INSECTS FROM MIOCENE OF FLORISSANT, COLORADO 717 



margin; three veins running from "third cubital" to hind margin; 

 eleven forked veins on hind margin, the first at the tip of the radial 

 sector, at apex of wing; eight simple veins from Cui to hind margin 

 before the first forked one, and one simple vein between the second 

 and third forks. 



Miocene shales of Florissant, Wilson Ranch (H. F. Wickham). 

 Nearest to P. vetuscula (Scudder), which agrees in having the radial 

 sector originating far basad; but the " third cubital " cell is different. 



Palaeochrysa wickhami n.sp. 



Anterior wing about 9 mm. long; hyaline, with dark venation; 

 radial sector originating scarcely basad of lower basal corner of 

 "third cubital" cell; costal area with 

 eight cross-veins visible, but at least 10 • 

 were present; 9 or 10 cells between 

 radius and sector, the middle ones about 

 square (their shape entirely different 

 from those of P.fracta), the basal one 

 long; between Rs and M are seven 

 oblique cells and a basal one of irregular 

 shape (above the "third cubital"); be- 

 tween media and cubitus are nine cells; 



, ^ 1 -i . 1 • 1 Fig. 3. — Palaeochrysa wick- 



SIX sunple nervures from cubitus to hmd ^^^^^ .^i^j^^ ^^^^^^^„ ^^^ 



margin before the forked ones begin; 



"third cubital" divided straight across the middle, neither part 



much produced basally or apically; one nervure from near middle 



of "third cubital" to margin, and one meeting the nervure which 



bounds its outer side. The basal part of cubitus is straight, and the 



media is not dislocated. 



Miocene shales of Florissant, Wilson Ranch (H. F. Wickham). 



Remarkable for the small size and dark nervures; it might be a 



Nothochrysa, except for the forked veins going to hind margin. It 



differs from P. vetuscula not only in the much smaller size, but also 



in not having Rs originating far basad of the double cell, and also in 



having only one nervure from double cell to margin. In this last 



character, and also in the shape of lower part of double cell, it differs 



from P. ferruginea and P. concinnula. 



