48 



hairs, the maxillary lobe pilose (PI. 9, fig. 11); 

 the males smaller and usually differing markedly 

 from the females (PI. 11, fig. 1); the prosternum 

 very short, linear in front of the coxae. Ambrosia- 

 beetles. 



The pronotum not serrate on the front margin, 

 quadrate, granulate over the entire surface; 

 the antennal club with the distal segments 

 showing slightly as a suture at the tip of the 

 inner side; the scutellum distinct, not de- 

 pressed; the body moderately stout; the 

 mesepimeron narrow, the metepisternum only 

 feebly emarginate behind {Xylehorus tachy- 

 graphus Zimm.). Southeastern United States. 

 Ambrosiodtnus Hopk. 



PLATE 10. 



IPID ANTENNAE; All Much Enlarged. 



Fig. 1, Hylurgopinus rufipes Eichh.* 

 Fig. 2, Alniphagus aspericollis Lee* 

 Fig. 3, Pseudohylesinus nebulosus Lee* 

 Fig. 4, Phthorophloeiis frontalis Oliv.* 

 Fig. 5, Phloeophthorus rhododactylus Rey.* 

 Fig. 6, Phthorophloeus liminaris Fitch.** 

 Fig. 7, Phloeosinus canadensis Sw.* 

 Fig. 8, Eccoptogaster piceae Sw.** 

 Fig. 9, Crypturgus atomus Lee* 

 Fig. 10, Ips pini Say." 



Fig. 11 

 Fig. 12 

 Fig. 13 

 Fig. 14 

 Fig. 15 

 Fig. 16 

 Fig. 17 

 Fig. 18 

 Fig. 19 

 Fig. 20 

 Fig. 21 

 Fig. 22 

 Fig. 23 

 Fig. 24 

 Fig. 2.5 

 Fig. 26 

 Fig. 27 



Fig. 28 

 Fig. 29 

 Fig. 30 

 Fig. 31 

 Fig. 32 

 Fig. 33 

 Fig. 34 

 Fig. 35 

 Fig. 36 

 Fig. 37 

 Fig. 38 



Xyloterinus politus Say.** 

 Phthorophloeus spinulosus Rey.* 

 Phthorophloeus piceae Sw.** 

 Hylastinus obscurus Marsh.* 

 Leperisinus aculeatus Say.* 

 Hylurgops pinifex Fitch.** 

 Conophthorus coniperda Sz.* 

 Trypodendron bivittatum Ky.** 

 Micracis, undes sp.* 

 Carphoborus bifurcus Eichh.* 

 Gnathothrichus materiarius Fitch.* 

 Pityophthorus canadensis Sw.* 

 Lymantor decipiens Lee, inner face.* 

 Pseudopityophthorus minulissimus Zimm.** 

 Pityogenes hopkinsi Sw.* 

 Trypophloeus nitidus Sw.* 

 Polygraphus rufipennis Ky. 



Fig. 27b, p. rufipennis Ky., showing 2nd segment of funicle partly divided.* 



Lymantor decipiens Lee; outer face.* 

 Cryphalus sp.* 

 Dendroctonus valens Lee** 

 Dryocoetes affaber Mannh.* 

 Anisandrus minor Sw.** 

 Orthotomicus caelatus Eichh.* 

 Dryocoetes septentrionis Mannh.* 

 Ips concinnus Mannh.* 

 Chramesus icoriae Lee* 

 Loganius ficus Sz.* 

 Pterocyclon mali Fitch.** 



♦Original. **Author's illustration. 



