THE CANADIAN ENTOMOLOGIST. 69 



obliteration of the frontal chevrons and elytral costpe, the non-sulcation of 

 the median thoracic line and by other characters. The description is 

 drawn up from a male ; the female differs thus : last ventral broadly 

 triang'ularly emarginate, with an indication of a lobe in the bottom of the 

 emargination, as in chrysoela ; however, this structure is a trifle un- 

 symmetrical. and nviy be accidental. The prostcrnum is more coarsely 

 punctured and less hairy than in the male, the anterior tibiae are not 

 dilated at tip, and the middle tibiae are straight, while the front of 

 the head is entirely cupreous. 



The name refers to the tribe of Indians inhabiting the neighbourhood 

 from which the beetle came. The type was taken with two other slightly 

 smaller specimens, by beating desert shrubs near Independence, in 

 Owen's Valley, California, during the month of July. A female from 

 Williams, Arizona, is somewhat more strongly sculptured, and the under 

 side of the body is bluish. 



Agrilus, Steph. 



The species described below seem to be well marked and easily 

 recognizable, and thus worth describing separately. It is probable that 

 the impetus given to the study of the genus through Dr. Horn's 

 monograph will result in the detection of a number of undescribed forms. 



A. pifialicus, n. sp. — Rather more robust and less narrowed behind 

 than usual. Head, thorax and scutellum blue-black ; elytra metallic 

 green, with a dark sutural stripe. Antennas short, blackish, serrations 

 beginning on the fourth joint. Front of head deeply and broadly 

 channelled, the sulcus extending from the occiput on to the clypeus, the 

 bottom clothed with close, snow-white pubescence ; surface of head 

 granulate behind the eyes, the remainder, where visible, transversely 

 rugose. Thorax broader than long, wider in front of the middle margin, 

 sinuous in lateral view ; surface somewhat irregularly convex, closely 

 strigose, the strigte transverse in front, oblique near the base and over 

 most of the disc, longitudinal near the sides ; median line fine, distinct 

 near the base, interrupted about the middle ; sides slightly arcuate, 

 sinuate near the base, hind angles nearly rectangular, not carinate, front 

 angles with a longitudinal sjiot of white pubescence, which diverges 

 a little from the margin posteriorly and does not reach the middle of its 

 length. Scutellum rough, not carinate. Elytra with the sides sinuate, 

 apices separately rounded, margin serrulate posteriorly, surface granulate, 

 a snow-white spot of pubescence on each side near the scutellum, which 



