94 PROCEEDINGS OF THE AMERICAN ACADEMY. 



V. 435 (1872) ; Glov., 111. N. A. Ent., Orth., pi. 18, fig. 17 (1874> ; 

 Fletch., Rep. Exp. Farms Can., 1888, 63 (1889). 



Geuthophilus denticulatiis Scudd.!, Aun. Rep. Geogr. Surv. West 

 lOOth Mer., 1876, 279 (1877). 



Varying from light to dark castaneous with very feeble markiogs, 

 excepting usually a greater or less degree of infuscation along the 

 posterior margins of all the segments and the anterior margin of the 

 pronotum ; the pronotum is also sometimes feebly enlivened with ver- 

 miculate fuliginous markings and not infrequently a faint luteous line 

 may be traced along the middle of the dorsum, often conspicuous on 

 the pronotum and always slender ; the legs are concolorous with the 

 body. The antenme are rather coarse, tapering throughout uniformly, 

 the eyes small, distinctly smaller than the autennal scrobes, the legs 

 short and stouter than usual. Fore femora distinctly stouter than the 

 middle femora, arched superiorly, about a fifth longer than the prono- 

 tum and slightly more than half as long as the hind femora, the inner 

 carina with a single subapical spine besides being minutely serrulate 

 throughout. Middle femora having a variable number of spines but 

 usually 3-4 on the front carina, and on the hind carina a variable but 

 generally considerable number of minute spines or serrations besides 

 a short genicular spine. Hind femora about two thirds as long as the 

 body ((J) or a little less than that (9)? almost twice as long as the 

 fore femora, moderately stout, regularly tapering to the very apex with 

 no pregenicular constriction, about three times as long as broad, 

 glabrous, with a few feeble distant raised points above just before the 

 geniculation, the outer carina uniformly and lather delicately serrulate 

 except at base, more feebly in the female than in the male, the inner 

 carina similarly but more delicately serrulate, the intervening sulcus 

 tolerably broad apically but not at base. Hind tibiiB of male straight, 

 unusually stout, on the upper surface twice as broad in the middle as at 

 base, of the same length as the femora, armed beneath with a single 

 preapical spine besides the apical pair ; spurs subopposite, about equal 

 to or a little longer than the tibial depth, set at an angle of about 45° to 

 the tibia and diverging at an angle of 60° or less with each other, their 

 tips incurved ; inner middle calcaria slightly longer than the outer, 

 half as long again as the other calcaria, twice as long as the spurs and 

 nearly as long as the first joint of the tarsus. Hind tarsi nearly half 

 as long as the tibise, the first joint nearly as long as the others com- 

 bined, the second twice as long as the third and with it not so long as 

 the fourth. Cerci rather stout, tapering throughout, not much longer 

 than half the femoral breadth. Ovipositor as long as the pronotum, 



