156 TERTIARY INSECTS OF NORTB AMERICA. 



The species niav be separated thus : 



Table of the species of InocelUa. 



Central sector of the front wiug (or the sector which traverses tlie middle of the wing above the cu- 

 bital cells) arising from a broken series of transverse veins connecting the radins and 



anal vein 1. /. reterana. 



Central sector of the front wiug arising in the angle of, and bisecting, the basal cell formed by the 

 junction of the radius and its basal branch. 

 Longitudinal row of cells below the radius of equal or subeqiial length. 



Front wing about two and a half times longer than broad ; cells just above the cubital cells 

 no longer than they and sliorter than tho.se in the row just beneath the radius; pro- 

 thorax strongly tapering 2. /. somnolenia. 



Front wing more than three times as long as broad ; cells just above the cubital cells much 

 longer than they and as long as those in the row just beneath the radins; prothorax equal. 



3. /. Iiimnlatu. 

 Longitudinal row of cells next below the radius of very unequal length 4. /. eienia. 



1. Inocellia veterana. 

 PL 14, Fig. 1. 



A single specimen lias been found, in which the two front wings are 

 preserved with an obscure body, lacking the head. This front wing is con- 

 siderably longer than thorax and abdomen together, nearly four times as 

 long as broad, the apical margin well rounded, not at all produced. The 

 venation is distinct, dark castaneous ; the pterostigma is of considerable 

 size, faint castaneous, about four times as long as broad, equal, terminated 

 interiorly by a transverse, exteriorly by a very olilique nervule. The cos- 

 tal margin is straight from the base to the pterostigma with no expansion 

 whatever ; the figure of the right wing on the plate is incorrect in this par- 

 ticular, a faint expanded vein being represented where none exists. The 

 subcostal vein runs parallel with the costal vein in the basal half of the 

 wing, and is connected with it by four or five transverse or oblique veinlets, 

 then suddenly turns upward and joins it at some distance before the ptero- 

 stigma. Tlie radius runs parallel to the costal vein throughout, and is con- 

 nected with the subcostal by two or three transverse veinlets. The sectors, 

 or longitudinal veins of the central portion of the wing, do not arise at 

 intervals obliquely from the radius as they do in the other species, as well 

 as in the amber I eogena and in modern types, but together form a broken 

 transverse veinlet, curving around from beyond the middle of the basal half 

 of the radius to the anal vein and at intervals from the upper sector. It 

 seems, therefore, to form a somewhat distinct group of Inocellia. There 

 are two sectors springing from the first sector, one in the middle, the other 



