. Carnegie Institution of Washington publication. GENERAL CONSIDERATIONS. 93 applies equally well to the food, each species taking the same food as its epigean relatives. Attention has been called to this fact throughout the paper. Anopthalmus is closely related to the genus Trechus, whose almost innumerable species in Europe are much given to living in deep crevices in the earth or under large stones, not to mention about 60 species of this genus which frequent caves. Species of Platynus live in damp places in ravines and under stones along streams. Species of Quedius live in damp, shady plac
. Carnegie Institution of Washington publication. GENERAL CONSIDERATIONS. 93 applies equally well to the food, each species taking the same food as its epigean relatives. Attention has been called to this fact throughout the paper. Anopthalmus is closely related to the genus Trechus, whose almost innumerable species in Europe are much given to living in deep crevices in the earth or under large stones, not to mention about 60 species of this genus which frequent caves. Species of Platynus live in damp places in ravines and under stones along streams. Species of Quedius live in damp, shady places, as do also the members of the dipterous family Helomyzida?. Psychoda, outside of caves as well as within caves, lives under debris and its larvae are upon decaying matter. The spiders Phanetta subterranea, Willibaldi cavernicola, and Erigone infernalis live under stones in the cave, spin little or no web, and feed upon decaying organic matter, or catch their prey by springing upon it. They have outdoor relatives which live in the same retired situations Decaying organic matter Earth worms,etc. Fungi—Thysanura Diptera iv Mynapoda \\A Arachmda 1 ^Anopthalmus j Coleoptera S(rLp—r——. Ceuthophilus j. -^ Pe ro my sc u s Larger Mammals (on all the others) Cyclops Crangonyx Caecidotea Amblyopsis Cambarus FIG. 13.—Table of food relations of cave species. Reading from right to left the lines leading from Peromyscus indicate that it may feed upon decaying matter as well as all other animals in the cave, except those indicated in the lower part of the figure. Earthworms feed upon decaying organic matter, and in turn are fed upon by Spelerpes and Peromyscus. and feed in the same manner. On the other hand, Theridium kentucky- ense, T. porteri, and others which live near the mouth and spin snares to catch their prey either themselves live outside of caves occasionally or have near relatives which live outside and likewise spin snares to catch prey. The cave species spin the web
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