. I MERIC. I iV PALEOZOTP INSECTS— HANDLIRSrH. 



679 



iiiiiiti'mal. Subcostu .'ittaiiiiii^" two-thii'ds the Iciii^th of th<> win^' and 

 tluMi uniting' witli the costa. Radius simple, icacliiiij;- to the tip, sepa- 

 rated from the subeosta and fiom the radial sector hy a uniformly 

 wide interspace; the hitter vein originates near the ])ase, and in the 

 jipical half of the wing- sends otf one a-parted and farther out 7 simple 

 or forked hran<'hes, which extend ol)liquely backward. The sim})le 

 anterior branch of the media, continuing- in a long- cui've to the iiuier 

 marg-in, arises al)ove the first third of tlu^ length of the wing, Avhile 

 th(> lower branch furcates many times, so that 15 twigs reach the mar- 

 gin. The superior branch of the cul)itus emerges netir the base and 

 forms a long curve with a dichotomous end; the posterior branch, on 

 the other hand, separates into 5 ])ranchlets. The gi'oup of anal veins 

 consists of 8 to U compound l)i-anches. which advance more o))liquely 

 than in curves to the inner border, and thus present a nearly faidike 

 appearance. Plaiting, however, was not present. The numerous very 

 delicate curved cross veins ai-e undulating or branched, not reticulate. 



POLYCREAGRA ELEGANS, new cpecies. 



LocdJitii. — Cranston, Rhode Island. Pennsyhanian; near ]»ase of 

 section; stage unknown. 



Km;, li. — I'iii,ycrka<;ka klegans. 



This tinely preserved wing has a length of 75 nun. 

 Holotyp<\—C^i. Nos. 3S7(»5, ?.s7o(). I'.S.N.M. 



Family ErBLEPTID^; new family. 



This famil}' is founded on one of the smallest pahi^odictyopteran 

 forms from America, which may be distinguished by its reniarkal)ly 

 ephemerid-like appearance. The four equal wings have a feebly 

 l)ianched venation, which comes very near to the hypothetical type 

 of Comstock and Needham, mentioned a))ove. The head is compara- 

 tively larg-e, with large compound eyes; the l)ody slender, with long- 

 jointed cerci. 



