MUTILLA. 295 



than the second ; the first transverse cubital nervure is oblique and slightly curved, 

 the second elbowed bluntly in the middle, the third sharply angled in the middle ; 

 the first recurrent nervure is received shortly beyond the middle, the second in the 

 apical third of the cellule ; the third cubital cellule at the top is about as long as the 

 space limited by the third transverse cubital and the second recurrent nervures ; the 

 transverse median nervure is almost interstitial. 



This species is perhaps nearest allied to M. chroma, and, like it, has the raised area 

 on the pygidium smooth and glabrous. In M. chroma, however, there is no stout keel 

 on the pygidium dividing the apex into two portions, the top, too, being keeled ; while 

 the apex (the bottom flattened part) projects considerably and is incised in the middle 

 (which is not the case in M. sinaloa). In M. chroma, again, the teeth on the hypo- 

 pygium are much longer, and might, indeed, be called keels ; the tegulse are densely 

 covered with silvery pubescence ; and the two recurrent nervures are received in the 

 middle of the cellules. 



J. 



** Abdomen black. (Species 39.) 

 39. Mutilla nana. 



Mutilla nana, Smith, Descr. of New Species of Hymen, p. 226 1 ; Blake, Trans. Am. Ent. Soc. 

 xiii. p. 205 2 . 



Hab. Mexico, Orizaba x . 



This is a true Mutilla, for the eyes are described as " ovate " ; but the form of the 

 abdomen is not mentioned, so it is uncertain as to which division it belongs. 



ii. Fore wings with two cubital cellules. (Species 40.) 



J 40. Mutilla terminata. 



Mutilla terminata, Smith, Descr. of New Species of Hymen, p. 225 * ; Blake, Trans. Am. Ent. Soc. 

 xiii. p. 205 \ 



Hab. Mexico, Oaxaca 1 . 



The form of the eyes is stated, but not that of the abdomen. 



B. The basal segment of the abdomen not gradually dilated to the apex, but 

 forming a distinct 'petiole. (Species 41-62.) 



1. Females (the males known or not). (Species 41-51.) 

 The following two species have black bodies ; the heads sharply narrowed behind 

 the eyes ; the thorax elongated, narrow ; the median segment with a rather steep 

 slope ; and the mesonotum tuberculated. 



