314 HYMENOPTERA. 



It agrees also with S. respublicana in the mandibles being toothed — " Mandibles stout, 

 with a tooth about one third of their length from the tips." The pubescence on the 

 basal segment of the abdomen is golden, not silvery as in S. respublicana. 



i 



v 2. Sphaerophthalma respublicana. (Tab. XIV. %g. 1, ? ; 1 «, head from 



the side.) 



Nigra, capite et thorace aeneo-velutinis ; abdominis segmento 2° ferrugineo bimaculato. $ . 

 Long. 18 millim. 



Hab. Mexico, Cordova, Paso del Macho (Edge). 



Head much wider than the thorax, somewhat convex (rounded) in front, concave 

 behind, slightly narrowed from the eyes ; the hinder angles viewed from above 

 rounded, behind bluntly keeled, the keel ending in a stout, blunt tooth ; the cheeks 

 are prolonged into stout teeth, narrowed and curved at the apex, and nearly 2 millim. 

 in length. The head is black, the vertex covered with dense golden pubescence ; the 

 hair on the front is black ; the clypeus is rounded at the apex, obscure fulvous in 

 colour, and fringed with long fulvous hair; the outer orbits bear a sparse white 

 pubescence and they have shallow punctures ; the front is rugosely punctured. At 

 the base of the mandibles on the lower side there is a long tooth, rounded at the apex. 

 The scape of the antennae is long, narrow, curved at the apex, and covered with white 

 hair ; the third joint is more than twice the length of the fourth and is shorter than 

 the second. The thorax is broadly but shallowly narrowed ; the base is rounded and 

 is a little wider than the apex ; at the base are two short blunt tubercles ; the apex 

 has a straight oblique slope. The posterior part of the propleurae is punctured ; in 

 the middle of the mesopleurae at the top is a comparatively deep, smooth incision; the 

 extreme apex of the metapleurae is stoutly striolated ; the marginal teeth are minute. 

 The thorax is black, the mesonotum with a broad band of golden pubescence dilated 

 in the middle on either side. The basal abdominal segment is thickly covered with 

 white pubescence. On the second segment are two large roundish orange marks ; its 

 sides and the apices of the other segments are broadly margined with pale fulvous 

 pubescence; the pygidium is densely covered with a dense golden pubescence. The 

 basal ventral segment is bluntly keeled throughout ; the punctuation on the second 

 segment is coarse ; the other ventral segments are finely punctured and sparsely clothed 

 with long white hair. The hair on the coxae, femora, and tibiae is black, that on the 

 tarsi fulvous ; the tibial spines are long, stout, and black. 



^ 3. Sphaerophthalma ravula. (Tab. XIV. fig. 5, $ .) 



Nigra, capite et thorace aureo-velutinis ; abdominis segmento 2° late ferrugineo, basi maculis tribus nigris 



notata. $'. 

 Long. 17-18 millim. 



Hab. Mexico, Amula and Acapulco in Guerrero (H. H. Smith). 



