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-
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