INVESTIGATIONS ON THE MUTILLID WASPS 271 



slightly elongate, distinct punctures, sparsely clothed with erect, 

 silvery pubescence, except the lateral pubescence dark, apical fringe of 

 silvery pubescence ; apical margins of sternites 3-6 densely punctured ; 

 thin apical fringes of sternites 3 and 4 silvery, the fringes of sternites 

 5 and 6 black ; ultimate sternite with strong, distinct punctures. 



Legs dark mahogany red ; sparsely clothed with silvery pubescence ; 

 apices of middle and posterior femora squarely truncate, the caudal 

 surfaces of the truncation sulcate ; calcaria pale. 



Wings light fuliginous; cell 2nd Ri + Rg broadly truncate at the 

 apex ; cell E.4 practically obsolete ; vein M3^.4 received by cell R5 about 

 one-third the distance between the base and the apex ; veins r-m and 

 R5 distinctly separated on vein r. 



Holotype. — Male, Tucson, Arizona (F. H. Snow), in collection of 

 University of Kansas. 



This species is closely related to ohscura but may be easily dis- 

 tinguished by the color of the integument and of the pubescence and 

 the pale calcaria. The genitalia are like those of obscura and are not 

 figured. This may be the male of heliophila Cockerell. 



118. DASYMUTILLA SOPHRONA, new species 



Male. — Head and thorax black; abdomen ferruginous; head and 

 pronotum clothed with somewhat dense silvery pubescence, the meso- 

 thorax and scutellum with darker pubescence ; abdomen clothed with 

 pale yellowish pubescence throughout; length 13.5 mm. 



Head subquadrate, black, clothed throughout with somewhat dense, 

 recumbent, silvery pubescence and scattered, erect, darker hairs; 

 mandibles long, the basal two-thirds ferruginous, apical third black, 

 acute at the apex, toothed within near the apex; clj'peus very promi- 

 nently bidentate medially on the cephalic margin, the disk densely 

 punctate; scape with only one distinct carina beneath, above with 

 strong, distinct punctures; first segment of flagellum two-fifths 

 longer than it is wide at the apex, distinctly shorter than the second 

 segment; antennal tubercles distinctly separated; antennal scrobes 

 carinate above, the carina most prominent midway between the an- 

 tennal tubercles and the margins of the eyes; front rugoso-punctate ; 

 vertex and genae with large, somewhat confluent punctures, not as 

 coarsely sculptured as the front ; distance between the posterior mar- 

 gins of the eyes and the postero-lateral angles of the head less than 

 the greatest diameter of the eyes; relative widths of head and 

 thorax, 7-8. 



Thorax black; the pronotum with somewhat dense, recumbent, 

 silvery pubescence, and with scattered, erect, pale hairs, the re- 

 mainder of the thorax with sparse, erect, dark hairs, very sparse on 

 the propodeum ; cephalic surface of pronotum contiguously punctate 

 above; pronotum with large, dense punctures, somewhat confluent; 



