1897.] NATURAL SCIENCES OF PHILADELPHIA. 137 



no pale pubescence forming maculation on second dorsal segment ; 



head without pale glittering pubescence to the extent of that in 



contumax. 



Mutilla (s. lat.) sanctae-fese n. sp. 



9 . — Length about 6J mm., slender, head and thorax ferruginous, 

 abdomen black except the first segment, which is ferruginous ; pubes- 

 cence thin, silvery, not hiding the surface. Head rather small, 

 almost circular seen from in front, subcancellate with large punc- 

 tures, very thinly pubescent, cheeks not keeled ; eyes prominent and 

 shiny, as in Sphcerophthalma, but oval; mandibles black-tipped, 

 and bearing a prominent tubercle on the outer (lower) edge, not far 

 from the base ; antennae furruginous throughout, first joint of flagel- 

 lum about as long as second. Thorax subcancellate, with very thin 

 erect pubescence, not forming any pattern ; seen from above it is 

 little constricted at the sides, and gradually but not greatly narrows 

 caudad, sloping rapidly behind, without any abrupt truncation. The 

 side view of the thorax has the outline of a half-circle. Coxa?, bases 

 of femora, knees and tarsi ferruginous ; femora and tibia? mainly 

 blackish ; tibial spines not tipped with black. Abdomen fusiform, 

 moderately shiny, second segment moderately densely punctured, 

 first segment rapidly broadening to second, its suture with it little 

 depressed. Pubescence of abdomen erect and rather conspicuous, 

 on the hind margins of segments 2 to 5 partly depressed and forming 

 rather thin white bands, on the disc of the second segment shorter 

 and blackish. The large, exposed articulating surfaces of the third 

 and fourth segments are minutely transversely striate, that of the 

 third having a sharply-defined median smooth area, wholly wanting 

 on the fourth. 



Hab.— Santa Fe, New Mexico, August 5, 1895 (Ckll., 4,260). 

 Superficially resembles S. virguncula, but has the abdomen finely 

 punctured and the entire insect is much more slender. M. sanctce-fece 

 is rather an anomalous little species, for while the eyes are shiny and 

 prominent as in Sphcerophthalma, it has the oval shape of Mutilla; 

 the general coloration, also, recalls some of the species of Mutilla. 

 The tubercle on the mandibles is a striking feature. The middle tibia 

 has two spurs. 



Ancistromma chilopsidis n. sp. 



$. — Length about HA mm., anterior wing 7 mm., smooth and 

 shining, entirely bright ferruginous except the head, which is black 

 except the antenna? and region of the mouth. Front shining, with 

 10 



