140 Wickhain — Fossil Beetles from the Sangamon Peat. 



Fig. 1. 



tions is finer. Between all these raised sculpturings, the sur- 

 face is roughened similarly to that of recent specimens but a 

 little more coarsely. 



The separation of this variety is based upon the rougher 

 surface and par cularly upon the breaking up of the carina. 

 This character, in itself, is of small import- 

 ance and does not indicate any radical change 

 since the fossil was laid down in the Sanga- 

 mon stage. To-day, Carahus mceander oc- 

 curs in the north, from Maine and Labrador 

 to Manitoba, south through the Rocky 

 Mountains to Colorado a-nd, probably as a 

 relict from one of the interglacial stages, in 

 the Chicago district of Illinois. Specimeus 

 from all of these places have been compared 

 directly with the fossil. Several species of 

 Carabus, part of them presumed to be identi- 

 cal with recent forms, others believed to rep- 

 resent extinct varieties or species, have been 

 described from the Pleistocene deposits of 

 Switzerland, Belgium and Galicia, one of 

 which, C. inceandroides Lomnicki, from the 

 last named locality, probably closely resem- 

 bles the one above characterized. 



Patrobus henshawi new species. 



A single piece of peat carries the head, prothoracic epister- 

 num, pronotum and elytron, the last broken off behind the 

 middle. Color black, shining. Head minutely punctulate (as 

 viewed under a 9x hand lens), posterior transverse impression 

 deep, roughened a little at bottom, frontal grooves strong, 

 rugose and punctulate, the intervening convexity somewhat 

 wrinkled transversely. Pronotum not very well preserved, the 

 front portion being broken off. The disk is apparently very 

 finely and sparsely punctulate, the median groove strong, wide 

 and deep behind (as in the recent P. septentrionis), but fine at 

 middle, a trifle stronger again anteriorly, basal foveas mod- 

 erately deep (less so than in P. septentrionis)., strongly, closely 

 and confluently punctured, connected by a punctate flattened 

 area across the pronotal base. Prothoracic episternum quite 

 strongly and closely but irregularly punctured anteriorly and 

 posteriorly, the smoother submedian area less marked than in 

 any of the four modern species of this genus {P. aterriraics^ P. 

 lo7igicornis^ P. sejptentrionis and P. GaliforniGus\ with which I 

 have been able to compare it. In general, the punctuation of 

 this sclerite is rougher in appearance than in the recent form 



