46 FAMILY I. FORFICULID^E. THE EARWIGS. 



gether rarely longer than the first. I. LABIDURIN.*:. p. 46. 

 bb. Antennae with 11 to 15 segments, the fourth, fifth and sixth to- 

 gether longer than first (Fig. 25, a.) II. LABIIN.E, p. 49. 

 aa. Second tarsal joint lobed and prolonged beneath the third. (Fig. 25, 

 c) ; antennae with 12 to 15 joints. III. FORFICULINVE, p. 54. 



Fig. 25. a. Basal joints of antennas of Labia showing relative proportions of seg- 

 ments; b, same of Prolabia', c, tarsus of Forficula showing lobe of the second segment. 

 (After Caudell.) 



(After Caudell.) 



Subfamily I. LABIDURINJE. 



Body not strongly flattened; pro- and mesosterna not nar- 

 rowed behind ; legs stout and short ; abdomen slightly dilated be- 

 yond the middle. Two genera occur with us, easily separated as 

 follows : 



KEY TO GENERA OF LABIDURIN^E. 



a. Tegmina and wings wholly wanting; sixth joint of antennae a little 

 longer than broad; cheeks behind the eyes, when viewed from 

 above, slightly longer than the eyes. (Fig. 26, c.). 



I. ANISOLABIS. 



aa. Tegmina and wings present; sixth antennal joint no longer than 

 broad; cheeks no longer than the eyes. (Fig. 26, b. ) 



II. LABIDURA. 



I. ANISOLABIS Fieber 1853, 257 (Gr., ''unequal" -+- "forceps.") 



Body long, rather slender, wholly apterous, of nearly equal 

 width throughout ; antennae scarcely half the length of body ; sec- 

 ond and third abdominal segments often with small lateral folds 

 or tubercles; subgenital plate rounded, male, triangular, female; 

 forceps short, pointed, the right leg curved in more than the left, 

 male, short and nearly straight, female. Two cosmopolitan spe- 

 cies occur in North America. 13 



KEY TO NORTH AMERICAN SPECIES OF ANISOLABIS. 



a. Antenna? 24-jointed; apical third of antennae without pale segments. 



1. MARITIMA. 



13 A single specimen of a third, Anisolabis (Eiiborcllia) ainbigna Borelli, described 

 from Costa Rica and frequent in the West Indies, has been recently taken by Hebard 

 at Miami, Fla. It is probably only an adventive not as yet established in Florida. 



