REPORT OF THE STATE ENTOMOLOGIST 1908 81 
gg Antennal funicle with outer segments scarcely broader; 
coxae very narrowly separated........ Chaetophloeus Lec. 
f# 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. 
hh Antennal club with 4 segments; eyes sinuate rather than 
emarginate in front; foretibiae with a row of stout 
TeecthMoOnlm ties OLE MIMATOtie ere eee: Renocis Casey 
gg Eyes entire; prosternum distinct in front of the coxae; an- 
tennal club subcircular [pl. 7, fig. 20; pl. 10, fig. 28]...... 
Dendroctonus Erich. 
dd Antennal club not strongly compressed, subglobular or conical 
e Ist, 2d and 5th ventral segments of the abdomen subequal in 
length, 3d and 4th segments shorter; forecoxae widely sepa- 
rated [pl. 11, fig. 34] 
f Antennal club with the 1st and 2d segments subequal in length, 
each as long as segments 3 and 4 united [pl. 12, fig. 39]...... 
Hylastinus Bedel 
ff Antennal club with the Ist segment much longer than the 2d, 
nearly as long as segments 2, 3 and 4 united..... Scierus Lec. 
ee Ist and 5th ventral segments distinctly longer than the others; 
forecoxae narrowly separated or contiguous [pl. 11, fig. 33] 
f Mesosternum protuberant; 3d tarsal segment dilated and 
bilobed; elytra separately rounded at the base [pl. 8, fig. 23; 
pleats fig. Be F355 Osha at oe eR Oe nee ee Hylurgops Lec. 
ff 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 [pl. 9, 
hey 22" pl Tis tig: 42) 371+ TVomieus Mates sis02 9.05045. aee oe 
(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 [pl. 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 
OIL shel inten hdl Ppeeraie An meme Csi om aoe Pterocyclon Eich, 
dd Antennal funicle with more than I segment 
Caerotworax wider, than long.) 242. -aseeer Hypothenemus Westw. 
e ee Prothorax longer than. wide 
f Maxillary lobe pilose, without radiating spines on outer edge; 
WOOGHOLEES | plG seamless Gnathotrichus Eich. 
ff Maxillary lobe, with radiating spines on the outer edge; bark 
borers [pl. 6, fig. 14] 
