﻿250 THE RNTOMOI.OOIST. 



very bright red hair; antennse brownish, scape strongly curved; 

 prominent red tubercles at bases of antennae ; face and lower side of 

 head, and legs, with very long dull white hair ; posterior lateral 

 margins of metathorax not dentate ; posterior sides of thorax forming 

 deeply excavated basins, impunctate in middle ; ventral keel of first 

 abdominal segment large, prominent, truncate, somewhat as in 

 D. viedea ; first two ventral segments of abdomen with whitish hair, 

 the others with red ; pygidial plate very well defined, striated. 



Hah. — La Jolla, California, August (Cockerell). Named after 

 Dr. F. B. Sumner, who kindly helped me to collect Mutillidse on 

 the grounds of the Scripps institution for Biological Eesearch 

 at La Jolla. In addition to the new species, we found D. j^acifica, 

 Cresson, and Nomicephagus harpalyce, Fox, the latter quite 

 common. D. sumneriella is related to D. creusa, Cress., but is 

 easily known by the abdomen above being covered with bright 

 red hair, even at the base. 



Nomicephagus acuum, n. sp. 



2 . Length about 8 mm. ; clear ferruginous, including legs and 

 antennae, apical part of the tridentate mandibles (formed as in 

 Pseudomethoca canadensis) black ; eyes broadly suboval, smooth and 

 shining ; third antennal joint a little more than half as long as 

 fourth ; head very broad, quadrate, face sunken and abbreviated ; 

 face with thin long white hair ; cheeks with appressed silvery hair ; 

 front and whole of top of head densely covered with appressed pale 

 golden hair, with scattered erect yellowish-white hairs also ; thorax 

 rather short, fiddle-shaped when seen from above, the margins of 

 metathorax strongly dentate ; metapleura smooth and shining, im- 

 punctate ; dorsal surface of thorax with appressed copper-red hair, 

 not hiding the densely and coarsely punctured surface ; anteriorly 

 there is a thin wide band of blackish hair, and at the sides of meta- 

 thorax silvery hair, there are also scanty erect hairs, partly dark ; 

 legs with thin silvery hair ; abdomen pyriform, the first segment 

 completely sessile on the second ; first segment with long erect white 

 hair basally, appressed brilliantly silvery hair apicolaterally, and 

 appressed black hair on apical middle ; second segment dorsally with 

 appressed bright copper-red hair, the apical margin very broadly 

 covered, with a band of black, and the sides (invading the coppery 

 area beyond the middle) with thin silvery hair ; segments 3 to 5 with 

 appressed silver hair and scattered erect hairs ; pygidial plate well- 

 defined, microscopically irregularly cancellate, but largely surrounded 

 and covered by shining reddish-golden hairs ; first ventral segment 

 without a prominent keel. 



Hah. — Needles, California, in the railway station, August 

 28th, 1915 {Hazel Andrews dh T. D. A. Cockerell). A distinct 

 species, readily known by the large head covered with pale 

 golden hair. It recalls Pseudomethoca sccevolella, Ckll. & Casad. 



