284 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



Closely related and similar to subhyalina. Both have the charac- 

 teristic large eyes and ocelli. Differs from subhyalina in the light 

 fuliginous wings and in the yellow pubescence of the thorax and 

 abdomen. The genitalia are identical with those of subhyalina and 

 are therefore not figured. 



The four following species are known only in the male sex and 

 their relationships are obscure. They do not represent a natural 

 group and are placed here only as a matter of convenience. All four 

 have a median pit densely filled with hairs on the second abdominal 

 sternite. 



128. DASYMUTILLA CHISOS, new species 



Plate 4, fig. 32 



Male. — Head and thorax black; abdomen fulvous from apex of 

 second tergite. Length, 13 mm. 



Head black, clothed with long, erect, and semierect black hairs; 

 mandibles tridentate; clypeus feebly bidentate at the apex medially, 

 very closely punctate on the apical half; scape shining, sparsely 

 punctate and clothed with coarse hair; first segment of flagellum 

 distinctly shorter than the second ; antennal scrobes distinctly carinate 

 above; front coarsely sculptured; the punctures large, deep, and 

 confluent ; vertex not coarsely sculptured, the punctures shallow and 

 separated; genae with small shallow, more or less confluent punc- 

 tures ; relative widths of head and thorax, 6.25-7. 



Thorax black, clothed with long, erect and semierect black hairs; 

 prothorax, mesothorax, scutellum, and metanotum very coarsely 

 sculptured, the punctures very large, deep, and confluent; pronotum 

 shallowly emarginate medially on the cephalic margin, the face 

 of the emargination shining, impunctate, and produced above on 

 each side of the median line forming two short, rounded teeth; 

 propleura punctate throughout ; mesopleura with scattered, small 

 punctures on the anterior third, large, close punctures on the pos- 

 terior two-thirds; metapleura impunctate, shining, except for a few 

 scattered punctures ventrally; sides of propodeum smooth and shin- 

 ing on anterior half, coarsely reticulate on the posterior half; dor- 

 sum and posterior face of the propodeum broadly and deeply 

 reticulate; tegulae smooth, shining, impunctate, except for a few 

 punctures at the extreme basal margin. 



Abdomen black; first segment subnodose, the ventral carina pro- 

 duced anteriorly into a tooth; basal two-thirds of first tergite 

 shining, with a few irregular punctures, apical third closely con- 

 fluently punctate, clothed with long, erect, black hairs; second ter- 

 gite punctate throughout, the punctures on the disk deep, well sep- 

 arated, those at the base and margins close and confluent, clothed 



