288 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
It is not advisable to attempt characterization here of either 
families or genera. The following key aims simply at facilitating 
identification of the species known from our territory. 
Key to Species known from New England, — Adults only. 
(See Plate 13, fig. 1-15.) 
A. Tegtnina and wings absent. Large, dark-colored species. 
B. Antennae tapering, of one color, several of the terminal segments cylin- 
drical, five to six times as long as wide. Femora yellowish. Forceps 
of male widely separated at base, strongly asjTnmetric, that of right side 
much more arcuate than the left, strongly and abruptly widened at base. 
Maritime Earwig, Anisolabis maritima, p. 288. 
BB. Antennae filiform, the segments more or less obconic, the distal ones 
only two or three times as long as wide; usually one to three segments 
near apex and sometimes also near base palhd. Femora yellowish, 
usually banded with fuscous. Forceps of male approximated at base, 
but little asymmetric, the base of the right half not strongly and 
abruptly broadened in comparison with the left. 
Banded, or Ring-legged Earwig, Euborellia annulipes, p. 291. 
AA. Tegmina, or tegmina and wings, present. Small or medium-sized species. 
C. Second tarsal segment not prolonged beneath third in side view. 
D. Antennae with fourth segment nearly or quite as long as third. Wings 
present, exposed behind closed tegmina. Last visible ventral seg- 
ment of male with pronounced backward-pointing keel-Uke process. 
Little Earwig, Labia minor, p. 292. 
DD. Antennae with fourth segment distinctly shorter than third. Wings 
absent. Male wath last visible ventral segment rounded posteriorly. 
Brown Earwig, Prolabia arachidis, p. 293. 
CC. Second tarsal segment expanded distally, cordate, in side view pro- 
longed beneath the third segment. 
European Earwig, Forficula auricularia, p. 295. 
Maritime Earwig. 
Anisolabis maritima (Gene). 
Plate 13, fig. 12-14. 
Forficvla maritima Gene, Ann. Sci. di Regno Lombardo-Veneto, Padova, vol. 2, 
p. 215 (1832). 
Anisolabis maritima Walden, Bull. Geol. Nat. Hist. Surv. Ct., no. 16, p. 43, 
pi. 7, 9 (1911). 
Antennae 16- to 23-jointed (usually 19 to 20), about one-half as 
long as body without forceps, luteous at base, deepening gradually 
