1913.] NATURAL SCIENCES OF PHILADELPHIA. 411 



tained about one and four-tenths times in greatest (caudal) dorsal 

 width, narrowing slightly in the cephalic portion. Tegmina nearly 

 as long as the caudal femora, apex of same dorsal in position, distal 

 margin of dorsal field rotundato-rectangulate, longitudinal veins 

 rather conspicuous, cross-veinlets faint. Wings very long, twice as 

 long as tegmina. Supra-anal plate very short and strongly 

 transverse, sharply and suddenly depressed mesad, the caudal 

 margin almost straight but slightly produced mesad, separated 

 by a pronounced transverse fold from the supra-anal plate, which 

 plate is shield-shaped. Cerci long, evenly tapering, thickly 

 covered with hairs. Ovipositor very long, longer than caudal 

 femora, rigid, with a scarcely perceptible arcuation, apex of same 

 very narrowly sublanceolate enlarged with that portion formed by 

 the dorsal valves armed, the upper margin dentate, these teeth 

 regular, heavy, sharply cut, but with their immediate apices blunt. 

 Subgenital plate scoop-shaped, rectangulate-emarginate mesad with 



Fig. 3. — Nemobius fasciatus. Ovipositor. (Greatly magnified.) 



the margins broadly rounded.-^ Caudal femora with greatest 

 (meso-cephalic) width contained about three times in length. 



A male bearing the same data as the female here described affords 

 the additional characters given below. 



Size very slightly smaller, proportions much as in female. The 

 tegmina are translucent and when in repose the dorsal fields are 

 hemi-elliptical in outline. Subgenital plate scoop-shaped, narrowing 

 evenly but considerably caudad. The proximo-internal spine of the 

 caudal tibia specialized as described under Morphological Notes in the 

 generic discussion of the present paper. 



The brachypterous form of the present species differs in having the 

 apex of the female tegmina at the humeral angle, the distal margin 

 of the dorsal field roundly obhque, arcuato-truncate, while the sutural 

 margin passes into the distal margin without angulation. 



2^ In the present species the shape of the subgenital plate of the female varies 

 from the present type to one similar to that of maculatus. 



