132 S. A. ROHWER. 



black or piceous. Head, thorax and dorsal segment with long black 

 hairs, pleuras with some white hairs intermixed; legs and abdomen 

 except the second dorsal segment with long sparse white hair; apical 

 margins of the abdominal segments 2 and 3 with a dense fringe of 

 short white hair. 



Habitat. — One female specimen collected near the top of 

 Flagstaff Hill, Boulder, Colorado, August 1, 190S, alt. about 

 6,000 feet (T. D. A. Cockerel!) . 



This species belongs to the group anthropkoraz of Fox and 

 runs to sanctcefece Ckll. and Fox (New Mexico), but the 

 antennas are not ferruginous throughout, the legs are darker, 

 the second dorsal segment does not have the punctures evenly 

 separated, and the hair of the head, thorax and second dorsal 

 segment is black, not white. 



Mutilla (Timulla) briaxus Blake. 



Female. — Length 9 mm. Mandibles rather robust, short, with a 

 small tooth within. Antennal fovea rather large, shining, bounded 

 above by a transverse carina. Antenna? robust, tapering beyond the 

 middle; third joint a little more than twice as long as the fourth, 

 broader at the apex. Eyes elongate oval; maler space rather large. 

 Head about the same width as the thorax, closely, rather coarsely 

 punctured, some of the punctures elongate. Thorax elongate, nar- 

 rowed in the middle; posterior face slightly oblique, seen from the 

 side and behind the margin is serrate. Thorax above and the posterior 

 face with coarse, elongate punctures; pleurae smooth, shining, almost 

 impunctate. Legs rather slender, posterior tibias with rather long 

 spines. First abdominal segment broadly sessile with the second; 

 second segment rather small, sometimes elongate, punctures; punc- 

 tures sparser on the venter and in the middle above. Pygidium fairly 

 well defined, irregularly granular. Color ferruginous; eyes flagellum, 

 legs, first and apical margins of dorsal segments three, four and five, 

 black; head, thorax and second dorsal abdominal segment with sparse 

 appressed golden pubescence; entire insect sparsely clothed with long 

 hair, varying from gray on the legs and abdomen, to reddish on the 

 head and tarsi, to black on the pro thorax; apical margins of the second, 

 third and fourth segments with dense white hair. 



Habitat.— Boulder, Colo., May, 1908 (T. D. A. Cockerel!). 



Close to dubitatas Smith, but when compared with, a speci- 

 men from Columbus, Texas, (Wickham), determined by Mr. 

 Melander, the following differences were noted: the mandibles 

 are shorter and more robust ; the femora are more cylindrical ; 

 the pygidium is not striated; the appressed pubescence is not 

 so dense. This is not closely related to montivaga, which has 

 been placed in Timulla Ashm. (Tran. Am. Ent. Soc. xxxii, 



