402 



EEl'OllT 01'' STATE GEOLOGIST. 



positor straight, the apical two-thirds of nearly the same dianu'ter. 

 the tip scarcely upturned; the teeth of inner valve feebly crenate. 



Measurements: Lengtli of body, male, 30 mm., female, 2() mm.; of 

 pronotuni, male, 7.5 mm., female, G.5 mm.; of front femora, male, 

 15 mm., female, 13.5 mm.; of hind femora, male, 2G mm., female, 

 24 mm.; hind lil)i;e, male, 37.5 mm., female, 35 mm.; of antenna-, 

 male. 1(K3 mm., female, 90 mm.; of ovipositor, IG mm. 



Fig. 101. CcuthopJiUus stygius {Scnddcr). Female. One and one-fourth times natural size. 

 The antenna" are half as long again as shown in the cut. (Original.) 



This "cave cricket" occurs abundantly in crevices in the walls 

 and roof near the mouths of Wyandotte, Little Wyandotte, Sibert"s 

 AW'll Cave and Saltpetre Cave, Crawford County, and a few imma- 

 ture specimens, 2)i'onounced by Mr. S. H. Sciidder to be the same 

 species, have been taken in Porter's Cave, Owen County and Truett's 

 and Strong's caves, Monroe County, 80 miles farther north. In the 

 Crawford County caves no specimens were found further back than 

 350 feet from the mouth, except in Wyandotte, where a few have 

 been taken on '^'jMonument Mountain," one-half mile from the 

 mouth. In the otlier 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 30 were' 

 found in a small cranny in the wall, lliey 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 holding a con- 

 ference or cricket convention. 



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

 found a number of specimens of half grown young in Sibcrt's Cave 

 on May IG, 1895. The adults were common in July, 189G; and in 

 Xovember, the young about one-third the size of mature sjjecimens 

 were frequent in Saltpetre Cave, but could not be found elsewhere. 



