INVESTIGATIONS ON THE MUTILLID WASPS 235 



margins of sternites 2-5 with a dense fringe of long, yellow hairs 

 with a few long, black hairs intermixed. 



Legs black, densely clothed with very long, black hairs. 



//o7o^y/?e.— Female, Pima County, Arizona, July 26, 1918, in 

 entomological collection of the University of Minnesota. 



Male. — Black, abdomen red; length 18 mm. Head black with 

 sparse, black, erect hairs; manibles tridentate; clypeus bi dentate 

 medially at the apical margin; basal two-thirds of clypeus finely 

 rugose; first segment of flagellum four-fifths the length of the sec- 

 ond; scape bicarinate beneath; antennal scrobes strongly carinate 

 above; front rugoso-punctate ; vertex sparsely, irregularly punctate; 

 relative widths of head and thorax 6-8. 



Tliorax black, clothed with moderately dense, long, black, erect, 

 and semierect black hairs ; pronotum, mesonotum, and scutellum with 

 dense, confluent punctures, appearing rugoso-punctate; dorsum and 

 posterior face of the propodeum coarsely reticulate; basal third of 

 the tegulae punctate, apical two-thirds smooth and shining; pro- 

 pleura with a distinct carina at the cephalic margin; anterior third 

 of mesopleura with separated distinct punctures, the remainder 

 rugoso-punctate; metapleura rugoso-punctate on the basal third, 

 the remainder smooth and shining ; propleura, mesopleura, and meta- 

 pleura with sparse, erect, black hairs; anterior third of sides of 

 propodeum shining, with a few large punctures, posterior two-thirds 

 coarsely reticulate. 



Abdomen black, Avith red pubescence ; first tergite moderately long, 

 rugoso-punctate throughout, with moderately dense, long, black, 

 €rect hairs; second tergite with small, dense, confluent punctures 

 laterally, and small, separated punctures medially; sculpture of re- 

 maining tergites obscured by the dense pubescence ; anterior third of 

 second tergite with dense, long, erect, black hairs; posterior two- 

 thirds of tergite two, and tergites 3-8 clothed with dense, long, 

 orange-red, erect hairs; first sternite with a median longitudinal 

 oarina terminating in a distinct tooth at a point two-thirds the dis- 

 tance from the anterior to the posterior margins of the sternite; 

 second sternite with a large, median pit, densely filled with hairs, 

 closely, irregularly punctate at the sides, and with scattered p\mc- 

 tures medially: sternites 2-5 with a dense fringe of long, red hairs 

 at the apical margins. 



Legs black, thickly clothed with long, black hairs. 



Wings very dark fuscous. 



Allotype. — Male, Tucson, Arizona (F. H. Snow), in entomological 

 collection of University of Minnesota. 



Distribution. — Arizona, California, Nevada, New Mexico, and 

 Sonora. Mexico. 



