FOHFICULID^. LABIA. 7 



between them ; the number of articulations in the antennae is fewer 

 than in Forficula, with which genus it agrees in having bilobed 

 tarsi. 



Sp. 1. albipennis? Plate xxviii. f. 5. forceps. — Testaceo-pallidaf route nigricanie, 

 thoracis medio abdominisque vitta abbreviatd laterali nigris, forcipe elongatd 

 subrecta, apice paullo incurvatd laterd interna dente medio instructd, injaemina 

 fere recta. (Long. corp. 4 — 5 lin.) 



Fo. albipennis. Charpent. Horas Ent. 68. — Fo. media. Hugenbach, Faun. 

 Helv. p. 16, /. 7 ? — Steph. Nomen. 2d edit. Appendix. — Fo. centralis. West- 

 wood MS. 



Very pale testaceous, the head rather dusky in front ; the middle of the thorax 

 obscurely black ; the abdomen with a distinct abbreviated black streak on 

 each side at the base, the segments to which it extends having an elevated 

 line : the forceps are long, not very much bent, being a little incurved at 

 the tip, and on their inner edge bear a single triangular tooth in the middle, 

 and at the base are a little waved : in the female the forceps are very 

 slightly incurved at the extreme tip only; and in both sexes they are 

 entirely pale. 



The colours are occasionally a trifle darker in tint. 



The only examples 1 have seen of this very distinct species were 



taken at " Ashford, Kent, June.'' — /. C. Westwood, Esq., to whom 



I am indebted for the insect and the loan of his specimens. 



Genus III. — LABIA, Leach. 



Antennas short, rather stout, consisting of from ten to twelve joints, basal one 



stoutish, second very short, third not so long as the fourth, which is stouter, 



and exceeds the second in length ; remainder gradually increasing in length, 



somewhat elongate-ovate, and stoutish, the terminal joint shortish and more 



slender. Falpi short, slender, terminal joint truncate pubescent; head 



rounded ; thorax slightly rounded in front, with all the angles rounded ; 



body pubescent ; abdomen with the caudal appendage in the male slightly 



incurved, and armed with numerous minute denticulations within, in the 



female straight and simple ; tarsi with the intermediate joint simple. 



From Forficula the simple intermediate joint of the tarsi, in 



addition to the dissimilarity of the forceps, as also the fewer joints of 



the antennse, distinguish Labia, as the latter character will from 



Labidura, in addition to other discrepancies — the present genus 



consists of but one indigenous species, which is extremely active, 



and flies elegantly in the sunshine, whereas the true Forficulas very 



rarely fly, at least in this country. 



