MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 71 



Two males and one female from One Hundred Dome Cave (Sanborn) were rather dark. 



Two mature females from Laurel Cave, Carter county, Kentucky (Sanborn), were as large as 

 those from Wyandotte Cave, and fully as pale, being lighter than usual. This species has not yet 

 been detected out-of-doors, and, like H. subterraneus and G. sloanii, is, so far as known, exclu- 

 sively confined to caves. The original locality mentioned by Mr. Scudder was Hickman's Cave, 

 Kentucky (Hyatt). 



Cetjthophilus sloanii Packard. 



CeuthopMlus sloanii Pack., Fifth An. Eep. Peab. Acad. Sci., 93, July, 1873. 



Six males and four females. Antennas banded with pale rings, a little more than three times 

 the length of the body;* the basal joint rather large; the .second half as long as the third, the 

 latter as loug as the first. Palpi considerably shorter than in C. stygius. The head in front is 

 much narrower than in G. latens and much as in G. stygius. Head brown above the eyes, with a 

 narrow, triangular, pale median area, which is the beginning of the dorsal stripe ; a dark median 

 spot in front of the eyes. The species is at once known by the conspicuous pale dorsal band which 

 extends from between the eyes to the fourth segment behind, dilating slightly on the front edge of 

 segments 2 to 4; the brown portion has scattered pale dots on each side of the liue, while on the 

 terminal segments of the abdomen the body is densely spotted with brown, the spots being 

 arranged in transverse bands. Cercopoda (anal cerci) dark. Hind femora unusually short and 

 stout, though a little slenderer than in G. latens, and more distinctly barred and spotted than in 

 that species. 



Length of body, 14 mm ; antennas, 30 to 40 mm ; hind femora, 10 mra . The ovipositor of the imma- 

 ture females only 2.2 rara in length, with none of the characters of maturity. Bradford Cave (Dr. 

 Sloan) ; Little Wyandotte Cave (Packard). 



A mature female was collected by Mr. Sanborn in John and Zed Field's Cave, near Dismal 

 Creek, Bee Spring, Kentucky, July 24. It differs from the others in the pale dorsal median band 

 not extending upon the head, but posteriorly it extends to the end of the abdomen. The markings 

 on the hind femora are as in the other specimens. 



The ovipositor is much shorter than in G. stygius, is rather slender, narrowing more at the 

 acute, upcurved end than in G. stygius, the inuer blades with five long slender teeth, increasing in 

 length to the last, being longer and slenderer than in G. stygius. Length of body without the 

 ovipositor, 16 mm ; of antennae, 32 mm ; of hind femora, 11.5 mm ; ovipositor, 5 mm . 



This species may easily be distinguished from C. stygius by the short au tenure and palpi, and 

 especially by the short hind femora and the pale conspicuous dorsal line on the head and thoracic 

 segments. From C. maculatus it is distinguished by the short hind femora and the distinct dorsal 

 line and longer antennre. 



Cetjthophilus ensiper Packard. 



Ceidhophilus ensifer Packard, Amer. Naturalist, xv, 882 ; PI. vii, figs. 4, 4a, 4b ; Nov. 5, 1881. 



This species differs from C. stygius Scudd. in the much more pointed saber-shaped ovipositor, 

 its tip being long, slender, and acutely curved, with six smaller teeth, there being but five in large 



Fig. 17. Ceutkophilus ensifer Pack., nat, size ; a, end of the abdomen, -with the outer blade of the ovipositor turned up to show the shape of 

 the toothed inner blade (the six teeth not, however, well shown) ; 6, the same with the outer blade in its natural position. Kingsley, del. 



individuals of C. stygius, in which the ovipositor is blunt and the tip obliquely truncate, while 

 the hind femora are a little longer. The eyes are as well developed as in C. stygius. The color 



* In C.mactilatu8 theantenn;<- are just twice the length of the body. 



