WICKHAM: NEW MIOCENE COLEOPTERA FROM FLORISSANT. 471 



No. 2,614 M. C. Z. (No. 3,375 S. H. Scudder Coll.) as representing the 

 same species, although the punctuation is less pronounced. 



With some hesitation, I have separated this from L. evanescens on 

 account of the much stronger punctuation of the present bisect. 

 This is particularly noticeable towards the elytral apices since in 

 L. evanescens the strial rows are scarcely visible beyond the middle 

 while in L. fortior they continue distinct to near the tip. 



CRIOCERIDEA DUBIA Wickham. 



Not uncommon. Represented by good specimens, No. 2,615-2,619 

 M. C. Z. (No. 7,977, 9,577, 11,242, 4,458 and 11,737 S. H. Scudder 

 Coll.). Poorer examples, No. 2,620-2,623 M. C. Z. (No. 438, 8,644, 

 3,110, 11,791 S. H. Scudder Coll.) probably belong here. 



COLASPIS DILUVIALIS, Sp. nOV. 



Plate 11, fig. 1. 



Form rather elongate. Head too much damaged to show the sha^e. 

 Antennae incomplete but displaying several of the proximal joints 

 hich are slender though somewhat thicker than in recent species, 

 'rothorax poorly defined, flanks beneath moderately coarsely and quite 

 losely though not very deeply punctured. Meso- and metathorax 

 nore finely punctate and transversely or obliquely subrugose beneath, 

 llytra showing only a portion of one side upon which the sculpture is 

 isplayed in the form of nearly regular striae of circular or slightly 

 ransversely elliptical deep punctures, those of the same row separated 

 y spaces usually much less than the diameters of the punctures. The 

 culpture is much finer towards the apex, and, on account of poor 

 reservation, is nearly effaced near the base. Abdomen nearly smooth 

 ut showing traces of shallow punctuation. Legs wanting. Length, 

 rom front of head to abdominal apex, 4.50 mm. 

 Described from one specimen. 



Type. No. 2,626 M. C. Z. Florissant, Col. (No. 6,872 S. H. 

 cudder Coll.). 



Most likely this insect is not a true Colaspis though it may be re- 

 ived in that genus in its broad interpretation. It is more like Rhab- 



