48 



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

 the males smaller and usually differing markedly 

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

 very short, linear in front of the coxse. 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 (Xyleborus tachy- 

 graphus Zimm.) . Southeastern United States. 

 Ambrosiodmus 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, Phthorophloeus 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, Xyloterinus politus Say.** 



Fig. 12, Phthorophloeus spinulosus Rey.* 



Fig. 13, Phthorophloeus piceae Sw.** 



Fig. 14, Hylaslinus obscurus Marsh.* 



Fig. 15, Leperisinus aculeatus Say.* 



Fig. 16, Hylurgops pinifex Fitch.** 



Fig. 17, Conophthorus coniperda Sz.* 



Fig. 18, Trypodendron bivittatum Ky.** 



Fig. 19, Micracis, undes sp.* 



Fig. 20, Carphoborus bifurcus Eichh.* 



Fig. 21, Gnathothrichus materiarius Fitch.* 



Fig. 22, Pityophthorus canadensis Sw.* 



Fig. 23, Lymantor decipiens Lee., inner face.* 



Fig. 24, Pseudopityophthorus minutissimus Zimm.** 



Fig. 25, Pityogenes hopkinsi Sw.* 



Fig. 26, Trypophloeus nitidus Sw.* 



Fig. 27, Polygraphus rufipennis Ky.* 



Fig. 27s, P. rufipennis Ky., showing 2nd segment of funicle partly divided. * 



Fig. 28, Lymantor decipiens Lee.; outer face.* 



Fig. 29, Cryphalus sp.* 



Fig. 30, Dendroctonus valens Lee.** 



Fig. 31, Dryocoetes affaber Mannh.* 



Fig. 32, Anisandrus minor Sw.** 



Fig. 33, Orthotomicus caelatus Eichh.* 



Fig. 34, Dryocoetes septentrionis Mannh.* 



Fig. 35, Ips concinnus Mannh.* 



Fig. 36, Chramesus icoriae Lee.* 



Fig. 37, Loganius ficus Sz.* 



Fig. 38, Pterocyclon mali Fitch.** 



*Original. ** Author's illustration. 



