COLEOPTERA— APHANIPTERA. 33 



were seen at the first bend, where they had been so extremely abundant 

 before and the next day some were still there. Two days later a few 

 were seen at the mouth outside. On November 7 a few were found 

 just inside the mouth and one at the carcass of a mouse at " 11. " On 

 November 10 and 14, none, except one at "6," could be found, although 

 diligent search was made for them. They were not seen again until 

 the following autumn. 



In October, 1904, several were seen on the walls and a few under 

 stones from "1" to "4" while a single one was taken on the wall at 

 " 12. " All disappeared later. Nothing like the abundance of the year 

 previous was noticed, but they were fairly abundant, and those noted 

 may have been a few stragglers from among a great number similar to 

 that of the year before. During October for three successive years this 

 beetle was seen near the mouth in some numbers. Each time it was 

 very lively and soon afterwards disappeared. Once it occurred in immense 

 numbers and was apparently leaving the cave. This has the appearance 

 of migration. 



The species breeds in the cave near the mouth, but where such 

 numbers went or what became of them, I do not know. I took specimens 

 of this species in Twin Cave at Mitchell in October, 1902. 



Mr. H. F. Wickham says of its distribution and habits: 



It lives on the banks of streams habitually. Sometimes it occurs in numbers at 

 Iowa City. It has a wide distribution, being known from Lake Superior and Mar- 

 quette, Michigan, Pennsylvania, Alabama, Maryland, Massachusetts, New Hampshire 

 and Iowa. 



A species of Lesteva was recorded from Wyandotte Cave by Cope 

 (1872, 166). According to Leunis (1886, Bd. ii, 95), European species 

 of this genus live in dark places. 



There are 2 species of the genus Lathrobium of staphylinidous beetles 

 which live in European caves. One of them is eyeless and the eyes of 

 the other are very small. 



Family TENEBRIONIDAE, 



A larva of a species of this family was found in April, 1904, under 

 a piece of rotten wood at " 10. " It had probably been carried in by 

 the heavy flood of two weeks before. 



Order APHANIPTERA. 



A species of Aphaniptera (Siphonoptera) was seen in the cave at few 

 times. It was once taken off the loose, moist earth at "6," near the 

 carcass of a mouse, and was found upon bats. In no case was it 

 abundant. 



