448 NORTH AMERICAN INDEX FOSSILS. 



the Miocenic of Greenland (Hydrophilites naujatensis Heer), and 

 the Pleistocenic beds of Scarboro Heights, Ontario (Hydrochus 

 amictus Scudder, and Cymbiodyta extincta Scudder). 



The division Adephaga finally has American representatives of 

 the family Carabidce or running beetles. In the Oligocenic beds of 

 Florissant, Colorado, there are more than thirty species (Noma- 

 letus serus Scudder, Myas rigef actus Scudder, Amara powelli Scud- 

 der, etc.) ; the Green River beds of Wyoming and the White River 

 beds of Colorado and Utah have several species (Bembidium exo- 

 letum Scudder, Platynus, two species) ; the Tertiary of British 

 Columbia has its species (Nebria paleomelas Scudder) and so has 

 the Miocenic of Greenland (Carabites feildenianus Heer). The 

 Pleistocenic and interglacial beds of Scarboro Heights, Ontario, 

 have a number of species (Bembidium fragmentum Scudder, B. 

 glaciatum Scudder, and six other species, Loricera(?) lutosa Scud- 

 der, L. glacialis Scudder, L. exita Scudder, Loxandrus gelidus 

 (interglacial), Platynus, eleven species, Pterostichus, eight species, 

 Patrobiis, three species), and the Post-Pliocenic cave deposits of 

 Port Kennedy, Pennsylvania, have a number of species (Chlaenius 

 punctulatus Horn, Cymindis aurora Horn, Diccelus, two species, 

 Pterostichus, two species, Cychrus, two species). 



Order HYMENOPTERA Linn^us. 

 (Ants, bees, wasps.) 

 With thin, membranous, sparsely and distantly veined fore wings, 

 which are larger than the hind pair; C marginal, moderately de- 

 veloped and short ; Sc simple, R strong, with Rs splitting off about 

 the middle; M reduced, included in basal part of i^; Cu well de- 

 veloped, divided into two branches; anal area defined by furrow 

 with, at the most, only two veins ; cross-veins few ; cells large ; 

 hind wings with veining more reduced ; anal region somewhat 

 larger; reduction of veins frequent; both wings sometimes reduced 

 or even wanting; prothorax well developed, pronotum fused with 

 large mesothorax ; mouth parts adapted for biting and licking ; legs 

 mostly for running. This order goes back to the Lias, but is best 

 represented in the Tertiary. American examples are most abun- 

 dantly obtained from the Oligocenic *' lake beds " of Florissant, 



