340 . HYMENOPTEEA. 



the antennae shining, sparsely haired, much brighter in tint than the flagellum ; the 

 third joint is not quite the length of the fourth. The thorax elongate, rounded in 

 front, narrowed behind ; the middle with a shallow contraction ; in front of the con- 

 traction are two stout teeth, the basal one being the shorter and thicker of the two. 

 The median segment with a gradually rounded slope, and with a distinct keel down its 

 middle; on the edges are four large, thick, slightly curved teeth ; it bears some long 

 hairs. The upper part of the thorax sculptured like the head, and bearing a short 

 white pubescence and some white hairs. The posterior part of the propleurae rather 

 coarsely punctured, and with two tubercles at the top ; the meso- and metapleurae 

 shining, impunctate. The basal segment of the abdomen finely punctured and covered 

 with long white hair. The second segment more strongly punctured, and bearing 

 some blackish hairs ; at the base is a short longitudinal line of pale golden hair, and 

 there is a broader transverse band at the apex, the apex itself being black. The third 

 to the fifth segments are blackish, covered with golden pubescence. The pygidium is 

 shining, impunctate, covered with long hairs. The keel on the basal ventral segment 

 projects as a curved tooth ; the second segment with large, distinctly separated punc- 

 tures; the other ventral segments minutely punctured. The legs are covered with 

 white hair. 



A second specimen from the same locality wants the keel on the median segment ; 

 it is apparently a variety of the same species. 



v 46. Sphaerophthalma cephalica. (Tab. XIV. fig. 22, $ .) 



Long, fere 8 millitu. $ . 



Hah. Guatemala, Las Mercedes 3000 feet (Champion). 



Head a little wider than the thorax, slightly convex in front and behind ; the eyes 

 projecting beyond the back part of the head, which does not equal the eyes in length 

 and is not narrowed behind ; the hinder edges rounded, coarsely punctured, covered 

 with glistening white hair; the oral and antennal region narrowed, the front projecting 

 widely over them ; the apex of the clypeus transverse, ferruginous ; the hinder part of 

 the vertex, the occiput, the apices of the mandibles, and the outer orbits for the greater 

 part, black. The scape of the antennas ferruginous, sparsely covered with white hair ; 

 the flagellum brownish beneath, blackish above ; the third joint twice the length of 

 the fourth. The thorax above coarsely punctured, sparsely covered with short silvery 

 hair ; the base transverse, the apex with a sharp slope, rounded at the top ; the basal 

 half at the sides is straight, then there is a small rounded curve, toothed at the base 

 and apex, followed by a wider incurvation, the basal part of which is tuberculate ; 

 there is a black somewhat rounded mark at the base in the centre, and there is a 

 longer black mark at the apex, which becomes gradually widened from the base. The 

 basal triangular part of the propleurae is punctured ; the rest, and also the meso- and 



