolteca. 



1. Leucopsis bulbiventris, n. sp. 



%. — Black, densely punctured, more or less tinged with green and purple; 

 head small, not wider than thorax, face purplish, clothed with short whitish pu- 

 bescence; antennae , theantennal grooves very deep and bright metallic 



green; mandibles small, robust, reddish at base; prothorax with a narrow, in- 

 terrupted, yellowish band near posterior margin; mesothorax more obviously 

 green over tegulae, posterior margin narrowly yellow; scutellum broad, sub- 

 quadrate, immaculate; postscutellum small, flat, transverse, rounded poste- 

 riorly, smooth and shining; metathorax green, with a patch of dense silvery seri- 



