PLEISTOCENE BEETLES OF FORT EIVER, 743 



DytiscidfB and one of the two species of Cbiysomelida?. This is rather 

 smi^risiug, but is what has been found to some degree in American Pleisto- 

 cene deposits, the insects of which appear to show less close relations to 

 their successors on the spot than is commonly the case in Europe, and in 

 consequence relatively little lig-ht can be shed upon the climatic conditions 

 of the time by their remains. In the present case the information is 

 meager and gives no certain clue. The existing species most nearly allied 

 to the Pleistocene Cymindis (Carabidas) occurs from Massachusetts to 

 Florida, and is more common in the South than in the North; our single 

 species of Matus (Dytiscidse) is found in Canada and in the Northern States 

 from Massachusetts to Iowa, but also in Missom'i and Florida;^ Corymhites 

 (Bthiops (ElateridiB) occurs from Massachusetts to Pennsylvania and Ohio; 

 the Donacia (Chrysomelidaj) most nearly allied to the fossil species 

 described below appears to be one known from the Pleistocene of Italy; 

 while the species of Saxinis (Chrysomelidse) most closely related to the 

 Pleistocene form here figured is a northwestern species, coming- from 

 Vancouver, Oregon, and California, and also from Utah, Colorado, and 

 Wyoming. It is plain, then, that a considerably larger assemblage of 

 forms must be obtained to give any evidence of value. The following are 

 the species found: 



Family CARABID^. 



Cymindis extorpescens. 



PI. XXIII, tig. 1. 



A single elytron, representing a species about as lai-ge as C. cribricoUis 

 Dej., but more nearly allied to C. elegans Lee. in the reduction of the inter- 

 stitial punctures to a single row, seems to be entirely distinct from any of 

 our species of that genus in the reduction of the striae to a sei'ies of short 

 longitudinal dashes separated from one another by their own length, while 

 the interstitial punctures are more lightly impressed, arranged in single 

 straight rows, and separated by twice their own length. The elytron is 

 piceous, with a very faint bluish reflection. 



Length of elytron, 6.35 "'"; width, 2.5""". 



'For information on the distribution of American Coleoptera I always rely upon the ready and 

 efficient aid of my friend, Mr. Samuel Henshaw, of Cambridge. 



