308 HYMENOPTERA. 



5 (4). The hypopygium black; the centre of the clypeus raised and grooved, 

 , not thickly covered with hair. 



6 (7). The raised part of the clypeus indistinct, broad, not widened towards 



the apex herberti. 



7 (6) . The raised part of the clypeus distinctly raised, wedge-shaped, widest 



at the apex ♦ . . . . catriona. 



8 (1). The tegulse keeled idiasta. 



56. Mutilla sapiens. 



Mutilla sapiens, Smith, Descr. of New Species of Hymen, p. 225 {$) (1879) \ 

 Eab. Mexico, Orizaba 1 . 



It is obvious that this species is nearly related to the next, M. herberti, but the 

 description is not very complete ; the tegulse are described as testaceous at their tips, 

 and the wings hyaline, faintly clouded at their apical margin. It belongs to this 

 division, for Smith says that' the basal segment of the abdomen forms a short petiole. 



*s] 57. Mutilla herberti. (Tab. XIII. figg. 32, 6 ; 33, rf organ.) 

 Long. 10-11 millim. tf • 



Eab. Mexico, Omilteme 8000 feet, and Chilpancingo 4600 feet, both in Guerrero 

 (H. H. Smith). 



The antennae have the scape densely covered with silvery hair, the flagellum with a 

 darker pubescence ; the third joint a little longer than the fourth. The head appears 

 to be punctured, but the punctuation is hidden by the dense silvery hair which covers 

 it ; the apex of the clypeus is shining, bare. The thorax is wider than the head ; the 

 pleurae and the median segment densely covered with long silvery pubescence ; the hair 

 on the pro- and mesonotum darker, sparser, and shorter. The pronotum is truncated 

 in front ; the sides oblique, rather coarsely punctured. The mesonotum is coarsely 

 rugosely punctured, without furrows ; the scutellum coriaceous. The sculpture of the 

 upper part of the median segment hidden by the hair ; the sides with large deep punc- 

 tures, almost forming reticulations. The posterior upperside of the mesopleuraa is 

 excavated, smooth, shining. The petiole is about twice longer than wide; the base 

 depressed, the apical three fourths densely covered with silvery hair. The second 

 abdominal segment is closely punctured (but not coarsely, like the mesonotum), and is 

 fringed at the apex with silvery hair. The third and fourth segments are finely punc- 

 tured on their basal half, the apical half aciculated; sparsely covered with long white 

 hairs; the apical segments closely punctured; the pygidium covered with long white 

 hair. The ventral surface is closely and rather strongly punctured. The wings are 

 fusco-hyaline throughout, with the nervures deep black. There are three cubital 

 cellules: the first wider at the top than at the bottom; the second irregularly penta- 



