224 . TERTIARY INSECTS OF NORTH AMERICA. 



he compares to Q^^dipoda coerulescens, and I have seen an undescribed form 

 from Aix in the hands of M. Oustalet which is apparently allied closely to 

 Chiuiarocephala. Of the Radoboj species described by Heer, 0. nigrofas- 

 ciolata, as stated above, is probably a Scyllina and not an wdipodid. O. 

 melanosticta is perhai)s an Hippiscus, and 0. haidingeri a Dissosteira, or 

 certainly very close to it. Of the Oeningen species which Heer describes, 

 O. fisclierl looks somewhat like a Chimarocephala, and 0.' germari (not 

 described) is said by Heer to belong near Pachytylus. O. oeningensis is 

 too obscure to say that it belongs in this family. The larger part of the 

 European species would therefore seem to have decided American affinities, 

 Chimarocephala, Dissosteira, and Hippiscus being distinctively American. 



Of the American species, one is referred to (Edipoda only in a general 

 sense ; the two others belong to new genera, one near the end, the other 

 next the end of the series, in the vicinity of Chimarocephala and Encopto- 

 lophus, American genera. 



The family finds its greatest development in the north temperate • 

 regions of the world, and is remarkably abundant in forms in North Amer- 

 ica, and particularly in the warmer and more arid parts of the United 

 States. (July, 1884.) 



NANTHACIA gen. nov. (Nanthace + grasshopper, Otoe). 



This nauie is proposed for a genus of CEdipodidaj which is allied to 

 Encoptolophus, but in which the upper ulnar vein of the preanal area of 

 the hind wings does not extend nearly to the margin of the wing but ter- 

 minates before the middle, as it does in the tegmina, in a fork which extends 

 above to the radial and below to the lower ulnar vein. 



Nanthacia torpida. 



A single specimen of this has been recovered, showing a hind wing 

 only, in which the anal area is closed and the preanal almost fully exposed. 

 The principal radial vein runs in close proximity to the costal margin, and 

 it is connected Avith the veins above by very short cross-veins, and near the 

 tip of the wing by a stigma, as in Encoptolophus. It has two principal ob- 

 lique foi-ks, tlie irmer arising only a little within the middle of the wing and 

 terminating on the ulnar a little before the outer margin, the other arising 

 rather less than a third of the way from the former to the apex and ter- 



