No. 2313. NEW SPECIES OF EOCENE INSECTS— COCKERELL. 237 



Mg than to M^, but cells between Mg and M^ are not doubled in this 

 region. Other parts of wing unknown. 



Type. — ProtampM'pieryx hasalis, new species. 



PEOTAMPHIPTERYX BASALIS, new species. 



Plate 32, fig. 3. 



Wings hyaline, vrith dark veins; base of wing to nodus 9 mm.; 

 nodus to twenty-first post nodal, 13 mm.; base to arculus 3 mm.; 

 arculus to origin of Ms 1.7 mm.; nodus to separation of Mj, 3.3 mm.; 

 first antenodal from base of wing 2.5 mm. 



Type. — ^U.S.G.S., 812 and reverse, 755. Green River, Wyoming. 

 (Scudder collection.) 



Holotype.—C&t. No. 66550, U.S.N.M. 



I hesitated at first, whether to place this in the South American 

 genus AmqMpteryx, but it may be separated by its remarkably basal 

 arculus; the smaller number of antenodals, with only two continued 

 across the subcostal space; and the much shorter cells between Mg 

 and M^ at a level a little beyond the nodus, these cells being in fact 

 higher than wide. It is unfortunate that the stigma is unknov/n. 



Family COENAGRIONIDAE (AGRIONIDAE). 



EOPODAGRION, new gerras. 



Rather small dragon flies related to Megajiodagrion, but having a 

 very oblique brace vein at the lower basal end of stigma; subnodus 

 almost vertical; subquadrangle not so long and narrow, and the cell 

 below it extending considerably basad of its basal end. Eleven 

 cross nervures in costal region between nodus and stigma; stigma on 

 lower side bounding two cells. 



TyiJe. — Eopodagrion scudderi, new species. 



EOPODAGRION SCUDDERI, new species. 



Plate 32, fig. 4. 



Wing about 23 mm. long; hyaline, with fuscous nervures, the 

 stigma dilute fuscous. Base to nodus about 8 mm.; stigma to nodus 

 nearly 12 mm.; all the costal cells betv/een stigma and nodus are 

 conspicuously broader than long; antenodal cross nervures not well 

 preserved, but I am confident that there are only two. The following 

 measurements are in microns: vStigma on costa, 1,280; stigma on 

 lower side, 1,200; basal side of stigma, 560; length of fifth costal cell 

 beyond nodus, 1,040; lower side of subquadrangle, 1,330; basal side of 

 subquadrangle, 290; lower apical face of subquadrangle, 175; origin 

 of M3 basad of subnodus, 1,200. The quadrangle is not preserved. 



