WICKHAM: new MIOCENE COLEOPTERA from FLORISSANT. 441 



exclusive of the extruded sex organ, 9.20 mm.; of the elytra, about 

 6.50 mm. Width of prothorax, 3.25 mm. 



Described from one specimen. 



Type.— No. 2,483 M. C. Z. Florissant, Col. (No. 6,898 S. H. 

 Scudder Coll.). 



Very much smaller than the Florissant fossil C. haydeni and wath 

 relatively shorter elytra than C. gahani. I think there is no doiibt of 

 its being a true Chrysobothris, but am unable to suggest its affinities 

 with any of the numerous living North American species. 



Chrysobothris coloradensis, sp. nov. 

 Plate 3, fig. 5. 



Form stout. Head wanting. Pronotum not in very good condi- 

 tion but apparently broadest near the base, finely and rather closely 

 but not deeply pimctate, without the reticulate effect of Anthaxia. 

 Elytra bluntly pointed at apex, outer edges not serrate, punctuation 

 fine and quite sparse though not well preserved- Front femur moder- 

 ately stout, not visibly toothed, tibia, though broken at tip, evidently 

 a little curved. Middle tibia distinctly arcuate, the tarsal joints 

 longer than normal in recent Chrysobothris but their articulations are 

 not certainly definable. Length, from front margin of prothorax to 

 elytral apex, 4.75 mm. 



Described from one specimen. 



Type.— No. 2,484 M. C. Z. Florissant, Col. (No. 3,733 S. H. Scud- 

 der Coll.). 



Evidently a buprestid and probably a Chrj'sobothris with the facies 

 of the recent C. atrifasciata or C. ulkei. It is small for the genus but 

 se\'eral of the recent species are of practically the same size. 



Ptosima silvatica, sp. nov. 

 Plate 3, fig. 6. 



Form not very elongate. Head damaged so as not to exhibit its 

 true shape. Prothorax very short, base bisinuate, punctuation fine 

 and sparse on the disk, stronger and crowded on the sides, ever^^vhere 

 shallow. Elytra broken at apex, finely and regularly striatopunctate, 

 the striae impressed, strial punctures elliptical or elongate, well sepa- 



