67 



below. Wings hyaline, highly iridiscent. tinged with fuscous; the ner- 

 vures and stigma black. Male. Length 7 mm. Chinandega, Nicaragua. 



Head strongly rugosely punctured, almost reticulated on the vertex. 

 Apex of clypeus black, transverse in the middle, the sides rounded. Man- 

 dibles with a yellow streak on the basal half above. Metanotal area 

 smooth and shining, a narrow furrow down the centre. Pygidial area 

 aciculated, sparsely punctured, not much narrowed towards the apex; 

 epipygidium with a shallow incision at the apex. Comes near to C. ob- 

 soleta. 



3055 Cerceris Bakeri sp. nov. 



Black, the clypeus except at the sides and apex, a large mark, 

 rounded on the outside, on the upper inner orbits, touching the eyes, 

 the antennal scape below, two broad lines on the pronotum, the scu- 

 tellums, the metanotal area, the metanotum except on the furrow, the 

 first abdominal segment, a broad oblique mark extending almost to the 

 apex, the apex of the third segment narrowly, of the fourth more broadly, 

 and of the fifth still more broadly, yellow. The basal five and the apical 

 two joints of the flagellum, brownish rufous below; wings hyaline, the 

 apex broadly smoky, tinged with violaceous, the nervures and stigma 

 black. Legs black; the four anterior tibiae and tarsi in front and the 

 posterior tibiae all round to shortly beyond the middle, yellow. Female. 

 Length 8 mm. Chinandega, Nicaragua. 



Clypeus flat, its apex transverse, the sides almost straight. Meta- 

 notal area smooth, furrowed down the middle. Head and thorax closely 

 and strongly punctured. Cheeks thickly covered with long pale golden 

 hair. Pleural spine mederately large, black, pale in the centre. Pygidial 

 area irregularly, transversely reticulated in the middle, roundly nar- 

 rowed at the base and still more narrowed at the apex, the sides curved; 

 epipygial incision fully three times longer than wide, not extending 

 back to the middle. Allied to C. truncatus Cam. 



3056 Cerceris cosmiocephala sp. nov. 



Black, face, clypeus, lower half of inner orbits broadly, mandibles 

 except at the apex, two irregular transverse marks behind the ocelli, 

 a mark dilated backwards above on the upper outer orbits, two lines on 

 the pronotum, two irregular marks on the base of the scutellum, two 

 smaller marks on the sides of the post-scutellum, a broad line on the 

 apex of the first abdominal segment, and the following segments except 

 narrowly at the base, lemon-yellow. Scape of antennae yellow below; 

 the basal joints of antennae entirely and the others below, rufous. 

 Four front tibiae and tarsi almost entirely, their femora broadly below 

 and the hind tibiae below, yellow, the hind tarsi rufous, the black on 

 the hind tibiae being also tinged with rufous. Wings hyaline, strongly 

 tinged with smoky fulvous, the stigma and nervures fulvous. Metanotal 

 area smooth, shining, deeply furrowed down the middle, the sides with 

 a narrow border of stout oblique striae. Male. Length 9 mm. San Marcos, 

 Nicaragua. 



