WICKHAM: FOSSIL ELATERIDAE OF FLORISSANT. 513 



AGRIOTES NEARCTICUS, sp. nov. 

 Plate 4, fig. 6. 



Form elongate. Head minutely but very closely and distinctly 

 punctured. Antennae poorly preserved, but what remains of one 

 of them indicates that they were short and slender, scarcely serrate. 

 Prothorax broken along the side margins, obscuring the shape, punc- 

 tuation almost exactly like that of the head, the punctures finely 

 mamillate, nearly touching, even on the middle of the disk. Elytra 

 relatively rather elongate as compared with their width, striae appar- 

 ently very shallow but their rows of punctures are fairly deep and 

 strong, each puncture somewhat elongate, those in each series sepa- 

 rated by a little more or less than their own long diameters. Inter- 

 stitial spaces scarcely perceptibly punctulate, but with marks of a 

 fine, moderately short pubescence. Length, from front of head to 

 elytral apex, 8.00 mm. ; of elytron, 5.50 mm. 



Described from one specimen. 



Type No. 2,748 M. C. Z. Florissant, Colo. (No. 6,653 S. H. 

 Scudder Coll.). 



While resembling the Florissant fossils, Limonius florissantensis and 

 L. praecursor, this insect is more elongate and more delicately punc- 

 tured than the former and differs from the second in the closer punctu- 

 ation of the head and prothorax as well as the almost complete lack of 

 it in the elytral interspaces. The coxal plates are not very clearly 

 shown, but I think they are correctly exhibited in the drawing. The 

 front seems to be higher than the labrum, as indicated by the distinct 

 line of demarcation in the fossil, and the slender antennae are like 

 those of Agriotes. 



AGRIOTES COMMINUTUS, sp. nov. 

 Plate 4, fig. 4, 5. 



Form rather elongate. Head coarsely, closely but not very deeply 

 punctured. Eyes and antennae not defined. Prothorax with the 

 margins badly broken, so that the exact shape is not discernible, but 

 it was evidently only a little wider than long, with a large discal 

 dark spot, similar to that of the recent North American A.fucosus, sur- 

 face sculpture obscure, the prosternal sutures, which show through, 



