12 _ COXTRIUUTIONS TO CANADIAN I'AL^XJN TOLOGY. 



close to the base, Avith ])vaiK-]ies running close and sub-parallel U) each 

 other. There are five branches of the ulnar vein, terminating above 

 the middle of the apical margin of the tegmina, but below that the 

 veins are wholly obliterated. The sutura clavi must be very brief (as 

 we should, perha])s, expect it to be in a wing with so short a costal 

 areole), since no sign of it appears on the basal patch ; it must ter- 

 minate before the branching of the ulnar vein. The tegmina are of 

 very large size, the costal margin regularly and gently arched, the 

 inner margin almost straight, and the apex very regularly convex, at 

 least on the upper half. 



Length of fragment, 23. 7.5""" ; estimated length of the tegmina, 25"'"' ; 

 breadth in middle, 9.5""". 



Similkameen River. — One specimen. No. 77, Dr. G. M. Dawson, 

 1877. 



Sub-family RICANIINiE. 



It is only in this country that members of this sub-family have been 

 found in the rocks, Hammapteryx, an extinct type, having been found 

 in W3'omiug, and a species temporarily referred to Ricania, occurring 

 in British Columbia. 



RiCANiA Gerinar. 



The species here recorded under this name is given it only provision- 

 ally until more perfect specimens for its better placing are found. 

 The only other fossil before referred here is one recorded by Giebel 

 from amber, which is imperfectly described but agrees with this in the 

 multiplicity of the nervules in the tegmina. 



Ricauia antiqiiata. 



PI. I, iig. 3. 



I place temporarily in this genus a species of Ricaniinje allied to 

 Deraulax which must evidently fall into a distinct group. It is only 

 known, however, from a portion of one of the tegmina. In this the 

 costal field is expanded, much the broadest a little beyond the base 

 and tapering gently, and is filled with numerous transverse more or 

 less oblique simple veinlets. From a break in the stone it cannot be 

 told whether the reticulated membrane near the base of the fragment 

 belongs to the tegmina or the wrings, but the portion beyond is plainly 

 one of the tegmina and shows apparently that the upper radial branch 

 is simple and straight, the lower nearly as straight and sub-]jarallel to 



