WICKHAM: NEW MIOCENE COLEOPTERA FROM FLORISSANT. 431 



Antennae apparently 9-jointed, the basal (visible) joint stouter than the 

 apparent second, the third, fourth, fifth, and sixth subequal but only 

 about half the length of the second. Club 3-jointed, gradually formed. 

 It is possible that the true basal joint is concealed in which case each 

 of those noted above should be moved up one number in the series. 

 Type. R. striata, sp. nov. 



RHAGODERIDEA STRIATA, sp. nov. 

 Plate 1, fig. 7-9. 



Form moderately elongate, subparallel. Head of good size, roughly 

 punctate, not so wide as the prothorax. Eyes not defined. Antennae 

 rather short, reaching only slightly beyond the middle of the prothorax. 

 Pronotum with only one side well preserved, but the length is evidently 

 much less than the width, base and apex apparently subequal, side 

 margin not or scarcely crenulate, a little reflexed, sculpture a rough 

 punctuation similar to that of the head. Elytra about three and one 

 half times as long as the prothorax, each with something more than 

 eight fine but moderately deep punctate striae, the stnal punctures 

 of the same row close together. Interspaces apparently transversely 

 wrinkled, somewhat cancellate near the elytral margins. Legs want 

 ing. Length, 5.60 mm. 



Described from one specimen. 



Type. No. 2,444 M. C. Z. Florissant, Col. (No. 7,001 

 Scudder Coll.). 



While this beetle seems to be a colydiid, it disagrees in important 

 characters with all the genera known to me. It is not at all surpris- 

 ing that insects like the Colydiidae become extinct, since they are 

 highly specialized forms and are frequently very closely adapted to 

 some particular habitat. This one is of large size for the family. 

 It has something the appearance of Rhagodera but is not closely 

 allied in any of the visible characters, even the sculpture being di 

 ent. 



CUCUJIDAE. 



PEDIACUS PERICLITANS Scudder. 



One specimen, No. 2,445 M. C. Z. (No. 8,135 S. H Scudder Coll.) 

 It is like the type figure except that the antennal club is a tr 

 pronounced. 



