Scolytid proventricuH 



1 Pityogenes species, internal aspect of flattened segments, x iio 



2 r o m i c 11 s balsa in ens Lee, end view, x i i o 



3 G n a t h () t r i c h n s ni a t e r i a r i u s Mtch. internal aspect of flattened 



segments, x no 



4 Phloeosinns dentatns .Say, internal aspect of flattened seg- 



ments. X IIO 



5 Pol>'graphus rufipennis Kirb), end \ae\v. x i lo 



6 Chramesns hicoriae Lee, internal aspect of flattened seg- 



ments. X no 



7 Xyleborus celsns Eich., internal aspect of flattened seg- 



ments. X IIO 



8 Xyloterus 1 in eat us Kirby, internal as])ect (if flattened seg- 



ments. .X I lO 



9 I ) r y o c I) (• t (• s autograph us Ratz., intcM'nal aspect of flattened 



segments, x i lo 



10 Tomicus integer Eich., internal aspect of flattened segments. 



X I lO 



11 Dryocoetes sp., internal aspect of flattened segments, x iio 



798 



