120 HYMENOPTEEA. 



length of the second and third antennal joints united, and from each other by the length 

 of the fourth. Middle of the clypeus projecting gradually, and becoming narrowed to 

 the apex, broader than long ; the apex with three minute, blunt, indistinct teeth. The 

 entire head (including the clypeus) coarsely and strongly punctured ; the cheeks slightly 

 and the sides of the clypeus densely covered with fulvous-silvery pubescence. Mesonotum 

 coarsely longitudinally punctured ; the pleurae and median segment with larger, rounder, 

 deeper, and more clearly separated punctures, the longitudinal furrow in the mesopleurse 

 distinct ; the heart-shaped area finely transversely striated, widely furrowed down the 

 centre. Abdomen covered almost uniformly with large punctures. Pygidial area elon- 

 gated, hardly narrowed at the base, but becoming gradually narrowed to the apex ; the 

 surface opaque, apparently alutaceous ; the lateral hair-fringe black. The incision in the 

 hypopygium wide, but longer than broad, reaching to the middle. Antennae subclavate, 

 the third joint about one half longer than the fourth. Tibiae and tarsi covered with a 

 silvery pubescence ; the tibial spines cream-coloured. Wings smoky, much darker in 

 the fore half ; the stigma dark fuscous; cubitus with the nervures curved; the recur- 

 rent nervure received shortly before the middle. The antennae are rufous beneath, the 

 apical joint being also rufous above. There is a yellow line along the middle of the 

 eyes on the inner side ; a complete line on the pronotum, sometimes a mark on the 

 pleurae beneath the teguhe, the scutellum, metanotum, a mark on either side of the heart- 

 shaped area, a broad band on the petiole, a band on the second segment (much wider 

 at the sides), a narrow line on the fourth segment, a still narrower one on the fifth, and 

 a line on the second ventral segment, yellow ; the four anterior knees and tibiae in front 

 and the tarsi are rufo-testaceous. 



A near ally of C. montivaga; the middle of the clypeus becomes very distinctly 

 narrowed towards the apex, the raised part, too, being longer, and not covered densely 

 with silvery pubescence ; the wings are much darker coloured ; the heart-shaped area 

 of the median segment is striated ; the pygidial area is longer and narrower ; and the 

 metanotum and median segment are marked with yellow. 



22. Cerceris SUbpetiolata. (Tab. VII. figg. 18, clypeus, $; 18 a, pygidium ; 

 18 b, hypopygium). 

 Cerceris subpetiolata, Saussure, Reise d. Novara, Hymen, p. 95 ( £ ? ) \ 



Hab. Mexico, Tampico l , Eastern Cordillera 1 i Atoyac in Vera Gruz (H. H. Smith) ; 

 Guatemala, San Geronimo (Champion). 



I give a renewed description : — 



Clypei pars media fere libera, margine apicali bidentato ; oculorum margines paralleli ; area cordiformis fere 

 aciculata, sparse punctata ; nigra, apice segmento secundo, basique tarsorum flavis ; alis fusco-hyalinis, 

 antice fortiter fumatis. 



Jjong. 11 millim. 



Eyes parallel. Ocelli not forming a triangle, separated from the eyes by nearly the 



