INVESTIGATIONS ON THE MUTILLID WASPS 269 



2 clothed with sparse appressed, silvery pubescence and scattered, 

 erect, pale hairs; tergites 3-5 densely, confiuently punctate, clothed 

 with sparse, appressed, silvery pubescence, and scattered, erect, pale 

 hairs, the apical fringes silvery at the middle and lateral margins, 

 black subdorsally, except 5 in which the black apical fringe extends 

 to the lateral margins of the tergite; pygidial segment with dense, 

 long black pubescence at the base and sides; pygidium granulate; 

 first sternite elevated anteriorly along the median longitudinal line 

 to form a carina, the latter not toothed ; lateral areas of the sternite 

 indistinctly punctate, clothed with scattered, erect, pale hairs; second 

 sternite with large, distinct, elongate punctures throughout except 

 the apical margin somewhat depressed and confiuently punctate, 

 with scattered, erect, pale hairs throughout, and a thin apical fringe 

 of silvery pubescence; apical margins of sternite 3-5 confiuently 

 punctate ; sternites 3 and 4 with a thin apical fringe of silvery pubes- 

 cence; sternite 5 with an apical fringe of black pubescence; ultimate 

 sternite confiuently punctured at the sides and apex, the punctured 

 area clothed with long, dark hairs. 



Legs ferruginous, the tibial spines darker than the tibia; calcaria 

 pale ; apices of middle and hind femora squarely truncate, the apices 

 expanded eacM side, the expanded areas sulcate. 



HaIotype.—Fem2ile, Cat. No. 40748, U.S.N.M., Dawson Camp, Salt 

 Kiver, Arizona, September 5 (C. H. T, Townsend). 



Paratypes- — Female, Baboquivaria INIountains, Arizona (F. H. 

 Snow) ; female, Sabino Basin, St. Catalina Mountains, Arizona, 

 July 8-20, 1916; in collections of UniA^ersity of Kansas and American 

 Museum of Natural History. 



This species is very similar in appearance to chri/socoma but differs 

 in having the carina of the postero-lateral angles of the head some- 

 what crenulate, and in lacking the broad band of black pubescence at 

 the apex of the second abdominal tergite. In this species the apex 

 at the middle is clothed with silvery pubescence, and there is a narrow 

 subapical band of black pubescence which unites subdorsally with the 

 black apical fringes. 



117. DASYMUTILLA ERRABUNDA, new species 



Male. — Ferruginous; the head, and dorsum of the thorax dark, 

 the remainder of the body bright ferruginous ; head, thorax, legs, and 

 abdomen except apical margins of segments 5 and 6, all clothed with 

 mostly erect, silvery pubescence ; length, 9.5 mm. 



Head subquadrate, dark mahogany red, clothed throughout with 

 moderately dense, erect and semirecumbent, silvery pubescence ; man- 

 dibles long, acute at the apex, unidentate within near the apex ; cly- 

 peus very prominently bidentate medially on the cephalic margin, 



