40 



EE The anterior coxae separated from the head by a very short 

 prosternum; the tibiae margined with long slender teeth on 

 the outer side. Pseudocryphalus Sw. Page 57 . 



BB The third foretarsal segment distinctly widened and emarginate or 

 bilobed (PL 12, fig. 1). 

 C The antennal club unsegmented, the funicle attached to side of 

 club (PI. 10, fig. 36); beak extremely short, antennal scrobes 

 circular, attaining the eyes; eyes entire; shape of body hump- 

 backed (PI. 9, fig. 28) ; pronotum much wider than long, strongly 

 scabrous on the sides; elytra with declivity oblique, continuing 

 the curve of the disc, the pubescence on the elytra of short scale- 

 like hairs and stout bristles (PL 9, fig. 28a). 



Chramesus Lee. Page 58. 



PLATE 9. 

 IPID STRUCTURES; All Much Enlaeqbd. 



Fig. 1, Orthotomicis caelatus Eichh., labium.* 



Fig. 2, Hylurgops pinifex Fitch, egg.* 



Fig. 3, Dendroctonus valens Lee, egg.* 



Fig. 4, Gnathotrichus materiarius Fitch, labium.* 



Fig. 5, Hylurgops pinifex Fitch, tarsus, showing wide and bilobed 3rd segment.** 



Fig. 6, Xylolerinus politus Say, labium.* 



Fig. 7, Micracis suiuralis Lee, labium.* 



Fig. 8, Anisandrus populi Sw., labium.* 



Fig. 9, Pityogenes hopkinsi Sw., labium.* 



Fig. 10, Trypodendron retusus Lee, labium.* 



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. 25 

 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 

 Fig. 39 

 Fig. 40 

 Fig. 41 

 Fig. 42 

 Fig. 43 



Anisandrus minor Sw., maxilla. 



Ips pini Say, maxilla.** 



Ips calligraphus Say, labium.* 



Dryocoetes septentrionis Mannh., labium.* 



Pterocyclon mali Fitch', tibia and tarsus.** 



Eccoptogaster picece Sw., fore tibia, lower face.** 



Eccoptogaster piceae Sw., fore leg, tarsus retracted.** 



Hylastes, a portion of the tarsus showing emarginate 3rd segment. 



Xyloterinus politus Say, metepisternum.* 



Pityophthorus, metepisternum.* 



Trypodendron retusus Lee, metepisternum.* 



Xyloterinus politus Say, sho'W'ing divided eyes.** 



Phthorophloeus piceae Sw., tibia and tarsus.** 



Pseudopityophthorus minutissimus Zimm., fore leg.** 



Leperisinus aculeatus Say, venter of abdomen.** 



Hylurgops pinifex Fitch, venter of abdomen.** 



Xyleborus celsus Eichh., labium.* 



Chramesus icoriae Lee, side view.** 



Fig. 28a, Chramesus icoriae Lee . . dorsal view.** 



Conophthorus coniperda Sz., labium.* 



Hylastes sp., dorsal view of head and pronotum.** 



Hylurgops pinifex Fitch, dorsal view of head and pronotum.^ 



Pterocyclon fasciatum Lee, labium.* 



Trypodendron bivittatum Ky., hind tibia and tarsus.** 



Trypodendron betulae Sw., hind tibia and tarsus.** 



Hylurgops pinifex Fitch, side view of mesosternal process.* 



Polygraphus rufipennis Ky., side of head; male.** 



Dendroctonus pseudotsugae Hopk., epistomal process.* 



Dendroctonus valens Lee, epistomal process.* 



Dryocoetes americanus Hopk., prosternal process.** 



Anisandrus minor Sw., prosternal process.** 



Ips concinnus Mannh., labium, side view.* 



Hylurgops pinifex Fitch, labium.* 



Stephanoderes dissimilis Zimm., labium.* 



♦Original. ** Author's illustration. 



