40 THE CANADIAN ENTOMOLOGIST. 



9. Punctures of the pronotum fine, sparse, very faintly muricate, much 

 stronger, closer and muricate toward the sides, without trace of a 

 median impunctate line. Body very slender, dull ; prothorax as 

 long as wide, rounded at the sides and slightly prominent just before 

 the middle ; elytra moderately opaque, the tubercles moderately 

 small, in mutual contact, extremely feeble in elevation and separated 

 by fine feeble lineiform depressions ; prosternum rather finely, 

 acutely tuberculose. Length 15.0 mm.; width 5.0 mm. Arizona. . . 



piidens, n. sp. 

 Punctures of the pronotum coarser, strongly muricate, divided along the 

 middle by a more or less incomplete narrow impunctate line ... 10 

 10. Elytral tubercles in mutual contact, rather strongly elevated and some- 

 what shining-, the incised lines between them fine but distinct ; 

 prothorax fully as long as wide, subcordate, coarsely and 

 conspicuously muricato-punctate, very coarsely toward the sides, the 

 latter only very obtusely prominent just before the middle; elytra 

 elongate, each of the small muricate punctures, at the hind margins 

 of the tubercles, bearing a rather distinct yellow seta ; prosternum 

 strongly tuberculose. Length 17.5 mm.; width 5.9 mm. Utah 



(south-western), Weidt Uteauus, n. sp. 



Elytral tubercles clearly isolated by the densely opaque interstices, 

 very flat but very much more shining than the surface separating 

 them, larger and smaller alternating in very obscure inconstant lines 

 at some parts of the disk ; prothorax cordate, fully as long as wide, 

 the punctures strongly muricate but not much larger or closer 

 toward the sides, the latter rounded, only very obtusely prominent 

 before the middle ; elytra elongate ; general form very slender ; 

 prosternum tuberculose. Length 17.0 mm.; width 5.5 mm. Utah.. 



Mo7-Jiion, n. sp. (Horn, MS.) 

 Elytral tubercles very small, not larger than the muricate punctures of 

 the pronotum ; entire surface very densely opaque as in Aloniioii, 

 the body larger and less slender ; prothorax formed nearly as in 

 Mor?no}i, the punctures strong and only slightly muricate on the 

 median parts, becoming very coarse and muricate toward the sides; 

 prosternum coarsely, deeply punctate, not tuberculose. Length 

 18.8 mm.; width 6.5 mm. Utah opacus, Horn 



II. Terminal grooves of the elytra very long, about a fifth of the total 

 length. Body very slender, dull in lustre ; prothorax a little longer 

 than wide, the sides nearly straight and subparallel anteriorly, 



