INVESTIGATION'S ON THE MUTILLID WASPS 255 



almost the basal third of the second tergite is clothed with black 

 pubescence. The genitalia of the males are identical with those of 

 aureola. There is a very great variation in size among the females, 

 the lengths varying from 7 to 16 mm., while in the males the length 

 varies from 9 to 12 mm. Cresson's type has been examined and is 

 identical with specimens recorded here. The distribution of this 

 variety seems to be more southern than is the case with anireola^ al- 

 though there is a specimen, undoubtedly variety paciflca, from 

 Victoria, British Columbia, and a specimen of aureola from Santa 

 Paula, California, so that the ranges of these two forms are not 

 geographically separated. 



107. DASYMUTILLA MIMULA, new species 

 Plate 4, fig. 26 



Male. — Head and thorax black; abdomen clothed with light ful- 

 vous pubescence. Length, 13 mm. 



Head black, clothed with long, erect and recumbent, black hairs; 

 mandibles tridentate, clypeus feebly bidentate medially on the an- 

 terior margin, the apical half coarsely, and confluently punctate; 

 scape punctured and clothed with coarse, black hairs; first segment 

 of flagellum slightly shorter than the second; antennal scrobes dis- 

 tinctly carinate above; front with large, shallow, confluent punctures; 

 vertex and genae with rather sparse, shallow punctures; relative 

 widths of head and thorax, 6.5-8. 



Thorax black, clothed with long, erect and recumbent, black hairs ; 

 pronotum coarsely, confluently punctate, the punctures larger and 

 deeper towards the lateral margins, the cephalic margin of the pro- 

 notum not emarginate medially; mesonotum, scutellum and meta- 

 notum coarsely and confluently punctate; propleura punctate ante- 

 riorly, rugose along the posterior margin ; anterior half of mesopleura 

 with distinct, sparse punctures, the posterior half with very large, 

 close, punctures; metapleura shining, impunctate except for a few 

 scattered punctures ventrally ; sides of propodeum broadly, shallowly 

 reticulate; dorsum and posterior face of propodeum very broadly 

 and deeply reticulate; tegulae smooth and shining except for a few 

 punctures near the basal margin. 



Abdomen black ; first segment of abdomen subnodose, ventral carina 

 not produced into a prominent tooth, tergite smooth, with scattered 

 punctures anteriorly, the posterior third closely, confluently punctate, 

 clothed with sparse, long, black hairs ; second tergite with moderate, 

 separated punctures, those near the lateral basal margins closer and 

 elongate, clothed with long, black hairs on the anterior half and long, 

 light fulvous hairs on the posterior half ; tergites 3-6 distinctly punc- 

 tate, clothed with long, light fulvous pubescence; last tergite longer 



