342 ENTOMOLOGY 
winged louse in the field and carries it down out of sight, and 
in one such instance it appeared that the wings had been 
enawed away near the body, as if to prevent the escape of 
the louse. Similar relations exist also between ants and some 
species of scale insects. 
Guests.—Though Aphid and Coccide are able almost 
always to live without the help of ants, there are some insects 
which have never been found outside the nests of ants. Most 
of these insect guests are beetles, notably Staphylinidz and 
Pselaphidee. The rove-beetles make themselves useful by 
devouring refuse organic matter, and these scavengers are un- 
molested by the ants with which they live. A few myrme- 
Fic. 286. 
Lomechusa strumosa being freed of mites by Dinarda dentata.—After WASMANN. 
cophilous beetles furnish their hosts with a much-coveted secre- 
tion and receive every attention from the ants, which clean 
these valuable beetles and even feed them mouth to mouth, as 
the ants feed one another. Lomechusa (Fig. 286) is one of 
these favored guests, as it has abdominal tufts of hairs from 
which the ants secure a secreted fluid. Atemeles (Fig. 287) 
is another; it solicits and obtains food from the mouth of a 
foraging ant as if it were an ant itself. In the Alleghanies, 
