304 HYMENOPTEEA. 



The next species is perhaps best placed here ; we have not received a specimen 

 ofit:— 



^ 51. Mutilla yucatana. 



Mutilla yucatana, Blake, Trans. Am. Ent. Soc. iii. p. 203 *, and xiii. p. 231 2 . 

 Hab. Mexico (Sumichrast 12 ). 



This species has the head fuscous, the abdomen with the disc dark ferruginous and 

 the sides fuscous. 



2. Males, of which the females are unknown. (Species 52-62.) 



* The median segment laterally terminating in long stout spines ; the apex of the 

 scutellum spined at the side. (Species 52.) 



52. Mutilla Odontophora. (Tab. XIII. figg. 30, 6; 31, c? organ.) 



Long. 14 millim. S • 



Hab. Panama, Bugaba 800 to 1500 feet {Champion). 



Head very coarsely and strongly punctured, shining, the vertex with some fuscous hairs ; 

 a dense tuft of silvery-white hair over the base of the antennae ; the clypeus bearing 

 long silvery hair ; down from the antennae run two stout keels, which continue nearly 

 parallel to the middle and then become widely divergent ; the cheeks slightly incised 

 at the apex laterally ; the mandibles piceous before the apex. The eyes are large and 

 reach quite close to the top of the head. The scape of the antennae punctured, grooved 

 on the inner side, sparsely pilose ; the flagellum with a microscopic fuscous pubescence ; 

 the third joint distinctly longer than the fourth. The thorax not much wider in the 

 middle than the head, very coarsely and strongly punctured ; the punctures on the 

 mesonotum running into reticulations, some of them being very long and wide. The 

 pleurae very coarsely punctured. The pronotum with the sides wide, slightly oblique, 

 at the base very slightly projecting. The scutellum obliquely projecting, bearing some 

 large and deep punctures, and with a smooth channel down the centre; the apex 

 in the middle slightly projecting, impunctate and raised ; the sides projecting into 

 stout, somewhat triangular teeth. The median segment with a gradually rounded 

 slope to the apex, densely covered with silvery pubescence ; at the base in the middle 

 is a V-shaped area, from which runs a keel to the apex of the segment ; the sides are 

 smooth, and deeply and widely grooved to a little beyond the middle above, projecting 

 into large stout teeth, which reach to the basal third of the petiole. The mesopleurae 

 bear a sparse whitish pubescence, and project in the middle into a large, stout, some- 

 what triangular tooth. The petiole is longer than broad, the base depressed and 

 projecting into blunt teeth ; densely covered with silvery-white pubescence. The 

 second and following segments are smooth and shining, very minutely punctured, the 



