266 HYMENOPTEEA. 



the outer side smooth and glabrous, the inner side bearing long white hair; the second 

 and third joints dull rufous, the second bearing long fulvous hairs, the other joints 

 with a microscopic down; the third joint distinctly longer than the fourth. The 

 thorax elongate-quadrate, the sides slightly narrowed, rough above, coarsely punctured, 

 except the mesopleurae, which are smooth and shining ; the apex of the pronotum 

 rounded ; the median segment at the apex almost transverse, and with a steep semi- 

 oblique slope. The thorax above bears long black hair; the hair on the median 

 segment is long and white. The abdomen is wider than the thorax. The basal segment 

 is shining, but bears large, widely separated, shallow punctures ; the apex with a band 

 of pale fulvous hair. The second segment is coarsely shagreened, without distinct 

 punctures ; the sides and a band on the apex are pale fulvous ; and at the base are two 

 elongated lines proceeding from the extreme base to near the middle. On each of 

 the third, fourth, and fifth segments are two white marks, which form an almost 

 continuous band. The pygidium is rough and laterally bears a thick mass of long 

 dark fulvous hair. The second ventral segment is somewhat strongly punctured, and 

 bears dark fulvous hair ; the other segments are less strongly and uniformly punctured, 

 and are fringed with rather long fulvous hair. The legs are red, with the knees black, 

 and are clothed with white hair ; the tibial spines are black, the calcaria pale. 



This species agrees very closely in coloration with M. mexicana, except that the 

 scape of the antennae is black ; but otherwise may be readily separated from it by the 

 clypeus not being toothed, the lower part of the cheeks only very indistinctly toothed, 

 the head less developed behind the eyes, the slope of the median segment much steeper 

 (it being not so broadly and gradually rounded), and the basal maculae on the second 

 abdominal segment longer and narrower, the apical band also narrower. 



v ' 6. Mutilla Cyllene. (Tab. XIII. figg. 4, <s ; 5, 6 organ ; 6, ? .) 

 Ferruginea ; eapite subtus nigro ; geniculis coxisque nigris ; abdomine nigro, subtus rufo ; antennis nigris 



abdomine ( $ S ) rufo ; alis fuscis. 

 Long. 15 millim. 



Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith). 



Head rather strongly punctured ; the vertex with long fuscous hair, the rest densely 

 covered with long white hair ; the apex of the clypeus transverse, its sides oblique ; 

 below the eyes the cheeks terminate on each side in a pair of short, stout, blunt teeth ; 

 the mandibles are punctured on the basal half. The eyes are large ; the head is only 

 slightly developed behind them, and not much narrowed. The antennae have the scape 

 sparsely pilose ; the third and fourth joints are equal in length. The pronotum is 

 coarsely punctured ; the sides with silvery pubescence, the base with long pale hair, the 

 apex with a broad dense band of long white pubescence. The mesonotum is shining, 

 very coarsely and irregularly punctured ; the hair black ; the scutellum very slightly 

 convex, coarsely punctured, covered with long blackish hair, the apex with white hair. 



