68 



CC The strial punctures usually indistinct and always small; in very 



narrow, moderately impressed striae; the second interspace on the 



declivity nearly or quite as wide as the 1st or 3rd. 



D The elytral interspaces on the disc and sides sparsely nearly 



uniseriately granulate; the declivital interspaces only faintly 



convex, with the granules uniseriate, almost obsolete. A 



very small, brightly polished western species; length, 2-2 



mm. California. vandykei Sw. 



DD The elytral interspaces on the disc and sides densely or rather 



sparsely but confusedly granulate; the declivital interspaces 



moderately convex with the serrations well developed. 



E The elytral interspaces rather coarsely sparsely granulate 



and somewhat convex; the striae distinctly impressed; 



the second interspace on the declivity slightly narrower 



than the 1st or 3rd and moderately narrowed distally, 



shining, smooth, feebly punctured, nearly flat, and unarmed; 



the serrations of the first interspace uniseriate in both sexes; 



the pubescence longer than usual and distinct. 



canadensis Sw. Page 69. 



EE The elytral interspaces closely granulate, wide and flat; 

 the striae hardly impressed; the 2nd interspace on the 

 declivity as wide as the others, closely roughly punctured 

 and more or less serrate; the serrations of the first inter- 

 space confused in the female; the pubescence very short 

 and not conspicuous. 



F The pronotum densely finely punctured; the elytral 

 interspaces densely, rather finely granulate, the 

 pubescence of the declivity minutely hairlike in both 

 sexes, hardly scale-like; a small species, less than 3 mm. 

 in length. dentatus Lee. Page 70. 



FF The pronotum closely finely punctured; the elytral 

 interspaces rather coarsely granulate; the pubescence 

 of the declivity minutely scale-like; a larger species, 

 length, 3 5 mm. Utah, utahensis Sw. 



AA The mesosternum oblique between the coxae; the antennal club very 

 elongate with the sutures very strongly oblique; usually larger species; 

 the intercoxal piece of the prosternum rather narrow. 



B The elytral declivity with the second interspace narrower than the 

 1st or 3rd, at least towards the apex; the male with the 1st 

 interspace on the declivity unarmed or serrate only at the top of 

 the declivity; the smooth, shining area of the proepisternum large, 

 extending nearly to the caudal margin. 



PLATE 15. 

 IPID STRUCTURES ALL MUCH ENLARGED. (ORIGINAL.) 



Fig. 1, Pityogenes hopkinsi Sw., front of head, female. 

 Fig. 2, Pityogenes knechteli Sw., front of head, female. 

 Fig. 3, Pityogenes hopkinsi Sw., declivity of elytra, male. 

 Fig. 4, Pityogenes carinulatus Lee., declivity of elytra, male. 

 Fig. 5, Pityokteines sparsus Lee., declivity of elytra, male. 

 Fig. 6, Pityokteines sparsus Lee., declivity of elytra, female. 

 Fig. 7, Phloeosinus sequoice Hopk., declivity, male. 

 Fig. 8, Phloeosinus punctatus Lee., declivity. 



