SUBFAMILY I. TETRIGINJB. 



163 



granulated, rarely rugose; sides of vertex subparallel, its disc not 

 narrowed opposite the middle of eyes. 



g. Pronotum granulose, its lateral carinse only moderately compressed, 

 its dorsal surface not suddenly strongly narrowed behind the 

 shoulders; oblique ridges of hind femora feeble. 



7f. Body rather slender, the posterior portion of pronotum prolonged, 



acute; vertex distinctly depressed in front; eyes prominent; 



frontal costa feebly sinuate, narrowly silicate. 69. ABEXOSUM. 



nil. Body more robust, the pronotum less prolonged posteriorly (Fig. 



G2.); vertex but little depressed in front; eyes of medium size; 



frontal costa, viewed from the side, distinctly sinuate between 



the eyes. 69a. OBSCUKTJM. 



gg. Pronotum rugose-granulose, its lateral carinse decidedly compressed 



and dorsal surface strongly narrowed behind the shoulders; oblique 



ridges on outer face of hind femora strong. 69b. BLATCHLEYT. 



65. ACRYDIUM GBANULATUM Wm. Kirby, 1837, 251. Granulated Grouse 



Locust. 



Body, especially that of male, very slender. Color variable, usually 

 wholly grayish or reddish-brown, sometimes blackish; pronotum often 

 with a median yellowish band along the full length, rarely with irregular 

 brown or black spots preceded by a white or cream-colored saddle-like 

 marking. Surface of pronotum and legs finely granulated; the dorsal 

 surface of the former also rugose with numerous very short ridges or tu- 

 bercles. Vertex as described in key, its front border considerably ad- 

 vanced in front of eyes; face very oblique; eyes small. Pronotum with 

 front margin truncate, posterior process attenuate, the apex acute, pass- 

 ing the hind femora 2 4.5 mm.; median carina prominent throughout but 

 not crested. Wings reaching to or slightly beyond tip of pronotum; in 

 life bluish or bottle-green in color. Length of body, $, 8.5 13.5; 9, 

 1115.3; of pronotum, $, 811.5, 2, 12 13.5; of hind femora, < , 6, 2, 

 7 mm. (Fig. 60.) 



Lake, Porter, Fulton, Marshall, Marion and Franklin counties, 

 Ind., Feb. 20 Oct. 7; LaSalle Island and South Haven, Mich., 

 June 1 July 29 (W. 8. R.}. Doubtless occurs throughout Indi- 

 ana, but much more abundant in the northern portion, as it 



ranges from Nova Scotia 

 and throughout New 

 England westward to the 

 Pacific and northward 

 through British America, 

 Kirby 's unique type hav- 

 ing been taken in Lat. 



65 degrees. 



It is not re- 

 corded south of New Jer- 



Fig. f,o. Male. X - : pronotum of two color varieties. Se . Y ' 

 (After Kirby.) 



SOlltliern Indiana 



