1865.] 101 



the base. Abdomen subglobose or subovate, faintly compressed, smooth 

 and polished, stained with piceous above ; petiole elongate, stout, lon- 

 gitudinally striated, sometimes nearly as long as the rest of the abdo- 

 men and inserted to the latter on a line with its dorsal surface. Length 

 li — 2 lines; expanse of wings 2£ — 3-} lines. 



Collection. — Ent. Soc. Philad. Four specimens. 



Sometimes varies from dark-brown to very pale chestnut-brown. 



Genus CHALCIS, Fabr. 

 Chalcis robusta. n. sp. 



Black, very robust; face golden-sericeous; tegulse and legs, except tbe coxae 

 and the posterior femora within and a large black spot on the outside, bright 

 yellow; wings nearly hyaline; abdomen subsessile, ovate and shining. 



Black, clothed with a short golden-yellow pubescence; head broader 

 than the prothorax, the face, cheeks and occiput densely clothed with 

 gulden pubescence ; antenna? inserted on the middle of the face, black, 

 scape polished, flagellum robust, of uniform thickness and opaque. 

 Thorax closely and rather deeply punctured, opaque ; scutellum some- 

 what produced behind, carinate at tip which is densely clothed with 

 golden pubescence, as well as the extreme sides near the base ; meta- 

 thorax roughly rugose; tegulae bright yellow. Wings faintly -tinged 

 with pale fuscous. Legs, excepting the coxte, bright yellow ; posterior 

 coxa? robust, polished; their femora much swollen, black within except 

 near the tip above and on the outside a large oblique black spot not 

 reaching the upper margin, but confluent beneath with the black of 

 the inside; in one specimen this spot is entire and not confluent beneath 

 with the black of the inside, and the apical third within is yellow ; 

 lower margin armed with a row of nine or ten small obtuse black teeth, 

 and a large obtuse one near the base ; their tibiae curved, acute at tips ; 

 tarsi black at tips. Abdomen subsessile. robust, convex, ovate, some- 

 times faintly compressed and pointed at tip, smooth and polished, and 

 the posterior margins of the apical segments more or less fringed with 

 yellowish pubescence. Length 2f — 3-V lines; expanse of wings 5 — 6 

 lines. 



Collection. — Ent. Soc. Philad. Four specimens. 



Chalcis incerta, n. sp. 



Very closely allied to the preceding species, but differs as follows: — 

 The pubescence is more silvery instead of golden ; the tegulae are yel- 

 lowish-white ; the tibiae and tarsi are yellowish-white, the four anterior 

 femora are black with their tips and sometimes their apical one-half or 

 one-third yellowish-white, and the posterior femora are entirely black 



