REPORT OF THE STATE ENTOMOLOGIST I908 81 



gg Antennal funicle with outer segments scarcely broader; 



coxae very narrowly separated Chactophloeus Lee. 



if Front coxae contiguous 



g Eyes emarginate or sinuate in front ; prosternum in front of 



coxae very short or obsolete ; antennal club oval-elongate 



h Antennal club with 3 segments ; eyes emarginate in front ; 



foretibiae with very few teeth on the outer margin 



Carphoborus Eich. 



Iih Antennal club with 4 segments ; eyes sinuate rather than 



emarginate in front ; foretibiae with a row of stout 



teeth on the outer margin Renocis Casey 



gg Eyes entire; prosternum distinct in front of the coxae; an- 

 tennal club subcircular [pi. 7, fig. 20; pi. 10, fig. 28] 



Dendroctonus Erich. 

 dd Antennal club not strongly compressed, subglobular or conical 

 e 1st, 2d and 5th ventral segments of the abdomen subequal in 

 length, 3d and 4th segments shorter; forecoxae widely sepa- 

 rated [pi. II, fig. 34] 

 f Antennal club with the ist and 2d segments subequal in length, 



each as long as segments 3 and 4 unittfi [pi. 12, fig. 39] 



Ilylastinus Bedel 

 ff Antennal club with the 1st segment much longer than the 2d, 



nearly as long as segments 2, 3 and 4 united Scleras Lee. 



ce 1st and 5th ventral segments distinctly longer than the others; 

 forecoxae narrowly separated or contiguous [pi. 11, fig. i^,^ 

 f Mesosternum protuberant ; 3d tarsal segment dilated and 

 biloiicd ; elytra separately rounded at the base [pi. 8, fig. 2^ ; 



pi. II, fig. 31, 35, 36] Hylurgops Lee. 



if Mesosternum not protuberant ; 3d tarsal segment subequal in 



width to the 2d, emarginate rather than bilobed ; bases of 



elytra in a nearly straight line not separately rounded [pi. 9, 



fig. 22 ; pi. II, fig. 32, ^7\ Tomicus Latr., 1802 



(Hylastes Erich.) 



Genera of the Ipinae 



a Antennal funicle with less than 6 segments 

 b Antennal club pubescent on both sides 



c Antennal club annulated on both sides ; eyes not completely divided 

 d Antennal funicle with only one segment [pi. 4, fig. 8] 

 e Body robust; foretibiae without transverse ridges on outer side.. 



Corthylus Erich. 

 ee Body slender; foretibiae with transverse ridges on the outer side 



[pi. 5, fig. 11] Pterocyclon Eich. 



dd Antennal funicle with more than i segment 



e Prothorax wider than long Hypothcnemus Wcstw. 



ee Protiiorax longer than wide 



/ Maxillary lobe pilose, without radiating spines on outer edge; 



woodborers Ipl. 6. (x^. i;| riuathotrichus Eich. 



ff Maxillary lobe, with radiating spines on the outer edge ; bark 

 i)orcrs [pi. 6, fig. 14] 



