HEMIPTEKA— HOMOPTEKA— FULGOEINA, 29.) 



Subfamily DELPHACIDA Stal, 



The only European fossil insect hitherto referred to this group is a 

 species from Aix referred by Curtis to Asiraca, to which seven years later 

 Giebel gave the specific name tertiaria, and Heer that of obscurum, refer- 

 ring it to Cicadellites, one of the Membracida. In America, besides an 

 obscure species referred to Delphax, we have an extraordinary insect, with 

 a very strange type of neuration, from British Columbia. 



DELPHAX Fabricius. 



A single fossil has been referred to this generic group, but only in its 

 wide sense as typical of the subfamily. 



Delphax senilis. 



PI. 5, Fig. 95. 



Delphax senilis Scudd., Bull. U. S. Geol. Geogr. Siirv. Terr., Itl, 760 (1877). 



A fairly preserved specimen with spread wings, but with almost no 

 characteristic sculpture. The head and exposed part of thorax are blackish ; 

 the rest of the body and the wings, especially the tegmina, dusky. The 

 head is less than half as broad as the thorax and short. The thorax is 

 broad and rounded, and the body nearly equal, though enlarging slightly 

 posteriorly. The tegmina are slightly narrower and considerably longer 

 than tlie body, equal, and at the tip broadly rounded ; they show no trace 

 of neuration, but the preservation of the whole is perhaps too obscure to 

 expect it. The wings are a little shorter than the tegmina, crumpled and 

 folded, and show a few longitudinal veins, and others, which, from the 

 nature of the preservation, can not be traced. Legs and appendages of the 

 head are wanting. 



Length of body, 2""" ; tegmina, 2.4"°™. 



White River (probably Chagrin Valley, Colorado; possibly Fossil 

 Canon, Utah). One specimen, W. Denton. 



