COLEOPTERA. 153 



Humeral angles of elytra not prominent ; seventh segment of the 

 abdomen J broadly rounded behind to the immediate vertex, 



which is somewhat angulate 24. trajectus. 



Humeral angles of elytra very prominent ; seventh segment 9 

 abruptly and obtusely truncate behind, truncation in the 

 form of a very broad triangle, angle at the immediate vertex 



obtuse, but not at all rounded 25. j»a(»auoiiis. 



Smaller species, not exceeding 3.4 mm. in length. 

 Legs not black. 



Very slender species. 



Elytral punctuation fine, close ; legs very dark brownish-fuscous. 



26*. obsolettis. 

 Elytral punctuation coarse, rather more sparse, legs pale piceous- 

 brown. 

 Anterior margin of the prothorax much shorter than the poste- 

 rior 27. artus. 



Anterior and posterior margins nearly equal in length. 



Interocular surface nearly twice as wide as the eye ; larger 



species; Louisiana 28. dilutlis. 



Interocular surface but one-third wider than the eye ; very 



small species. Florida 29. meiidioitalis. 



Species more robust. 



Legs pale fiavo-testaceous, variegated with dark castaneons. 



Third joint of maxillary palpi very long, rather slender, flavate ; 



femora having the distal tips darker 30. caQlosiis. 



Third joint of maxillary palpi shorter, very slender at base, 

 strongly and somewhat abruptly clavate, pale piceo-testaceous 



above; femora darker in their distal half 31. varipes. 



Legs dark fuscous in color throughout. 

 Prothorax distinctly longer than wide. 



Elytral punctuation very coarse 32. arcillllS. 



Elytral punctuation fine and close. 



Sides of elytra moderately convergent near the humeri ; 

 sides of prothorax nearly straight behind : punctuation 



finer and closer 33. puuctatllS. 



Sides of elytra nearly parallel toward the humeri ; humeral 

 angles more prominent ; elytral punctuation coarser and 

 more distant ; prothorax distinctly sinuate toward the 

 basal angles, rather prominently angulate just behind 



the middle 34. dissentiens. 



Prothorax as wide as long 35. Ilubbardi. 



Legs black or extremely nearly so. 

 m Punctures of the pronotum extremely large, deep, and sparse. 

 Pacific Coast. 



Head as wide as the elytra at base 36. laetullIS. 



Head very small, much narrower than the elytra ; elytral punc- 

 tuation slightly finer and more regular 37. leviceps. 



Pronotal punctures small, close, and nearly evenly distributed. 



