164 



The Ohio Journal of Science [Vol. XX, No. 5, 



Genitalia: Last ventral segment of the female longer than the 

 preceding ones; the posterior border sinuate, notched near the center, 

 leaving a distinct, broad, rounded tooth or lobe on the median line; 

 pygofer broad, short, equaling the ovipositor in length, very sparsely 

 ciliate behind. Male valve very short, rounded behind, the plates- 

 broad at base and with elongate, bluntly acuminate tips, reaching to 

 the tip of the pygofer; the pygofer short, scantily ciliate at the tip. 



35. v\v'\<\vft 



Fig. 7. Deltncephalns viridis, n. sp. a, dorsal view of micropterous female; b, nymph; 

 c, elytron of macropterous form; d, elytron of macropterous form; 

 e, head and pronotum of male;/, face; g, genitalia of male;|/(, genitalia of 

 female. (From drawings by Miss Charlotte M. King.) 



The nymphs are similar in form to the adults and differ 

 from them in lacking wings, the wing pads of what appears to 

 be the mature nymph extending but slightly beyond the borders 

 of the thoracic segments. The eyes are dusky. 



Type No. 22810. U. S. National Museum. 



This interesting member of the genus occurred in consid- 

 erable numbers and in long and short winged forms, and also as 

 larvae in the bottom of the resaca at Brownsville, Texas, living 

 in a dense turf of fine grass, where it evidently spends the year, 

 as the specimens were taken during February, 1910. 



The species is evidently an abundant one, and there can be 

 no question as to the food plant being the abundant grass on 



