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 R. 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). 
Ceuthophilus sloanii Packard. 
J 
Ceuthophilus sloanii Pack., Fifth An. Rep. Peab. Acad. Sci., 93, July, 1873i 
Six males and four females. Antenme 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 long as the first. Palpi considerably shorter than in G. 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 baud 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 line, 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 ; antennae, 30 to 40 mm ; hind femora, 10 mm . The ovipositor of the imma¬ 
ture females only 2.2 mm 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 baud 
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 iu G. stygius, is rather slender, narrowing more at the 
acute, upcurved end than in G. stygius , the inner 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 G. stygius by the short antennae and palpi, and 
especially by the short hind femora and the pale conspicuous dorsal line on the head and thoracic 
segments. From G. maoulatus it is distinguished by the short hind femora and the distinct dorsal 
line and longer antennae. » 
Ceuthophilus ensiper Packard. 
Ceuthophilus ensifer Packard, Amer. Naturalist, xv, 882; PI. vii, figs. 4, 4a, 4b; Nov. 5, 1881. 
This species differs from G. 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. Ceuthophilus 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); b , the same with the outer blade in its natural position. Kingsley, del. 
individuals of G. 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 G. stygius. The color 
* In C.maculatus the antennas are just twice the length of the body. 
