318 THE CANADIAN ENTOMOLOGIST. 



punctuation of the thorax and front part of the body and the smooth, 

 shiny, nearly impunctate rear. Length, 2^ mm. 



Head convex, thickly and coarsely punctate, with central line, vertex, 

 margins of eyes and spots at base of antennae red-brown, eyes in $ rather 

 close ( o* unknown), antennae yellow, slightly darkened at tip, short and 

 thin, reaching about the middle of body in $ , thorax broader than long, 

 much constricted at the front, yellow, with reddish clouds, the three most 

 conspicuous being the bottoms of the standard M, the surface thickly and 

 coarsely reddish punctured, with here and there towards the middle a few 

 very small smooth yellow areas, depression behind well m.irked, but lobe 

 before the scutel small, sides angulate, very distinctly sinuate in the rear, 

 where the angle is finely rectangular ; elytra yellow, with reddish-brown 

 marks, the principal one being a transverse band on the convexity, dilated 

 forward at the suture to meet a broad V, the arms of which fail inside the 

 humerus, the general effect being a brown cross ; just anterior to the 

 transverse band is a line of four conspicuous yellow spots, which nearly 

 meet near the suture, another and smaller row coming from the humerus ; 

 there is also a rather prominent spot on each side and just back of the 

 scutel ; the tip and roots of the intervals are also pale. The punctuation 

 is confused in the scutellar area and backward to the convexity, the striae 

 are close and crowded, and towards the base show a tendency to become 

 irregular, the sixth and seventh intervals are broken just before the con- 

 vexity, and the marginal is also irregular, the whole surface is somewhat 

 shiny, but towards the convexity the punctuation becomes less marked, 

 and the surface is as if varnished ; the marginal stria is very broadly and 

 lightly curved round the humerus and lightly sinuate behind the lobe, 

 which is very inconspicuous and almost wholly occupied by a row of 

 punctures, all below, red-brown, with paler legs, fossa of J large, deep 

 and round. 



One $ , Chihuahua, Mexico ; 3 unknown. Type coll., Bowditch. 



A 9 specimen from Oak Grove Canon, Arizona, in collection of 

 Prof. Snow, I refer to this species. -It is in very bad order, and differs by 

 having the red colour more general and suffused, the punctuation is 

 thicker and more irregular. 



Pachybrachys rotundicollis, nov. sp. — Obscure (same colour as 

 pusillus) dirty-yellow, striate with black or brown punctures and very 

 black narrow sutural line ; thorax of $ constricted at both ends, so that 

 viewed from above the sides appear rounded. Length, 3-3^ mm. 



