CHILOGNATHA— CHORDEUMID^. 57 



granular appearance. Thisjloosening up of the soil has been observed 

 where the earth had previously ibeen quite smooth and hard on the 

 surface. 



This myriapod seems to breed at all seasons. It has been found 

 copulating a number of times. This has been observed only in the 

 neighborhood of decaying organic matter, and raises the question whether 

 abundance of food influences its breeding. Very young ones appear at 

 all seasons. 



This is the only cave myriapod known from the region north of the 

 East Fork of White River, except Scytonotus cavernarum Bollman from 

 Mayfield's Cave, of which only the type is known. C. bollmani shows 

 no modifications due to cave life. Its eyes are well developed. 



I have specimens of C. bollmani from Mayfield's, Truett's, Twin, and 

 other Mitchell caves, in all of which it is common. 



Another species of this family, Pseudotremia cavernarum Cope, is 

 abundant in Wyandotte and other caves near; Scoterpes copei (Packard) 

 inhabits Mammoth and neighboring caves; while a third, Zygonopus 

 whitei Ryder, lives in caves of Virginia. 



In European caves live 4 species of Attractosoma, 2 species of Cras- 

 pedosoma, and 1 other species. The Chordeumidse is the most important 

 family of true cave myriapods (cf . Packard, 1888, 60-64) . 



Family POLYDESMIDAE. 

 Euryurus erythropygus (Brandt). 

 Bollman, Proc. U. S. Nat. Mus., xi, 1888, 407. 



Found three times within the cave between "10" and " 17. " It was 

 also found in a sink-hole which is situated directly above that portion 

 of the cave. This species is common throughout the Middle West and 

 Eastern States, and is abundant about Bloomington. 



Scytonotus granulatus (Say). 



Say, Phil. Acad. Nat. Sci., ll, 1821, 105; Entom. Works, ed. LeConte, ll, 27 (Pennsyl- 

 vania). Packard, Mem. Nat. Acad. Sci., iv, 1888, 65 (Indian Cave, Kentucky). 

 Bollman, Proc. U. S. Nat. Mus., xi, 1888, 407. Blatchley, Rep. Ind. Geol. 

 Surv., XXI, 1896, 202 (Little Wyandotte Cave). 



Fairly common from the mouth to near "6," but has not been seen 

 farther in. It is usually found upon the wall or roof. Taken in Twin 

 Cave also. Blatchley (1896, 202) found a single specimen in Shiloh 

 Cave, 200 feet back. Packard (1888, 65) mentions a bleached specimen 

 of this species from Indian Cave, Kentucky, and another bleached one 

 from Lyon Cave, Kentucky. This is not a cave form, but very commonly 

 visits the mouths of caves. This species also was found at a sink-hole 



