42 



CC The antennal club segmented; the funicle attached to the end of the 



club. 



D The antennal club loosely segmented, the segments produced on 

 one side, sublamellate (PI. 10, figs. 4, 6). 



Phthorophlceus Rey. Page 58 . 



DD The antennal club connate, the segments equal sided. 

 E The antennal funicle 5-segmented. 



F The fore coxse very narrowly separated, practically con- 

 tiguous; the metepimeron visible in part, variably 

 distinct; the epistomal process basal and well-developed; 

 the antennal club flattened, thickened at the base, 

 as wide as or usually wider than long (PL 12, fig. 2); 

 the eyes entire; the pronotum frequently wider than 

 long, punctured; the elytral base not elevated, arcuate 

 and finely crenulate; the scutellum oblique; the fore- 

 tarsal segment 3 wide and deeply bilobed; the 

 ligula in a wide band extending over the distal end of 

 the mentum; the proventriculus with the diagonal lines 

 of teeth very long, the transverse lines on the disc very 

 strongly developed (PL 18, fig. 10). 



Dendroctonus Erich. Page 60 . 



FF The forecoxse moderately or narrowly separated; the 

 metepimeron covered by the elytra; the antennal club 

 much longer than wide; the front without a basal 

 episfcomal process. 



G The funicle with the outer segments distinctly broader; 

 the club elongate, pubescent, compressed, with three 

 more or less strongly oblique sutures; the eyes deeply 

 emarginate; the forecoxse moderately distant; the 

 prosternum moderately short; the alternate inter- 

 spaces of the declivity usually serrate, more strongly 

 in the male; the metepisternum wide, (PL 10, fig. 7). 

 Phloeosinus Chap. Page 67 . 



GG The funicle with the outer segments hardly widened; 

 the club compressed, obtuse at the tip; the forecoxse 

 narrowly separated; the prosternum very short in 

 front of the coxse; thickly clothed with coarse erect 

 hairs. Cal. Chaetophloeus Lee. 



EE The antennal funicle 7-segmented. 



F Fore coxse rather widely separated; proventriculus with 

 diagonal lines of discal teeth absent or very feebly 

 developed. 



G Antennal club strongly compressed; elytra gradually 

 depressed behind without a steep declivity; venter 

 of abdomen bent upwards behind; clothed above 

 with scales; the disc of the proventriculus not finely 

 granulate, (PL 10, fig. 15). 



Leperisinus Reitter. Page 70. 



GG Antennal club only moderately or slightly compressed; 

 elytra with declivity distinct and abrupt; clothed 

 chiefly with hairs. 



H Antennal club hardly flattened, subconical, with 

 1st segment almost as long as 2nd and 3rd united; 



