COLEOPTERA— CARABID.E. 27 



being much lighter than the average and about the color of the light 

 individual taken in Mayfield's. 



The individuals from Mayfield's Cave range from 4.4 mm. to 5.7 mm. 

 in length, averaging 5.09 mm. Those from Truett's Cave average 

 5.44 mm. in length, ranging from 4.75 mm. to 6.05 mm. Packard 

 (1888, 80) found 18 specimens from Bradford Cave to range from 4.1 

 to 5.1 mm. in length, with the tendency toward smaller ones in smaller 

 "more changeable" caves. 



This is the common Anoptkalmiis of Indiana caves and the only blind 

 beetle found in Mayfield's Cave. Taken in Mayfield's, Truett's, and 

 Twin caves. 



This genus is widely distributed in caves. Hamann (1896, 46) con- 

 siders it but a subgenus of Trechus. He names 51 species of the sub- 

 genus, principally cavernicolous, and 8 species of another subgenus of 

 Trechus, all of which are exclusively cavernicolous. The genus Trechus 

 itself has 5 European species occasionally found in caves, and others of 

 this genus habitually live under great stones often deeply embedded in 

 the earth. These and other lapidicolous Carabidse, many of them blind, 

 are of extremely minute size and of most sluggish habits. The genus 

 Trechus is found in North America, where it is represented by 4 species 

 living in retirement as the European species do. 



There are 8 American species of Anopthalmus, all but one confined to 

 caves. Six are recorded from Kentucky caves. One of these A. pusio, 

 is also found in Virginia. Another, A. eremita, has been described 

 from a single specimen from Wyandotte Cave and has not since been 

 taken. Anopthalmus tenuis has been taken only in the caves of Indiana 

 and in Luray Cave in Virginia. 



Patrobus longicornis Say. 



Trans. Am. Phil. Soc, n. s., vol. li, No. 1, 1823; Ent. Works, Le Conte ed., vol. li, 467 

 and 534. 



A specimen of this species was found in the dirt under a stone at 

 "4" in May. Its occurrence in the cave was accidental. 



It is an apterous species which lives in moist places under stones. 



Platynus cincticollis Say. 



Say, Trans. 'Am. Phil. Soc, n. s., li, 52; Ent. Works, Le Conte ed., vol. ii, 476. 

 Le Conte, Proc. Acad. Nat. Sci. Phila., 1854, 43; Bull. Brooklyn Ent. Soc, ii, 46 

 and 55. Wickham & Blatchley, Rep. Ind. Geol. Sur., xxi, 1896, 194 (Porter's 

 Cave) . 



Only 2 specimens of this species were found, one at "37" on a bank 

 of earth, and another on the wall past the first turn. 



