292 HTMENOPTEEA. 



scutellum slightly convex, rugosely punctured, covered with long pale hair. The 

 median segment with a gradually rounded slope to the apex, reticulated ; the base 

 with a dense band of silvery pubescence, the rest with pale fuscous hair. The pro- 

 pleurae deeply excavated, the base and apex with stout striae ; the mesopleurae with 

 scattered punctures, and covered with whitish hair; the apex of the metapleurae 

 reticulated. The tegulse are large, covered with silvery pubescence, but more densely 

 at the apex, which is piceous. The basal segment of the abdomen is entirely ferrugi- 

 nous, except the stout teeth, which are black ; it has scattered punctures and a sparse 

 covering of white hair. The second and following segments have scattered punctures, 

 and at the apex are fringed with fiery-ferruginous hair. The pygidium is more strongly 

 punctured than the other segments ; there is an indistinct broad keel down the middle, 

 terminating in a distinct transverse keel, from which the apex sinks almost perpendicu- 

 larly, this part being also keeled, the extreme apex projecting ; at the apex it is covered 

 with long white hair. The middle of the basal ventral segment is black ; the base of 

 the keel is triangular, the apex projecting upwards. The second segment is almost 

 impunctate, except a depressed transverse line of large punctures at the apex. The 

 other segments are finely punctured at the apex, and fringed with silvery hair. The 

 hypopygium is almost transversely margined at the apex, and is without any peculiarity. 

 The wings are fuscous, but not deeply. The radial cellule is wide ; the basal and apical 

 abscissas are both curved, the latter a little shorter than the former. The first cubital 

 cellule is longer than the second, which at the top is not much longer than the space 

 bounded by the second transverse cubital and the first recurrent nervures. The third 

 transverse cubital nervure is sharply angled in the middle ; at the top the third cubital 

 is about the length of the space bounded by the second recurrent and the third trans- 

 verse cubital nervures. The basal nervure is subinterstitial. 



^ 37. Mutilla prema. 



Long. 12 millim. S • 



Hab. Mexico, Acaguizotla in Guerrero 3500 feet (H. H. Smith). 



Head narrower than the thorax, coarsely punctured, moderately well developed 

 behind the eyes and roundly narrowed there ; the vertex covered with long fuscous 

 hair, the other parts with dense silvery pubescence, which has a faint fulvous 

 tinge ; the part above the clypeus oblique ; the clypeus slightly incurved at the 

 apex, the sides oblique; the mandibles towards the apex rufous, the base punc- 

 tured and covered with pale fulvous hair. The scape of the antennae densely 

 covered with white hair, the apex oblique ; the base of the second joint also obliquely 

 narrowed ; the third and fourth joints subequal. The pronotum is coarsely punctured 

 and clothed with long silvery hair, the apex with a broad dense band of pale fulvous 

 pubescence; the sides of the apex are oblique; the middle bluntly rounded. The 

 mesonotum shining ; the hair fuscous ; the punctures large, deep, mostly longer than 



