. Dermaptera (Earwigs). Forficulidae. ANISOLABIS. 81 The sides of the sixth and seventh segments of the male are convex, often produced into a sharp point, striate, rugulose or even carinate ; this feature is present on a feebler scale in the female. Last dorsal segment in the S ample, subrectaugular, but broader than long, less broad than the preceding segments ; in the 2 similar, but somewhat narrower. Penultimate ventral segment of cT ovate or roundly triangular; broader in the $ . Branches of forceps in. Fig. 5.—Sternal plates of Anisolabis maritima, Bon. the S of two types : (1) contiguou
. Dermaptera (Earwigs). Forficulidae. ANISOLABIS. 81 The sides of the sixth and seventh segments of the male are convex, often produced into a sharp point, striate, rugulose or even carinate ; this feature is present on a feebler scale in the female. Last dorsal segment in the S ample, subrectaugular, but broader than long, less broad than the preceding segments ; in the 2 similar, but somewhat narrower. Penultimate ventral segment of cT ovate or roundly triangular; broader in the $ . Branches of forceps in. Fig. 5.—Sternal plates of Anisolabis maritima, Bon. the S of two types : (1) contiguous or subcontiguous, stout, nearly straight, tapering, or (2) remote, straight at first and strongly and abruptly bent inwards, the right branch often more strongly than the left. In the $ the branches are contiguous, straight, stout, tapering. Range. Cosmopolitan. After the removal of those forms now separated into Borellia- and the sinking of a number of names as synonyms, there are still about two dozen species left in this genus, occurring in all parts of the world. Their discrimination is often difficult, and it is- absolutely necessary to know the male before a species can be characterized or satisfactorily determined. Some species seem to have a very restricted distribution, though two, A. maritima and A. annulijjes, have become cosmopolitan. Immature specimens of various species of Psalis are often placed under this genus in collections, and sometimes may have beea described as species. Table of Sj^ecies. 1. Posterior margin of metasternal lobe romided ; size great; (forceps subcon- tiguous, straight; legs and antennae unicolorous) colossea, Dohrn, p. 82. Posterior margin of metasternal lobe truncate ; size medium or small. 2. Branches of forceps of c? remote at the base, strongly curved. 3. Thorax with faint median line; forceps of (5 abruptly bowed, with a rectangular internal projection on the right branch ] maritviut, Bon., p. 83^. Please note that these image
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