634 FAMILY VII. TETTIGONIIDJE. THE CAMEL CRICKETS. 



302. CEUTHOPHILUS STYGIUS (Scudder), 1861, 9. Cave Camel-cricket. 



Form and size of gracilipes. General color the same, though averag- 

 ing somewhat paler. Antennae longer, in the males often four times or 

 more the length of body. Fore femora from three-fourths to nearly double 

 the length of pronotum. Spines on outer carina of hind femora smaller 

 and more even in size than in typical gracilipes, ranging from 15 to 20 in 

 number. Hind tibiae straight, never with the slight basal sinuation usu- 

 ally seen in the larger males of gracilipes. Teeth of inner valves 

 of ovipositor much more slender with sharper tips; terminal hook longer, 

 more decurved. Ninth dorsal of male much less prolonged backward and 

 upward than in gracilipes; subgenital with apex of lobes broadly rounded. 

 The measurements of the larger adult specimens taken in Indiana average 

 about as follows: Length of body, $ , 30, $,26; of antennae, $, 103, 9, 

 96; of pronotum, $, 7.5, 9, 6.5; of front femora, $, 15, 9, 12.5; of hind 

 femora, $ , 26, 9, 24; of hind tibia?, $, 27.5, 9, 25; of ovipositor, 16 mm. 

 (Fig. 210.) 



Fig. 210. Female. X J-3- The antenna 1 are nearly twice as long 

 again as shown in cut. (Original.) 



In Indiana this "cave cricket" occurs abundantly in crevices 

 in the walls and roof near the mouths of Wyandotte, Little Wyan- 

 dotte, Sibert's Well Cave and Saltpetre Cave, Crawford County, 

 and a few immature specimens have been taken in Porter's Cave, 

 Owen County and Truett's and Strong's caves, Monroe County, 

 SO miles farther north. In the Crawford County caves no speci- 

 mens were found further back than 250 feet from the mouth, ex- 

 cept in Wyaudotte, where a few were taken on "Monument 

 Mountain/' one-half mile from the mouth. In the other caves 

 they were found back beyond the reach of any rays of light. 



The adults of this species are the largest stone or camel 

 crickets occurring in the State and seem to be more or less gregar- 

 ious. In one instance, in Sibert's Well Cave, more than 20 were 

 found in a small cranny in the wall. They were grouped in a 

 circle, in a space about six inches square, with their antenna 

 pointing toward the center of the circle, and appeared to be hold- 

 ing a conference or cricket convention. 



In regard to the life history of this insect, but little is known. 



