278 BULLETIN 143, UISTITED STATES NATIONAL MUSEUM 



angles of the head not equal to one-third the greatest diameter of the 

 eyes ; thorax longer than broad, subhexagonal ; scutellar scale promi- 

 nent; pygidimn longitudinally rugose. Males unknown; may be 

 represented by the following group. 



124. DASYMUTILLA ARENIVAGA, new species 



Female. — Black, the vertex, thorax above, and second abdominal 

 tergite, except the apical fringe, with long, dense, erect, yellow 

 pubescence ; eyes unusually large. Length, 12 mm. 



Head very dark mahogany red; mandibles acute at the apex, uni- 

 dentate within about one-third their length from the apex; clypeus 

 feebly bidentate medially on the apical margin; clypeal fringe of 

 long, black pubescence ; scape punctured, sparsely clothed with coarse 

 black hairs; first segment of flagellum twice its own width at the 

 apex; antennal scrobes strongly carinate above; front shallowly and 

 confluently foveate, clothed with erect and recumbent black pubes- 

 cence; the vertex with shallow, more or less confluent punctures, 

 clothed with erect and recumbent yellow pubescence; genae with 

 shallow, separated punctures, not nearly as coarsely sculptured as the 

 front, sparsely clothed with black pubescence; eyes very large, the 

 distance between the eye margins and the postero-lateral angles of 

 the head not greater than one-third the greatest diameter of the eyes ; 

 relative widths of head and thorax, 8-9. 



Thorax black; the dorsum closely foveate, clothed with long, 

 dense, erect and recumbent yellow pubescence ; propleura with large, 

 close punctures anteriorly, small punctures posteriorly, sparsely 

 clothed with black pubescence; anterior half of mesopleura indis- 

 tinctly punctured, sparsely clothed with long, black pubescence; 

 posterior half of mesopleura confluently foveate anteriorly, indis- 

 tinctly punctate posteriorly, clothed with long, black pubescence; 

 dorsal half of metapleura impunctate, the ventral half irregularly 

 punctate, clothed with long, sparse, black pubescence; anterior half 

 of sides of propodeum with scattered punctures, the posterior half 

 closely foveate, sparsely clothed with black pubescence, and a little 

 scattered yellow pubescence dorsally; posterior face of propodeum 

 closely and deeply foveate, except the ventral median area indis- 

 tinctly punctate; the dorsal half of the posterior face of the pro- 

 podeum, and the dorsum of the propodeum with long, dense, erect, 

 yellow pubescence; scutellar scale very prominent. 



Abdomen black; the first segment short, subsessile; disk of first 

 tergite impunctate, the sides and posterior margin closely, shallowly 

 punctate, sparsely clothed with long, erect, black pubescence ; second 

 tergite closely foveate at the base and sides, and with large, usually 

 separated punctures on the disk, clothed with long, dense, erect and 



