126 HYMENOPTEKA. 



Eyes slightly diverging. Ocelli separated from the eyes by a little more than the 

 length of the third antennal joint, and by a slightly less distance from each other. 

 Middle of the clypeus porrect, reaching below the labrum, longer than broad, convex, 

 the apex truncate, rounded at the edges. Antennal tubercle reaching to the clypeus, 

 acutely edged. Head coarsely rugose, the face and clypeus with scattered punctures. 

 Third antennal joint one half longer than the fourth. Cheeks bearing silvery-fulvous 

 pubescence. Thorax short, not much more than twice the length of the head ; coarsely 

 punctured ; prothorax large, broad. Median segment with a rather steep rounded slope ; 

 the heart-shaped area acutely triangular, opaque, granular, obliquely longitudinally 

 striolated. Punctuation of the median segment very coarsely rugose. The oblique 

 furrow on the mesopleura indistinct. Petiole broader than long ; punctured strongly. 

 Punctuation of the abdominal segments moderate, and becoming weaker towards the 

 apex. Pygidial area coarsely rugose, of nearly equal width throughout ; the sides with 

 large separated punctures ; the lateral hair-fringe short, pale testaceous. The incision 

 in the hypopygium wide, longer than broad, rounded at the base. The inner orbits 

 of the eyes broadly, the clypeus (except round the edges), the metanotum, a narrowish 

 band on the apex of the second and third segments, the greater part of the fourth 

 and fifth segments and the sides of the apical one, and the apical three segments broadly 

 at the sides beneath, yellow. Legs fulvous, the coxae, trochanters, and the greater part 

 of the femora black. 



v 32. Cerceris erythropoda. (Tab. VIII. figg. 7, head ; 7 a, clypeus ; 7 b, pygi- 



dium ; 7 c, hypopygium.) 



Nigra, facie, thorace abdomineque flavo-maculatis ; pedibus fulvo-rufis, basi nigris ; alis fere hyalinis, apice 



fumatis, stigmate ocbraceo ; clypeo elevato, libero, apice truncato. $ . 

 Long. 10*5 millim. 



Hab. Mexico, Cordova (coll. Saussure). 



Eyes parallel, distinctly margined behind ; hinder ocelli separated from the eyes by 

 fully the length of the third antennal joint and from each other by a slightly less distance. 

 Punctuation of the head moderately coarse. Clypeus obliquely porrect ; longer than 

 broad, narrowed slightly towards the apex, which is almost transverse. Thorax with 

 the punctures wide apart ; those on the median segment somewhat larger. The heart- 

 shaped area of the median segment longitudinally striated laterally ; furrowed down the 

 centre, which is aciculate. Petiole broader than long, bearing scattered punctures ; 

 the second and third segments punctured like the mesonotum, but with the punctures 

 smaller; the punctures on the other segments smaller and closer. Pygidial area 

 straight, slightly narrowed towards the apex, the surface irregularly reticulated ; the 

 lateral hair-fringe sparse. The incision in the hypopygium longer than broad, rounded 

 at the base, reaching near to the middle. Legs but slightly haired ; the hinder tibiae 

 coarsely serrate. Cubitus oblique, angled broadly beneath; the recurrent nervure 



