INVESTIGATIONS ON THE MUTILLID WASPS 101 



I take pleasure in naming this species for my friend Prof. O. 

 A. Stevens, who collected the series of specimens from Medora, North 

 Dakota. 



This species is very closely related to nwpera Mickel. The prin- 

 cipal difference between the two is the color of the pubescence of the 

 head and thorax. The sculpturing and form of the, body is prac- 

 tically the same in both. The entire absence of a scutellar scale, and 

 the jjyriform thorax with the posterior face of the propodeum 

 broadly rounded into the dorsum of the propodeum are characteristic 

 features which distinguish this species, as well as nwpera from any 

 of those superficially resembling it. The paratypes vary in size from 

 9.5 mm. to 12.5 mm.; there is practically no variation in the color of 

 their pubescence. 



26. DASYMUTILLA MEDORA, new species 



Plate 1, fig. 6 



Male. — Black; vertex, pronotum, mesonotum, scutellum, apical 

 third of second tergite and tergites 3-6 clothed with long, erect, yel- 

 low pubescence; tegulae finely, setigerously punctate throughout, the 

 hairs yellowish ; second sternite simple without a median pit or other 

 modification; length, 10 mm. 



Head black; vertex clothed with sparse, long, erect, yellow pu- 

 bescence, the remainder of the head clothed with sparse, long, erect, 

 black pubescence ; mandibles acute at the tips, feebly bidentate with- 

 in about one-third the length of the mandibles from the apex ; ante- 

 rior margin of clypeus slightly bidentate medially; clypeus densely 

 punctate; scape with a strong carina, and an indication of a second 

 carina beneath, closely, indistinctly punctate, clothed with coarse, 

 erect, black hairs; first segment of flagellum distinctly shorter than 

 the second (measured dorsally) ; antennal scrobes not at all carinate 

 above; front with moderate, close, shallow punctures; vertex and 

 genae with the punctures the same size but separated ; relative widths 

 of head and thorax, 5.75-7. 



Thorax black; pronotum, mesonotum, scutellum and metanotum 

 with long, erect, yellow pubescence, remainder of thorax with long, 

 erect, black pubescence ; cephalic face of pronotum sparsely punctate, 

 evenly rounded into the dorsum, not emarginate medially ; dorsum of 

 pronotum, mesonotum, and scutellum densely, more or less con- 

 fluently punctate; tegulae finely, setigerously punctate throughout, 

 the hair yellowish; propleura scatteringly punctate, the punctures 

 more or less indistinct; mesopleura with large, scattered punctures 

 anteriorly, large, contiguous, somewhat confluent punctures poste- 

 riorly; metapleura glabrous, impunctate, except for scattered, large 



