MEMOIRS OF THE NATIONAL ACADEMY OP SCIENCES. 69 



LOCALITIES, WITH NOTES ON VARIATION. 



(A) Mammoth Cave region (Edmonson county). — In forty males and fifteen females from Mam- 

 moth Cave (Packard) there was no variation in the size of the eyes. In two young females of the 

 same size (length, 12 mm ) the ovipositor is normal in one, in the other only one-third as long, the 

 latter being less sexually mature. This shows that the principle of acceleration and retardation 

 may work in caves as well as Out of doors; in this case sexual development was much retarded. 



In ten males and twelve females collected by C. Cooke in Mammoth Cave (Mus. P. A. S.) there 

 was no sensible variation in the eyes or ovipositor. 



Four males and eight females from Dixon's Cave (Packard coll.) presented no differences from 

 those in Mammoth Cave. 



Twenty four males and twenty-two females from White's Cave (Packard coll.), occurring from 

 the end of the cave to within 5 feet of the mouth, did not differ in any respect from Mammoth 

 Cave examples, the eyes being of the same size and the antennae of the same length. 



Eight males and six females from a small cave near Ice cave (near Mammoth), which was about 

 80 feet deep, had eyes which were certainly no larger than those Mammoth Cave examples and 

 showed no other differences. We would naturally expect that the eyes of H. subterraneus from 

 such a small cave as this and those from within 5 feet of the mouth of White's Cave would show 

 larger eyes, but they were in no respect different, so far as we could see. 



Eight males and two females from Salt Cave, as regards the eyes, Avere just the same as Mam- 

 moth Cave specimens. 



Twenty five males and fifteen females from Diamond Cave (Packard fall had eyes, both young 

 and old, of the normal size. 



Two males and two females from Mail Robber's Cave, near Glasgow Junction, which is 100 feet 

 deep (Sanborn), were normal. 



Eight males and four females from a cave near Baker's Furnace, collected by Mr. Sanborn 

 (June 19) at a point nearly 100 feet from daylight, had eyes like Mammoth Cave examples. 



In a pair (one male, one female) from One Hundred Dome Cave, near Glasgow Junction, col- 

 lected by Mr. Sanborn (May 10) at about 200 yards from the entrance, the eyes are as in Mammoth 

 Cave examples. 



Six males and six females from Walnut Hill Spring Cave, collected May 14 by Mr. Sanborn 

 100 yards from daylight, were normal as regards the eyes. 



Eight males and twelve females, collected July 24 by Mr. Sanborn in John and Fred's Cave, 

 on the east bank of Dismal Creek, 200 yards in from the mouth, did not differ from Mammoth Cave 

 forms. 



Five males and females collected by Mr. Sanborn in Short Cave, near Glasgow Junction, had 

 eyes of the normal size, as in Mammoth Cave individuals. 



Twenty males and females collected by Mr. Sanborn in Proctor's Cave, 5 miles from Glasgow 

 Junction, had eyes all of the same size and like those of Mammoth Cave individuals. 



Two males and six females collected by Mr. F. W. Putnam (November 12) in Grand Avenue 

 Cave had eyes of the normal size. 



Two males and females collected by, Mr. Sanborn in Little Lithographic Cave No. 2, Glasgow 

 Junction, had eyes of a normal size. 



Three males and one female, collected May 28 in Poynter's Cave (Sanborn), had eyes of normal 

 size. 



Fourteen males and three females from the cave under Gardiner's Knob, near Glasgow Junc- 

 tion (Sanborn), had normal eyes. 



Ten males and five females from Sugar Bowl Cave, 3 miles west by north from Glasgow Junc- 

 tion (Sanborn), had eyes of the usual size. 



Ten males and ten females from Wetzel's Cave (May 30, Sanborn) had normal eyes. 



One male from One Hundred Dome Cave (Sanborn) had normal eyes. 



Six males and two females from Haunted Cave (June 13, Sanborn) had normal eyes. 



Four males from Emerson Spring Branch Cave (collected June 12 by John E. Proctor, esq.) 

 had eyes of the usual size. 



