THE CANADIAN ENTOMOLOGIST. 319 



Head yellow, convex, with rather coarse punctures and brown frontal 

 line, and faint vertex mark, eyes distant in both sexes, antennse yellow, 

 growing darker towards the tip, strong and stout in J , and reaching about 

 the middle of the abdomen, shorter and finer in 9 ; thorax yellow, with 

 scattered coarse brownish punctures, which are thickest where the M 

 would be, transverse depression well marked, especially in the 9 > an d 

 with a strong brown depression before the scutel, the o* has the thorax 

 constricted in front and behind, most strongly in front, so that the sides, 

 viewed from above, appear almost regularly rounded ; the 9 has the front 

 constricted but very litte, narrowed behind, so that the round appearance 

 does not show, sides swollen, lateral edge almost straight in £ , subangu- 

 late in 9 > hind angles obtuse ; elytra yellow, stout parallel, constricted 

 behind the shoulders, with striae of brown punctures, which are regular, 

 except in the scutellar area, and a slight break behind the humerus ; the 

 punctures are notably distant, so that the strite are very little impressed 

 and the intervals flat, the suture is black, the beginnings of a shield are 

 apparent, though not prominent, the marginal stria is moderately curved 

 and sinuate behind the humerus, lobe well developed, especially in 9 > 

 with a fine row of punctures, beneath black with epimera, last segment 

 and sides of abdomen and pygidium yellow, legs yellow, with paler 

 femoral ends, fossa moderately deep and semi-dull. 



Martin and Hamilton Counties, Kansas ; Greely and La Junta, 

 Colorado, Texas. Type coll., Bowditch. 



Pachybrachys atomus, nov. sp. — Small, or medium sized, black, 

 specked with yellow enamel, especially on the elytra. Length, 2-2^ mm. 



Head with convex front, yellow, with the usual frontal and vertex 

 marks, more suffused in °. than in £ , very finely punctured, eyes equally 

 distant in both sexes, antennae long and stout, reaching beyond middle of 

 abdomen in £ , becoming flattened and therefore apparently thicker 

 towards the end, thorax cylindrically narrowed towards the front, yellow, 

 very finely, thickly and irregularly punctured, with broadly suffused M 

 (the thickness of the M determining the punctuation), slightly depressed 

 behind, sides lightly bowed in both sexes ; elytra a little narrower than 

 the thorax, black, covered with comparatively coarse punctures, which are 

 confused over the whole surface ; the third, fifth and ninth intervals are 

 more or less plainly indicated, in the typical 9 they are traceable 

 throughout a good part of their length ; a large proportion of the broken 

 intervals over the elytra are raised in yellow enamelled spots, giving the 

 species the appearance of black specked with yellow, of these spots the 



