WICKHAM: NEW MIOCENE COLEOPTERA FROM FLORISSANT. 473 



DlABROTICA BOWDITCHIANA, Sp. nov. 



Plate 11, fig. 4. 



Form moderately elongate, broader posteriorly. Head, inclusive 

 of jaws, about as long as the pronotum but not equalling it in breadth. 

 Syes rather large, rounded, very black and strongly outlined in the 

 specimen, the remainder of the head being pale. Antennae slender, 

 so far as shown, but only their basal portions are preserved. Prono- 

 tum about one and one half times as broad as long, sides weakly 

 rounded, apex and base subequal. Elytra a little more than four 

 times as long as the pronotum, finely punctate but with no signs of 

 itriae. Legs wanting. Length, 7 mm. 



Described from one specimen. 



Type. No. 2,600 M. C. Z. Florissant, Col. (No. 3,467 S. H. 

 scudder Coll.). 



The form was evidently not unlike that of the recent D. 12-punctata, 

 hough probably more slender. What remains of the elytral sculpture 

 ndicates a type more like that of Trirhabda than of any of the North 

 \merican species of Diabrotica known to me though possibly it may be 

 jaralleled in some of the numerous South American representatives of 

 he latter genus to which I have not access. The marmorate appear- 

 ince seems due to the mode of preservation and not to the presence of 

 iny definite pattern. The prothorax is pale like the head. The 

 (resent species is considerably larger than the Florissant fossil D. 

 xcsa. 



It is named for Mr. Frederick C. Bowditch of Brookline, Massa- 

 husetts. 



DIABROTICA UTEANA, sp. nov. 

 Plate 11, fig. 5. 



Form similar to that of D. bowditchiana but a little more robust, 

 -lead rather large, antennae shorter and stouter than in most of the 

 ecent North American species. Pronotum damaged on one side, the 

 >ther appears to be but slightly arcuate, the base broader th?n the 

 pex. Elytra four and one half times as long as the pronotum, punc- 

 uation not distinct, but with some signs of striation near the outer 

 nargin. Legs wanting. Length, 4.35 mm. 



Described from a single specimen. 



