INVESTIGATIONS ON THE MUTELLID WASPS 161 



Head ferruginous; front and vertex very sparsely clothed with 

 recumbent, golden yellow pubescence, and a few scattered, erect hairs; 

 the genae with sparse, erect, silvery gray pubescence ; mandibles acute 

 at the apex, not dentate within; clypeus with a median, transverse, 

 very sharp, sinuate carina, the cephalic half of the clypeus glabrous, 

 impunctate, the caudal half densely, finely, confluently punctate; 

 scape finely punctate beneath, coarsely, contiguously punctate above ; 

 first segment of flagellum slightly less than twice as long as it is 

 broad at the apex, shorter than the length of segments 2 and 3 united ; 

 antennal scrobes not carinate above ; front with dense, deep, somewhat 

 confluent punctures; vertex and genae with somewhat similar punc- 

 tures, but the latter not so deep and coarse as on the front ; postero- 

 lateral angles of head with an oblique, elongate, subrectangular, 

 glabrous tubercle, the tubercles connected caudally by a carina on the 

 posterior margin of the vertex, posterior margin of head slightly 

 convex ; relative widths of head and thorax, 5.75-6. 



Thorax ferruginous, clothed above with sparse, recumbent, golden 

 yellow pubescence, and a few scattered, erect hairs; sides of thorax 

 with very sparse, silvery gray pubescence; dorsum of thorax with 

 very coarse, dense, deep, somewhat confluent punctures; scutellar 

 scale present; a broken, somewhat indistinct, sinuate carina imme- 

 diately anterior to the scutellar scale; propleura with large, coarse 

 punctures at the margins, intermixed with fine punctures on the disk ; 

 anterior two-thirds of mesopleura finely, closely punctured, the 

 posterior third with large, close punctures; metapleura glabrous, 

 with sparse, indistinct fine punctures, interspersed ventrally with 

 scattered, large punctures; sides of propodeum with large, sha,llow, 

 almost contiguous punctures; dorsal half of posterior face, and 

 dorsum of propodeum very coarsely, deeply, confluently punctate; 

 ventral half of posterior face of propodeum finely punctate, inter- 

 spersed with large, scattered punctures. 



Abdomen ferruginous; first segment short, subsessile with the 

 second ; first tergite finely punctate, interspersed with scattered, large 

 punctures, clothed with sparse, erect, silvery gray pubescence, the 

 apical fringe black; second tergite with a pair of small, basal and a 

 pair of large apical, pale ferruginous spots, the spots with sparse, 

 recumbent, golden yellow pubescence, remainder of tergite with 

 sparse, recumbent, black pubescence, except the apical fringe silvery 

 gray; second tergite with large, dense, deep, somewhat confluent 

 punctures, the puncturation denser and coarser on the disk than at 

 the lateral and basal margins; third tergite with large, dense, some- 

 what confluent punctures, clothed with sparse, recumbent, black 

 pubescence, except the apical fringe silvery gray; tergites 4 and 5 

 densely punctate, clothed with sparse, recumbent, silvery gray 



