46 Journal New York Entomological Society. [Voi. iv. 



D. furvus Dej. — Form short, broad, folor blackish-opaque, or 

 slightly shining. The median thoracic Hne is feeble, the lateral margins 

 slightly reflexed. Elytral intervals alternating, striae smooth. The in- 

 terval between the sixth and seventh stria bears several punctures near ' 

 the base. Length 15 mm. = .60 in. 



Habitat : Ohio, Kentucky, Missouri, Florida. 



D. crenatus Zee. — The district punctuation of the elytral striae 

 will serve to separate this species from its neighbors. I have seen no 

 specimens and am unable to give other differential characters. Length 

 15-16 mm. = .60-. 64 in. 



Habitat : I^ouisiana, Texas ; recorded also from Buffalo, New 

 York. 



D. ovalis Lee. — Black, form short, the median thoracic line very 

 distinct and deeper near base and apex. Elytral striae deep, smooth, 

 intervals not alternating, humeral carina long. Lengih 15-16 mm. = 

 .60-.64 in. 



Habitat : New York, New Jersey, Pennsylvania, Illinois, Mary- 

 land, District of Columbia, Ohio, Texas. 



D, elongatus Bon. — Form more elongate than in the preceding 

 species, thorax with deep and distinct longitudinal median line, two 

 deep setigerous punctures anterior to the middle of the prothorax. 

 Elytra with deep regular striae, intervals convex, not alternating. 

 Length 15-18 mm. ^ .60-. 76 in. 



Habitat : New York, New Jersey, Pennsylvania, Illinois, Indiana, 

 Ohio, Maryland, District of Columbia, Texas, Iowa, Louisiana, Mis- 

 sissippi. 



D. ambiguus Laf. — A large species of black color, either 

 opaque or more or less shining. The sides of the thorax are reflexed 

 behind, the form elongate. Length 20-22 mm. =: .80-.87 in. 



Habitat : New York, Pennsylvania, Illinois, Missouri, District of 

 Columbia, Alabama, Mississippi. 



D. dilatatus Say. — Black, dull, or with a slight surface luster. 

 Form broad, short, sides of thorax hardly reflexed posteriorly ; elytra 

 with broad deep striae which are almost smooth except for traces of 

 punctures near the tip. Length 20-25 '^^^- = .80-1.00 in. 



Habitat : New York, New Jersey, Pennsylvania, Ohio, Maryland, 

 Indiana, Illinois, Missouri, District of Columbia, Virginia, Alabama, 

 Texas. 



