INVESTIGATIONS ON THE MUTZLLID WASPS _ 207 



scattered, long, pale, erect hairs ; dorsum of thorax with very coarse, 

 large, contiguous punctures; the posterior face and dorsum of the 

 propodeum with coarse, contiguous, f oveate punctures ; scutellar scale 

 broad and distinct; propleura with large, close, indistinct punctures, 

 sparsely clothed with silvery pubescence ; anterior half of mesopleura 

 finely punctate, the posterior half coarsely, closely punctate, sparsely 

 clothed with silvery pubescence, the latter somewhat more dense on 

 the posterior half than on the anterior half; metapleura coarsely 

 punctured at the ventral margin, finely, indistinctly punctured else- 

 where, moderately clothed with silvery pubescence; sides of pro- 

 podeum with large, indistinct punctures and clothed with sparse, 

 silvery pubescence. 



Abdomen pale ferruginous; first abdominal tergite short, nodose, 

 closely foveate at the apical margin and submargin, clothed with 

 scattered, erect, pale hairs, a thin apical fringe of silvery pubescence, 

 and a conspicuous, median spot of dense, silvery pubescence at the 

 apex; apical half of second abdominal tergite with a pair of large, 

 round, coalescent, pale yellow spots; this area with large, separated 

 punctures and sparse, appressed and erect, pale hairs; basal area of 

 disk anterior to the pale yellow spots with dense, moderate punc- 

 tures and sparse, black appressed pubescence, together with scattered, 

 erect hairs; apical fringe of second tergite black, except lateral ex- 

 tremes yellow, and submarginal area of the apex of second tergite 

 clothed with sparse, black, appressed pubescence; lateral areas of 

 second tergite with close, large, elongate punctures; third tergite with 

 moderate, distinct punctures, clothed with black pubescence, except 

 extreme lateral margins and broad median area with silvery pubes- 

 cence ; tergites 4 and 5 with small, indistinct punctures, clothed with 

 sparse, silvery pubescence; marginal areas of pygidial segment 

 clothed with silvery pubescence; pygidium longitudinally striate; 

 carina of first sternite feebly bidentate, with scattered, erect, pale 

 hairs; second sternite with large, distinct punctures throughout, ex- 

 cept punctures of apical margin close and confluent; clothed with 

 scattered, erect, pale hairs, and a thin apical fringe of silvery pubes- 

 cence; apical margins of sternites 3-5 closely, confluently punctate, 

 each with a thin apical fringe of silvery pubescence ; ultimate sternite 

 punctate at the apex and the same area clothed with black pubescence. 



Legs pale ferruginous, very sparsely clothed with silvery pubes- 

 cence ; calcaria and tibial spines dark. 



Holotype. — Female, Phoenix, Ariz., August 3, 1917, in collection of 

 Cornell University (No. 764.1). 



Paratype. — Female, Phoenix, Ariz., August 3, 1917, in collection 

 of J. Bequaert. 



