374 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
the pattern varying much and consisting of spots and mottling 
arranged irregularly or somewhat regularly in either transverse 
or longitudinal bands. This is quite in keeping with their noc- 
turnal habits, for they shun the dayhght, soon crawling away 
when exposed to it, unless touched, when their powerful but 
erratic leaps quickly place them in safety. 
They differ notably from other members of the family in being 
apparently quite deaf and dumb, without special organs of hearing 
or of stridulation, and consequently are less frequently noticed. 
In diet they are said to be nearly omnivorous, eating dead in- 
sects and other animal matter as well as vegetable substances. 
Knowledge of our native species is in a chaotic condition, owing 
partly to lack of material and observations, and partly to errors 
of discrimination and even downright carelessness on the part of 
systematists. At least six distinct species of native origin and 
perhaps more inhabit New England; additional species should 
be sought in the caverns of the limestone areas along our western 
border. An exotic species from Asia has been introduced within 
a few years and maintains itself to the present time in conserva- 
tories. 
Key to Stenopelmatinae of New England. 
I. Vertex of head armed with a pair of short, conical spines pointing forward 
and downward. Hind tibiae armed above with two rows of slender, ap- 
pressed spinules arranged in series of 3 to 7 each, the members of each series 
increasing slightly in length apically. 
Asiatic, or Greenhouse Camel-cricket, Diestrammena marmoraia, p. 375. 
II. Vertex of head smooth, rounded. Hind tibiae armed above with four 
pairs of widely placed, large, movable spines (in addition to those at apex) 
and between them with numerous stout spinvles. . . .Ceuthophilus spp.^ 
A. Eighth dorsal abdominal segment with hind margin smoothly convex, 
thickened crescentically in rear view, concealing the ninth segment more 
or less completely. Subgenital plate short, scoop-shaped, with horizon- 
tal, semicircular, thickened margin. Hind femora serrate beneath with 
very numerous close-set denticulations on both edges, only two and a 
half or three times as long as wide, the lower margin strongly convex and 
the hind tibiae arcuate correspondingly. 
Yellow Cave-cricket, C. neglectus, p. 378. 
AA. Ninth dorsal abdominal segment with hind margin deeply obtuse-angu- 
lately emarginate. Subgenital plate with hind margin bracket-shaped 
(/— ^^— n). Hind tibiae arcuate at base. 
Spotted Cave-cricket, C. maculatus, p. 379. 
1 This Key applies only to the males of this genus. 
