CERCEEIS. 117 



hinder tibiae marked with black, the tarsi infuscated. Wings almost hyaline; the 

 second transverse cubital nervure obsolete, the cubitus being thus continuous with the 

 third cubital cellule. 



An example, which is apparently the male of this species, has the clypeus flattish, 

 the apex with three blunt, short, indistinct teeth ; the head coloured as in the female ; 

 the scape yellow beneath; the median segment with two marks; the yellow on the 

 petiole broader and interrupted ; the legs yellow, with the femora more or less marked 

 with black at the base or apex. 



14. Cerceris marginata. (Tab. VII. figg. 11, clypeus, $; 11 a, pygidium; 



lib, hypopygium.) 



Olypei media pars elevata, margine apicali triangulari, dentato ; oculorum margines interni paralleli ; area 



cordiformis rugoso-punctata ; nigra, petiolo ex parte sordide flavo ; alis fuscis, antice fumato. $ . 

 Long. 9 millim. 



Hab. Costa Rica, Volcan de Irazu 6000 to 7000 feet (Rogers). 



Eyes slightly converging beneath, not reaching to the top of the head. Ocelli in a 

 triangle, separated from the eyes by nearly the length of the second and third antennal 

 joints united, and from each other by the length of the second. Clypeus broadly 

 carinate in the middle, projecting at the apex, where it ends in a blunt tooth ; looked 

 at from above it appears triangular. Antennal tubercle short, sharp, compressed. The 

 punctuation of the head is coarse and runs into reticulations. The third antennal 

 joint is one third longer than the fourth. Thorax coarsely punctured, the punctures 

 running into reticulations ; the heart-shaped area of the median segment longitudinally 

 striolated ; median segment with an obliquely rounded slope. Petiole longer than 

 broad. Pygidial area rugose, almost rounded at the apex. Apical ventral segment 

 flat, transverse at the apex, coarsely punctured ; the spines long, stout, acute at the 

 apex. The antennal area is rufous beneath ; the inner orbits of the eyes and the sides 

 and apex of the petiole are yellowish-white. 



The affinities of this species are clearly with C. otomia ; but the very different form 

 of the clypeus and hypopygium serves readily to distinguish the two. 



c. Clypeus (?) subconvex, the apex directed inwardly, and forming two 



leaf -like plates. 



^ 15. Cerceris mexicana. (Tab. VII. figg. 12, $> ; 12 «, head ; 12 b, clypeal 



plates.) 



Cerceris mexicana, Saussure, Reise d. Novara, Hymen, p. 101, t. 4. fig. 59 ( $ $ )\ 



Hob. Mexico, Tampico \ Cuautla *, Teapa in Tabasco (H. H. Smith), Temax in 

 North Yucatan (Gaumer). 



