L".K» Till': CANADIAN KNTOM OHKilST . 



Pachybrachys Snowi, nov. sp. — Large, stout, cylindrical, yellow, 

 with red-brown markings, or sometimes nearly black. Length 3-4)^ mm. 

 Head flat, yellow, with usual vertex and central line, antennal spots and 

 margin of labrum in red-brown, finely and rather thickly punctured, 

 antennae short and frail, reaching about the middle of the body ; eyes in 

 9 comparatively near, thorax much broader than long, shining, narrowed 

 in front so as to appear swollen behind, moderately and in parts sparsely 

 punctured with medium-sized reddish punctures, M broadly and fairly 

 well defined in the prevailing red-brown, with a smooth median yellow line 

 reaching beyond the middle, rear with only indications of a transverse line 

 and showing only a very moderate antescutellar lobe ; the transverse 

 depression becomes vague at the sides and disappears in the arms of the 

 M, the lateral edge, which is angulate, has the usual marginal stria distant 

 from the margin, leaving a distinct wide smooth border, slightly tapered 

 at the front, hind angles obtuse, rounded ; elytra stout, broad, slightly 

 compressed at the sides, yellow, with brown punctures and spots, scutel 

 broad and truncate, forward reflexed edge of elytra sharp and very well 

 marked, punctuation coarse and diffuse except towards the rear and 

 sides, where it falls into rows, with the resulting broad and rather con- 

 vex cosUe, outside standard spots are well marked in brown-red, the rear 

 ones being connected with the inside spots, forming a broken band across 

 the convexity ; the middle spots are also somewhat joined, the anterior 

 inside spot is diffuse and the irregular broken yellow, smooth intervals are 

 rather noticeably large towards the side and middle rear, marginal stria 

 with a deep curve around the humerus and abruptly sinuate behind, lobe 

 wide, with a sparse row of large punctures on the edge, below red-brown 

 picked out with lighter on the epimera, sides of abdomen and pygidium, 

 fossa of $ a deep round pit, legs yellow-brown, with darker ring on 

 thighs. 



Prescott, Baboquivaria Mts., Santa Rita Mts., Douglas, Arizona. 



Some of the examples are largely suffused with black, but except in 

 colour they do not seem to differ. The largest of our native forms ; 

 named after my friend, the late Prof. Snow. 



PachybracJiys crassus, nov. sp. — Stout, cylinder-shaped, pale yellow- 

 ish white, surface dull, with livid punctures, which are finer on prothorax 

 and very coarse on the elytra. Length, 4 mm. 



Head yellow, convex in front, with well-marked livid central line, 

 thickly punctured except on the yellow parts, eyes moderately distant in 

 9, very narrowly margined with livid, antennae frail and thin, about half 



