296 MEMOIRS ON THE COLEOPTERA 



Form elongate-suboval though more parallel than in oculatus, the an- 

 terior parts relatively larger; coloration as in comma; head and eyes 

 nearly as in the preceding; antennae darker, stout, blackish, the two 

 basal joints pale, extending but little behind the thoracic base; 

 prothorax nearly as in comma throughout, fully two-fifths wider than 

 long, the basal angles rather broadly rounded; surface similar, pale 

 rufo-testaceous, the central darker marking very nubilous and in- 

 definite in the types; elytra much longer than in oculatus, nearly three- 

 fifths longer than wide, parallel, with feebly arcuate sides and cir- 

 cularly rounded apex, less than a fourth wider than the prothorax, 

 the sinus wholly obsolete; striae impressed, the scutellar long and 

 rather deep, parallel; intervals only very moderately convex, the 

 puncture similar; hind tarsi very slender though feebly tapering 

 from base to tip as usual, the fifth joint shorter than the first two, the 

 third distinctly elongate. Length (cf 9 ) 54-5-9 mm.; width 1.8- 

 2.0 mm. Two examples without label in the Levette collection but 

 probably taken in Indiana, also one example from New York. 



gracilitarsis n. sp. 



14 Body rather large in size, somewhat as in comma and similar through- 

 out in coloration; head black, three-fourths as wide as the prothorax, 

 with the usual prominent eyes; antennae stout, infuscate, paler 

 basally, short, scarcely extending to the thoracic base; prothorax 

 subquadrate, not a fourth wider than long, the sides broadly arcuate, 

 a little less so basally, widest just before the middle; apex sinuato- 

 truncate, with obtuse but rather distinct angles and equal in width 

 to the feebly arcuate base, the basal angles very broadly rounded; 

 surface feebly convex, with evident anterior transverse impression 

 and a fine stria from the impression nearly to the base, the latero- 

 basal region coarsely, closely and conspicuously punctured to the 

 sides, the punctures extending through the median region but only 

 near the base, the foveae large, very feeble and vague; elytra as in 

 comma, fully two-fifths wider than the prothorax, the scutellar stria 

 long, deep and parallel; hind tarsi pale, moderately slender, of the 

 usual structure, the third joint distinctly longer than wide. Length 

 (cf) 7-8 mm.; width 2.8 mm. Oklahoma. One specimen. 



quadricollis n. sp. 



15 Basal angles of the prothorax broadly rounded as in comma 16 



Basal angles rounded but much more narrowly than in 16 18 



16 Body parallel in outline, the prothorax but little narrower than the 

 elytra. Coloration nearly as in comma throughout; head moderate, 

 not quite three-fourths as wide as the prothorax, with prominent 

 eyes and a feeble punctiform impression at the middle of the vertex 

 in the type; antennae moderately stout; prothorax large, more than a 

 third wider than long, the outline nearly as in comma; surface with 

 some fine obsolescent transverse wavy wrinkles, coarsely, deeply and 

 rather closely punctate toward base from side to side, the entire 

 basal region somewhat depressed, the foveae not defined, obsolete; 

 anterior transverse impression very feeble, the stria extremely fine; 

 elytra parallel, with feebly arcuate sides and subcircularly rounded 

 apex, nearly three-fifths longer than wide and barely a fourth wider 



