AMERICAN COLEOPTERA. 51 



the anterior fourth, the declivity not concave transversely, its summit 

 acute and with the usual setas. Clypeal margin broadly rotundate; 

 post-clypeal convexity strong and abrupt, impressed at middle; head 

 moderately densely punctate, becoming sparsely so at the middle of 

 the vertex. Prothorax a little less than twice as wide as long, widest 

 at about the basal two-fifths, sides moderately rounded, not appreciably 

 sinuate before the angles; front angles not prominent, hind angles a 

 little obtuse; disk nearly uniformly moderately closely not coarsely 

 punctate, and with at most a very broad and feeble impression along 

 the basal margin. Elytra barely three times as long and about one- 

 fourth wider than the prothorax, punctuation coarse and rather dense, 

 the three wider intervals confusedly punctured; discal costae evident 

 but rather inconspicuous; intrahumeral impression at base of elytra 

 unusually strong. Body beneath coarsely densely punctate at sides, 

 less closely and more finely so at middle. Upper tooth of front tibia 

 feeble or obsolete, submedian in position. Ungual tooth broad, 

 truncate, nearly as long as the outer portion of the claw. Length 

 8-9.2 mm.; width 4.5-4.9 mm. 



Habitat. — Georgia (type); South Carolina; Florida (Lake 

 City and Marion County). Not common in collections. 



There is no possibility of confusing this species with any 

 except the two following, one or both of which may indeed 

 be only varietal forms of the present. The punctatorugosa of 

 Blanchard is almost certainly one of these, but it is impossible 

 to say which. The strong transverse medially impressed 

 post-clypeal ridge distinguishes them at once. 



39. D. excavata Lee. 



Precisely similar to frontalis, except that the thoracic disk 

 is rather broadly and deeply concave or impressed exteriorly 

 along the basal margin, this impression causing the sides of 

 the prothorax to become sinuate before the basal angles, when 

 viewed from above. This character seems doubtfully suffi- 

 cient for the specific separation of the two forms, and LeConte 

 himself suggested that they might be sexes of the same spe- 

 cies. I do not think the difference can be a sexual one, and 

 I have not yet seen enough material to warrant the placing 

 of the present form as a variety of the preceding. 



More examples of this species have been seen than of the 

 preceding, the following localities being represented: South 

 Carolina; Georgia; Florida; Louisiana (Covington). It is also 

 given in Smith's New Jersey list from Newark and Hopatcong. 



TRANS. AM. ENT. SOC, XXXV. MARCH, 1909. 



