96 BRISTLE-TAILS AND SPRING-TAILS. 
Our only American species of Campodea (C. Americana Pack.) 
lives under stones in damp places. It is yellowish, about a sixth 
of an inch in length, is very agile in its movements, and would 
easily be mistaken for a very young Lithobius. Haliday has re- 
marked that this family bears much resemblance to the N europ- 
terous larva of Perla, as previously remarked by Gervais; and 
the many points of resemblance of this family and the Lepismide 
to the larval forms of those Neuroptera that are active in the pupa 
J 
Japyx. 3 Campodea. 
state (the Pseudo-neuroptera of Erichson and other authors) are 
-very striking. Campodea resembles the earliest larval form of 
Chloéon, as figured by Sir John Lubbock, even to the single-jointed 
be re- 
Fig. 24. Fig. 25. 
? 
tarsus; and why these two Thysanurous families should 
moved from the Neuroptera we are unable, at present, to under- 
stand, as to our mind they do not diverge from the Neuropterous 
type any more than the Mallophaga, or biting lice, do from the 
type of Hemiptera. 
Haliday, remarking on the opinion of Linnæus and Schrank, who 
