472 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



different localities, so their peculiarities are not likely to be due to 

 any particular ecological conditions. It is probable that the material 

 collected is fairly representative of the fauna, but it is very desirable 

 to obtain a larger series of species. Should species of any of the miss- 

 ing orders be detected in new collections, they would be of extreme 

 interest and value. 



ORTHOPTERA. 



EOSPILOPTERONIDAE, new f amUy. 



EOSPILOPTERON, ne^w genus. 



Anterior wing broad; costa straight, not elevated; apex rounded 

 and obtuse; subcosta not far from margin, with very oblique cross- 

 veins in the costal cell; radius giving off the sector at about the end 

 of the basal third of the wing, and shortly after that branched, and 

 the lower division again branched, the radius thus ending as three 

 nearly parallel veins, which enter the margin well before the apex; 

 radial sector emitting five very oblique simple branches below; 

 media forked a short distance before the level of the origin of radial 

 sector, with the upper division again forked at level of origin of sector 

 or slightly beyond; cubitus apparently simple; anal region not 

 clearly made out. The longitudinal veins are every^vhere connected 

 by delicate vertical cross veins. 



There is a general resemblance to Zalmonites, Zalmona, and Pseudo- 

 humbertiella, but the radius is quite distinctive. A new family seems 

 to be indicated. 



Genotype. — Eospilopteron omatum, new species. 



EOSPILOPTERON ORNATUM, new species. 



Plate 60, fig. 2. 



Anterior wing about 35 mm. long and 9.5 broad; upper apical field 

 (in region of radius and sector) with a large round brown spot, about 

 3.5 mm. diameter; apical field beyond, above, and below the large 

 spot with scattered small spots, forming a rather obscure mottUng. 



Lias (Brodie). Lacoe Coll. 3488. The precise locality is unfor- 

 timately unknown. 



Holotype.— Cat. No. 61388, U.S.N.M. 



ELCANA LIASINA (Giebel). 

 Plate GO, fig. 1. 



English Lias, "Insect Beds" (Brodie). Lacoe Coll. 3490, 3491, 

 3493, 3494, 3495, the last also marked " Osborn's Pit, July, 1856." I 

 give a figure of part of the wing of the best preserved one (3490), 

 showing several details not before made known. This wing is about 

 11.75 mm. long; 3495 is a little over 13 mm. I am unable to recog- 



