INVESTIGATIONS ON THE MUTILLID WASPS 267 



ond tergite glabrous, impunctate, the remainder with deep, elongate 

 punctures, large and separated laterally, large and contiguous on the 

 disk, small and confluent on the apical fifth which is slightly de- 

 pressed ; second tergite clothed with sparse, appressed, silvery pubes- 

 cence and scattered, erect hairs, except the apical fifth and a subbasal 

 median transverse spot connected by a narrow longitudinal line, all 

 with black pubescence ; the lateral margins and extreme lateral por- 

 tions of apical fifth with dense silvery pubescence ; tergites 3-5 coarsely, 

 confluently punctate; 3 and 4 clothed entirely with appressed, silvery 

 pubescence and erect, pale hairs, except for lateral subdorsal spots 

 of black in the apical fringe ; tergite 5 clothed with black pubescence 

 except for a large, median area of appressed, silvery pubescence; 

 pygidium granular, the pygidial tergite clothed laterally and basally 

 with long, black pubescence; first sternite elevated anteriorly along 

 the median longitudinal line to form a carina, the carina not toothed ; 

 lateral areas of first sternite with confluent punctures and scattered, 

 erect, pale hairs; second sternite with large, elongate, distinct punc- 

 tures throughout, except the subapical margin slightly depressed 

 and confluently punctate; second sternite with scattered pale hairs 

 and a thin apical fringe of silvery pubescence ; subapical margins of 

 sternites 3-5 confluently punctate ; sternites 3 and 4 with thin apical 

 fringes of silvery pubescence, 5 with an apical fringe of dark pubes- 

 cence ; ultimate sternite confluently punctured, sparsely clothed with 

 dark pubescence. 



Legs ferruginous, the tibial spines darker than the tibia; cal- 

 caria pale ferruginous; apices of middle and hind femora squarely 

 truncate, the apices expanded each side, the expanded areas sulcate. 



Holotype.—F&m2i\Q^ Kits Peak Rincon, Baboquivaria Mountains, 

 Arizona, August 1-4, 1916; in collection of American Museum of 

 Natural History. 



Paratype.—FQrQi2i\Q, Tucson, Arizona, July 26, 1921; in collection 

 of University of Minnesota. 



A very striking species, readily recognizable by the sharp carina 

 on the posterolateral angles of the head, and the broad band of 

 black pubescence at the apex of the second abdominal tergite. 



116. DASYMUTILLA DILUCIDA, new species 



/^emaZe.— Ferruginous ; head wider than the thorax, densely 

 clothed with appressed, golden pubescence, the postero-lateral angles 

 carinate; thorax pyriform, sparsely pubescent; second abdominal 

 tergite silvery pubescent apically at the middle; pygidium granulate; 

 length, 9 mm. 



Head ferruginous; mandibles long, bluntly toothed within just 

 beyond the middle; clypeus divided by a transverse sinuate carina, 

 that portion of the clypeus anterior to the carina glabrous, impunc- 



