1865.] 4fi7 



venter clothed with fine fuscous pubescence. Length 5 lines; expanse 

 of wings 8j lines. 



One specimen. Comes very near to Say's description of A. bicolor, 

 but the wings of the present species have a fuscous cloud, and the 

 metathorax is very finely sculptured and not with " crowded, dilated, 

 superficial punctures." 



2. Astata unicolor, Say. 



Astata unicolor, Say, Long's Second Expedition, ii. p. 337. Smith, Brit. Mus. 

 Cat. Hym. iv, pi. 8, fig. 1, % . 



One % specimen. 



Fam. BEMBICID.E. 



Genus BEMBEX, Fabr. 



1 . Bembex fasciata, Fabr. 



Bembex fasciata, Fabr. Syst. Piez. p. 224. Dahlb. Hym. Europ. i, p. 184. 

 Bembex Spinolce, St. Farg. Hym. iii, p. 277. 

 Six 9 , two $ specimens. 



2. Bembex Sayi, n. sp. 



Black ; orbits, clypeus, labruni, prothorax, two lines on mesothorax, two 

 large marks on pleura, posterior margins of both scutellums, semicircular line 

 on metathorax, most of legs, and broad bands on abdomen, the second enclos- 

 ing two black spots, yellow or greenish-yellow ; wings hyaline. 



Female. — Black, minutely punctured, thinly clothed with a fine hoary 

 pubescence, most dense on the occiput, metathorax and base of abdomen ; 

 orbits, not reaching the summit before, entire behind, a spot on middle 

 of vertex, a larger one between the insertion of the antennae, clypeus, 

 labrum, and mandibles except tips, all yellow or greenish-yellow; in 

 one specimen the clypeus has an obscure dusky spot on each anterior 

 corner; antennae black, the scape yellowish beneath, the flagellum be- 

 neath rufo-testaceous. Thorax : most of prothorax, lateral margins of 

 mesothorax. two distant, longitudinal lines before, abbreviated behind, 

 as well as a short transverse line on the posterior margin, a large irreg- 

 ular mark on the pleura anteriorly, another smaller one beneath the 

 posterior wings, posterior margin of scutellum, dilated on each side, 

 narrow, subobsolete posterior margin of postscutellum, an entire semi- 

 circular line on metathorax, as well as most of its sides, and two small 

 oblique lines on its posterior face, all yellow or greenish-yellow ; in the 

 small specimen these markings are less developed, the two longitudinal 

 lines on mesothorax are abbreviated before as well as behind and the 

 short transverse posterior line is wanting ; tegulae yellow before, black- 

 ish behind. Wings hyaline, nervures fuscous. Legs yellow ; the coxae, 

 except a yellow spot on the two anterior pairs beneath, trochanters, the 

 femora behind, except tips, the intermediate pair at base beneath, and 



