86 GEO. H. HORN, M. D. 



Series I-C. 

 Head not tubereulate, or very feebly so. Mesosternum not cari- 

 nate between the coxte. Margin of thorax not explanate, usually 

 with a basal marginal line. General color reddish, luteous, or yel- 

 lowish testaceous, without any part being either piceous or black. 



This series is more numerous in species than the preceding, and 

 consequently less homogeneous. The following table will assist in 

 their recognition : 



Gense at least moderately prominent ?. 



Genie not prominent beyond the eye 8. 



2. — Laige species (.30-.35 inch) ; punctures of thorax very coarse and irregularly 



scattered 3. 



Smaller species (.16-.22 inch) : punctures of thorax not unusually coarse, 



quite regularly scattered 4. 



3. — Clypeus very obtusely rounded each side of the emargination ; disc of thorax 



almost smooth at middle coucaviis. 



Clypeus subangulate each side ; disc of prothorax irregularly punctate over 



entire surface rubirtus. 



4.— Clypeus with a distinct denticle e;ich side of emargination ; basal marginal 

 Hue of thorax distinct. 

 Hind angles of thorax broadly rounded ; punctures of the elytral intervals 



coarser than those of the strife iiiilitaris. 



Hind angles distinct, but obtuse ; punctures of intervals not coarser than 



those of the striae seinulus. 



Clypeus not denticulate 5. 



."). — Thorax not fimbriate at sides 6. 



Thorax conspicuously fimbriate ; species very pale testaceous ; the upper 



tooth of anterior tibife very small 7. 



(i.— Base of thorax regularly arcuate, with distinct marginal line. 



Clypeus angulate each side of emargination ; hind angles of thorax rectan- 

 gular, slightly obtuse at tip ; punctures of elytral intervals rather close. 



nearly as coarse as those of the striae i*u1>iginO!<»iis. 



Clypeus with barely a trace of emargination, broadly rounded each side ; 

 hind angles of thorax obtuse, but distinct ; intervals sparsely finely 



punctate coiiseiitaiieiis. 



Base of thorax irregular, without trace of marginal line ; intervals of elytra 



with extremely few punctures liiteolus. 



7. — Oblique ridges of hind tibise very distinct. 



Anterior tibiae subtruncate, the apical tooth not much prolonged ; elytra 



with short brownish lines plialerioiUes. 



Anterior tibiae normal, the apical tooth much prolonged and very acute; 



elytra without lines Liarreap. 



Oblique ridges of hind tibia obliterated ; anterior tibiae normal, the ;ipical 

 tooth much prolonged and very acute; thorax with distinct, but fine 



basalline; elytra not maculate parens. 



S. — Genae regularly narrowed from the anterior border of the eye to the front ; 

 disc of prothorax very smooth, a distinct basal marginal line; pos- 

 terior tibiae stout segrottis. 



