14 
INSECTS OF THE CAVE. 
Fig. 127. 
kampl’s figure indicates, it is the same species apparently, as I 
have received numerous specimens of this widely distributed form 
from Knoxville, Tennessee, collected by Dr. Josiah Curtis. 
It was regarded as a crustacean by Tellkampf, and described 
under the name of Triura cavernicola.* He mistook the labial 
and maxillary palpi for feet and regarded 
the nine pairs of abdominal spines as feet. 
The allied species, 31. variabilis Say, is 
figured in vol. v. pi. 1, fig. 8, 9 (see also 
p. 94 of vol. V of the Naturalist). 
An interesting species of Campodea| of 
which the accompanying cut (Fig. 127) is 
a tolerable likeness, though designed to il- 
lustrate another species {C. staphyliniis 
Westw.) was discovered by Mr. Cooke. 
Both the European and our common spe- 
cies live under stones in damp places, and 
the occurrence of this form in the water is 
quite remarkable. The other species are 
blind, and I could detect no eyes in the 
Mammoth Cave specimen. 
A small spider was captured by Mr. 
Cooke, but afterwards lost ; it was brown 
in color, and possibly distinct from the 
AnthroUa monmouthia Tellkf. (Fig. 128) which is an eyeless form, 
white and veiy small, being but half a line in length. The family 
Campodea. 
* Professor Agassiz in his brief notice of the Mammoth Cave animals, does not criti- 
cise Tellkampf s reference of this animal to the Crustacea; and so eminent an authority 
upon the articulates as Schiodte remarks that while “ Dr. Tellkampf’s account afiforas 
us no means of forming any conclusion as to its proximate relations,” that, however, 
it “ appears to belong to the order of Amphipoda, and to have a most remarkable 
structure.” Tellkampfs figure of Machilis is entirely wrong in representing the labial 
and maxillary palpi as ending in claws, thus giving the creature a crustacean aspect; 
and ndeed he describes them as true feet! 
t Campodea CooJcei n. sp. Closely allied to C. Americana, hnt it is much larger; the an- 
tennas are 24-jointed instead of 20-jointed as in C. Americana, and reach to the basal 
abdominal segment, while in C. Americana they reach only to the second thoracic; the 
terminal joints are much longer than in that species, the penultimate joint being one- 
third longer. Last three abdominal segments unequal (equal in C. Americana) the penul- 
timate very short, not half as long as the terminal, which is longer and slenderer than in 
C. Americana, while the three are much narrower in proportion to the rest of the body 
than in the other species. Hind femora longer than in C. Americana. Entirely white 
and pilose. Length .2.5 inch, the largest C. Americana being .15 to .20 inch. (Anal sty- 
lets broken off.) Several specimens were seen by Mr. C. Cooke, but only one was cap- 
tured in a pool of water, two or three inches deep, in company with the Ca cidotea. 
