2\)2 THE CANADIAN ENTOMOLOGIST. 



convexity ; tin's leaves the two lateral intervals and all the convexity and 

 rear regularly and deeply punctate striate, the tip is smooth, marginal 

 stria sinuate, the lobe well developed, with well-defined row of marginal 

 punctures on the curve, below lightly pubescent, with yellow legs, with a 

 tendency to have the middle parts of the body livid, pygidium yellow ; the 

 dark part of the last abdominal segment is continued over the pygidium 

 on three dark points, the fossa of V deep, long and shiny, rather pointed 

 in front. 



o* , ? , Prescott, Arizona. Type coll., Bowditch. 



\\"ah the above I associate a 9 specimen from Chad's Ranch, Utah, 

 which differs in the thorax having no M, but only the transverse rear 

 markings with the end depressions strongly marked, the elytra are yellow 

 and have only the humerus and two round spots on the convexity livid 

 brown, and the punctuation is rather more diffuse. 



Pachybrachys tumidus, nov. sp. Medium sized, cylinder shaped, 

 semi-shining, yellow with very indistinct livid clouds, elytra rather coarsely 

 punctured and with much-swollen cosUb. Length, 2j _• mm. 



Head yellow, front convex, finely punctured, with daik frontal mark 

 and vertex, eyes distant, antennae short and frail in o , barely one-half the 

 length of the body, becoming darker at the tip, thorax wider than long, 

 scarcely narrowed at either end, finely and irregularly punctured, yellow, 

 the M showing as five livid clouds, which hardly connect, the outside ones 

 forming the ends of the transverse depression, which is quite well marked, 

 lateral edge curved ; elytra stout and parallel, diffusely punctate in the 

 scutellar area, and with a tendency to extend the diffusion to the humerus 

 at the side and along the suture at the rear. The basal parts of the third 

 and fifth intervals are much attenuated, the remainder of the surface is 

 striate punctate and the resulting intervals appear smooth and swollen, 

 with a fairly prominent shield, everything else is regular, except there is a 

 disturbance below the humerus, the colour is dull yellow, the standard 

 spots give just a faint dash of livid, the shoulder knobs are dark, marginal 

 stria, fairly well curved round the humerus and sinuate behind, lobe 

 medium, with a row of marginal punctures, body below livid-brown, with 

 epimera, sides of abdomen, last segment and pygidium picked out in 

 yellow, fossa shallow and dull, legs yellow, the presternum is wide and 

 only slightly concave. 



One ° , Prescott, Arizona. Type coll., Bowditch. 



Very like a small washed-out cylindricus, but elytral intervals more 

 swollen. 



(To be continued.) 



