TRIT.E XX. CEUTOKI1YNCHINI. 4i)T 



XIII. PELENOMUS Thomson, 1860. 

 (Gr., "monstrous" -j- "shoulder.") 



Beak short, stout, more or less widened toward tip ; eyes 

 round, strongly convex, completely uncovered in repose; thorax 

 wider than long, narrowed in front, without ocular lobes, its front 

 margin with two prominent suberect cusps or teeth, which, with 

 the two lateral tubercles, cause it to appear 4-tuberculate when 

 viewed from above; elytra oval, wider at base than thorax; mid- 

 dle and hind coxa? widely separated; claws with a short acute 

 tooth, overlooked by LeConte and Diet/, according to Champion. 

 Six of the eight known species occur with us. 



KEY TO EASTERN SPECIES OF PELENOMUS. 



a. Antennae more slender, second and third joints of funicle distinctly 



longer than those which follow. (Fig. 99, e.) 711. SULCICOLLIS. 



act. Antennae stouter, joints 2 and 3 of funicle very little longer than 



those which follow. 



o. Elytra! intervals, especially those on sides, each with a row of 

 acute granules; front concave; dorsal channel of thorax feeble or 

 wanting. 



c. Scales of upper surface brown with a brassy tinge; second ventral 



of male with a large yellowish elevated semicircular scale on 



its front margin. 712. ASPEKULTJS. 



cc. Scales of upper surface uniform grizzly-gray, without brassy 



tinge; male without ventral scale as above. 713. GRISEUS. 



l)b. Intervals without granules; front not concave. 



d. Dorsal groove of thorax distinct; male with ventral segments 



2 4 unmodified. 



e. Beak rather slender, as long as head; fourth tarsal joint 



shorter than the two preceding. 714. SQUAMOSUS. 



ee. Beak stout, shorter than head; fourth tarsal joint as long as the 



two preceding. 715. PUSIULTJS. 



dd. Dorsal groove represented by a shallow postapical impression; 



ventrals 2 4 of male with a broad, shallow, pubescent median 



impression. 716. IMPEESRIVENTRIS. 



711 (8857). PELEXOMUS SUI.CICOLLTS Fahr., Schon., 1843, 346. 



Broadly oval. Dark piceous, clothed with brown scales having a brassy 

 tinge and variegated with pale ones, the latter condensed on the sides and 

 on basal half of dorsal channel of thorax and forming on the elytra a small 

 post-scutellar and numerous smaller subquadrate spots; antennae and legs 

 reddish-brown. Beak scarcely longer than head, widened toward apex, 

 densely and finely punctate. Thorax nearly twice as wide at base as long, 

 dorsal channel entire, widening into a fovea in front; lateral tubercles 

 acute, disc finely and closely punctured. Elytra one-fourth wider at base 

 than thorax, sides broadly rounded, stria? punctured; intervals feebly con- 

 vex, the alternate ones slightly more so. Length 2.3 2.5 mm. 



