18G5.] 121 



s. Cerceris rufinoda, n. sp. 



Black ; face, two spots on collar, toguliE, spot under the wing, two spots 

 on scutellum, tips of femora, tibise and tarsi, and bands on second and four 

 following segments of abdomen, yellow ; basal segment rufous ; wings dusky. 

 Male. — IJlack, closely and rather deejily punctured ; the face en- 

 tirely, extending up on each side nearly to the summit of the eyes, a 

 narrow line between the antennte, mandibles except tips and the scape 

 in front, lemon-yellow ; antennae fulvous, the flagellum dusky above, 

 the scape above, and basal joint of flagellum, blackish. Thorax : an 

 interrupted band on the collar, tegulag, a spot beneath the wings, a 

 rounded spot on each side of the scutellum, and a transverse line on 

 the postscutellum, lemon-yellow; the scutellum sparsely punctured ; 

 the triangular basal space of the metathorax transversely striated at 

 tip, with a central longitudinal impressed line. Wings tinged with 

 fuscous, nervures fuscous. Legs : coxge, trochanters, and most of the 

 femora, black ; tips of all the femora, especially the two anterior pairs 

 beneath, all the tibise, except the tips of the posterior pair, and base 

 of the tarsi, lemon-yellow ; posterior femora ferruginous at base ; most 

 of the tarsi dusky. Abdomen closely and rather coarsely punctured, 

 the segments strongly contracted at base; first segment entirely and 

 the base of the second, bright rufo-ferruginous, the latter with a broad, 

 subapical, lemon-yellow band narrowly margin before with black ; the 

 four following segments each with a narrower apical band of the same 

 color, slightly attenuated on the middle anteriorly; the venter piceous- 

 black, ferruginous at base. Length 4 lines; expanse of wings 6 J 

 lines. 



IJah. — Eocky Mountains, Colorado Territory. (Ridings.) Coll. Eut. 

 Soc. Philad. 



One S specimen; 9 unknown. A handsome little species, with 

 the ba.sal segment entirely red, as well as the base of the second seg- 

 ment. 



!>. Cerceris Blakei, n. sp. 



Black: sides of the face, clypeus, mandibles, scape in front, two spots on 

 collar, tegulse, spot on each side of scutellum, line on postscutellum, tibia; and 

 tarsi, and apical fasciae on abdomen, much narrowed on the middle, yellow ; 

 . two basal segments dull ferruginous: legs mostly fulvous; wings fuscous. 

 Fdiutlc. — Black, closely and deeply punctured; sides of the tace, 

 clypeus, mandibles except tips, a minute dot behind the summit of the 

 eye, and the scape, yellow; the face silvery in certain lights, especially 

 the lateral lobes of the clypeus ; above the clypeus a pale ferruginous 

 dot; clypeus produced in the middle, convex ;ibove, concave beneath, 

 the apical margin subtruncate and narrowly margined with black ; fla- 



