388 KIM'OHT OF STATK GEOLOGIST. 



Mississippi River." Its song is much more faint than that of vulgare, 

 the z-e-e-e-e being nnicli h-ss ])ro]onge(l. 



lOf). Orchelimum indianense Blatchley. 



Orchdimum iwllminixc Bl., 10, XXV, 1893, 90; Id., 7, 1893, 137; 

 Scudd., 188, 1900, 73; Mc-Neill, 90, XXXII, 19(M), 79, 82. 



A sli-ndc!' bodied insect, with a dark median streak down the face, 

 and having tin- posterior femora unarmed beneath. The cone of the 

 vertex is short, rather narrow, with a rounded apex. The tegmina, 

 narrow, tapering, a little shorter than the wings, and of a delicate, 

 almost gauze-like texture. I'osterior femora slender, shorter than 

 the closed tegmina. Anal cerci of male of medium size, longer than 



Fig. 97. Orchelimum itiilniiense HI. Female. One and one-half times natural size. 



(Original.) 



the sub-genital plate, tapering to a dull point; the basal tooth short, 

 with a broad base and a very sharp point. Tlie ovipositor of female 

 of less than average width and length, the apical half with a gentle 

 npward curve. 



Color: Tegmina and wings a transparent wliitish tinged with 

 green on the front or lower longitudinal nerves; the cross-nervules 

 of the latter darker. Sides of pronotum and abdomen, and all the 

 femora, light green; the tibifB and tarsi of a brownish hue. Face 

 yellowish white, with a dark reddish brown stripe the width of the 

 labrum, starting with the mouth and passing upward to the vertex, 

 where it narrows to the width of that organ; then, broadening on the 

 occiput, it passes back to the front border of the pronotum, where 

 it divides into two narrow streaks, wliich enclose a whitish area and 

 extend a little beyond the posterior transverse suture, where they 

 taper to an end. Sub-genital plate of male yellow. Basal third of 

 ovipositor dark brown, the remainder light reddish brown. 



Measurements: Length of body, male, 17 mm., female, 17.5 mm.; 

 of pronotum, male and fenuile. 1 mm.; of tegmina, male, 21 mm., 

 female, 19 mm.; of hind femora, male, 11 mm., female. I-")..") mm.; 

 of ovipositor. 7.o mm. 



