47 



" trough " a long, spiral, longitudinally striate 

 band. (PI. 8, fig. 2)]. 



Pityogenes Bedel. Page 104. 



II The intercoxal process of the prosternum long 

 and acute (PL 9, fig. 39); the front not 

 deeply excavated in either sex; the antennal 

 club usually without sutures on the inner side 

 or only at the extreme tip; [the "closing teeth" 

 of the proventriculus shorter than the mastica- 

 tory plate; the " trough " of the male genitalia 

 not a longitudinally striate band]. 

 J The concavity of the declivity separated from 

 the apical margin of the elytra by the 

 strongly produced, horizontal, plate-like, 

 acute apical margin of the declivity (PI. 14, 

 fig. 2); the antennal club flattened, sutured 

 throughout on the upper face (PL 10, 

 fig. 10); the " trough " of the male genitalia 

 divided into two short rods; the ligula 

 depressed and the mentum very slender, 

 (PL 9, fig. 13). Ips De Geer. Page 107. 

 JJ The declivity with the apical margin only 

 slightly produced, at most forming a very 

 short acute apical ridge, the plate dividing 

 the declivital apex from the elytral apex, 

 when present, oblique and very short; the 

 antennal club thickened at the base, and 

 obliquely truncate distally on the upper 

 face (PL 10, fig. 33); the ligula pine-cone- 

 shaped, the mentum moderately elongate 

 (PI. 9, fig- 1). 



K The front of the female not densely clothed 

 with long yellow hair; the declivital con- 

 cavity separated from the elytral apical 

 margin by a complete margin, usually 

 acute and distinct though not strongly 

 produced, the antennal club usually 

 longer than wide, thick at the base with 

 the oblique truncate distal face steep; 

 the 7th abdominal tergite without 

 spiracles. (PL 10, fig. 33). 



Orthotomicus Ferr. Page 121. 

 KK The front of the female densely clothed 

 with very long yellow hair (PL 16, 

 fig. 3); the declivital concavity less 

 pronounced, with the apical declivital 

 margin almost absent towards the mid- 

 dle of the apex so that the sutural sulci 

 extend to the apical margin of the elytra 

 (PL 15, figs. 5, 6); the antennal club 

 usually wider than long, strongly de- 

 pressed distally; the seventh tergite 

 with spiracles. 



Pityok teines Fuchs. Page 123 



HH The fore tarsi strongly widened distally (PL 11; 

 fig. 2); the mouth parts with sparse slender 



