176 PROCEEDINOS OF THE NATIONAL MUSEUM. vol. xxxiii. 



Description — Male: Head moderate; eyes prominent; antennje 13 

 jointed, of the usual structure. Pronotum equaling the head in 

 width, 8ubquadrate, posteriorly broadly rounded, anteriorly very 

 slightly excavate, the sides straight, thin and inclined a very little 

 upwards; disk a little convex with a persistent slender median sulcus, 

 broader in the anterior half. Abdomen moderate, broadest mesially, 

 the surface punctured, the segments apicalh^ rounded, the second and 

 third with distinct lateral tubercles, those on the third segment the 

 larger. Elytra nearly twice as long as broad, together slightly broader 

 than the pronotum, posteriorly truncate, the sides deflexed, the pos- 

 terior lateral angles rounded; the elytra meet in a slightly curved 

 line and the left one has a slight curved depression in the middle 

 near the inner margin. Wings projecting a very little beyond the 

 tips of the elytra, scarcely extending over the basal segment of the 

 abdomen, but when more specimens are examined this will probably 

 be found to vary somewhat. Legs moderately stout, the second 

 joint of the tarsi distinctly cordiform. Forceps contiguous on the 

 basal eighth, or slightly less, by a ))asal expansion which extends 

 almost horizontall}^ inwards from the arm of the forceps and is den- 

 tate on the inner margin; from the ampliate contiguous base the 

 forceps are rounded, unarmed and uniformly curved. Pygidium not 

 visible. Color of the head, pronotum, elytra, wings, abdomen and 

 most of the forceps black, antennae dark brown, uniform, legs light 

 brownish j^ellow, the femora slightly darkened above, forceps at the 

 extreme base above yellowish. 



Female: Similar to the male, the abdomen more uniformly heav}', 

 not noticeal)ly widened mesially; the wings project more than in the 

 male type, the projecting portion of each being longer than wide: the 

 forceps are nearly straight, the tips a little incurved apically and the 

 basal two-thirds are triquetreous, inw^ardly slight!}^ depressed and 

 minutely serrate, the apical third cylindrical and unarmed. 



Length. — Body, without the forceps, male, 7 mm., female, 10 nun.; 

 forceps, male, 2 mm., female, 2 mm. 



Type-specime7i.—C^i. No. 10370, U.S.N.M. 



This black earwig is superficially somewhat allied to F. liu/uhris, 

 but is amply distinct from that species. It resembles somewhat the 

 J^. metrica of Rehn, l)ut the forceps of the male will at once separate 

 it from that species. 



