172 [January 



Agapostemon semiviridis, n. sp. 



Metallic green; antennpe, legs and abdomen black, the second, third and 

 fourth segments of the latter with a white fascia at base, broader on each side ; 

 wings hyaline, apical margins dusky. 



Female. — Head bluish-green, finely and very closely punctured, 

 clothed with pale pubescence, longer on the cheeks and slightly mixed 

 with black on the vertex ; cheeks finely aciculate ; anterior margin of 

 the clypeus piceous, truncate and fringed with long pale pubescence ; 

 mandibles piceous ; antennae piceous, the flagellum paler. Thorax 

 bright golden-green, sometimes tinged with coppery, very closely and 

 minutely punctured, or very finely granulate, clothed with short pale 

 pubescence, slightly mixed with black above ; scutellum brilliant golden- 

 green, sparsely punctured; sutures between the mesothorax, scutellum. 

 postscutellum and metathorax tinged with deep blue in certain lights ; 

 metathorax covered with close, fine stride, those at the base longitudinal 

 and radiating posteriorly, those on the sides transverse or somewhat 

 oblique, posterior face with a large, suborbicular, depressed space en- 

 closed by a sharp, well-defined carina, and covered with fine striae which 

 radiate from the tip of the metathorax ; a densely pubescent semicircu- 

 lar space just behind the tubercles which are polished; teguhie rufo- 

 testaceous. Wings hyaline, slightly iridescent, the apical margins 

 tinged with pale fuscous ; nervures brownish. Legs pale piceous, 

 densely clothed, especially the posterior pair, with pale ochraceous pu- 

 bescence ; anterior tibiae and all the tarsi rufo-testaceous ; anterior 

 coxae green. Abdomen ovate, opaque black, the extreme base, the 

 lateral and apical margins clothed with short pale pubescence : basal 

 margins of the second, third and fourth segments above with a band of 

 dense, white, appressed pubescence, dilated on each side and more or 

 less interrupted on the third and fourth segments ; apical segment 

 clothed with coarse black pubescence, with a longitudiual depressed 

 space on the disk fringed with pale pubescence ; venter piceous, clothed 

 with pale brownish pubescence. Length 6 lines ; expanse of wings 9 

 lines 



Collection. — Ent. Soc. Philad. Three specimens. 



This may be the $ of A. femoralis Guer. 



Agapostemon festivus, n. sp. 



Bright green, abdomen tinged with blue: anterior half of clypeus, labrum. 

 mandibles, base of antennae, most of legs, and basal margin of first three or 

 four segments of abdomen, yellow; wings hyaline. 



Male. — Head green, golden on the face and tinged with obscure 

 blue on the vertex, finely and closely punctured, clothed with pale pu- 



