132 Mr. Malcolm Burr’s Preliminary Revision of the 
angusta, apice truncata, carinula humerali brevissima ; ale longa ; 
pedes breves; tibice vix depressie, haud vel vix sulcate ; abdomen 
subdilatatum ; segmentum ultimum dorsale magnum, transversum, 
margine postico medio impresso, utrinque tuberculato ; pygidium 
parvum; forceps ¢ basi incrassatus, subtriquetris; margine in- 
terno dente acuto magno armatus, arcuatus; 9 subrectus, inermis. 
In its variegated colour and the armature and shape of 
the forceps, as well as in the broad and transverse pro- 
notum, this genus approaches more nearly to Forficula ; 
it has the head of typical Forficula, while the tarsi are 
clearly referable to the group of the Chelisochidx. 
The only known species is Enkrates flavipennis, Fabr., 
from West Africa, of which the synonymy is rather 
confused. 
Forficula flavipennis, Fabr., Ent. Syst., ii, p. 5. (1793.) 
Forficula flavipennis, Scudd., Proc. Bost. Soc. N. H., 
xviii, p. 314. (1876.) 
Sphingolabis flavipennis, Kirby, W. F., Cat. Orth. 1, p. 46. 
(1904.) 
Sphingolabis variegata, Kirby, W. F., Linn. Soc. Journ. 
Zool., xxiii, p. 326. (1891.) id. op. cit. xxv, p. 529, Pl. XX, 
fig. 9. (1896.) 
Forficula variegata, Borm., Tierreich, Forf., p. 127. (1900.) 
Chelisoches vittatus, Burr, Ann. Mag. N. H. (7), x1, 
p- 274. (1903.) 
Chelisoches limbatus, Borg. Arkiv. for Zool. Bd., i, p. 575, 
Pl. XXVI, fic. 7. (1904) 
Genus 8.—ADIATHETUS,* nov. gen. 
Statura mediocri vel magna; antennze 20-segmentate, seg- 
mento 3 longo, sed quam 4 + 5 unita breviori; 4 quam 3 dimidio 
breviori, clavato ; 5 clavato, 3 subequanti: ceteris elongatis, sub- 
conicis: caput tumidum, suturis sat distinctis, margine postico 
recto; pronotum subquadratum, postice haud vel vix dilatatum, 
margine antico recto, postico subrotundato, lateribus rectis, angulis 
posticis rotundatis; prozona tumida, sutura mediana distincta, 
utrinque puncto impresso instructa ; metazona plana, lata ; elytra 
carinula humerali brevi, levia vel granulosa, lete metallico-niten- 
tia; ale longs, eodem colore: pedes sat graciles, tibiis superne 
integris ; abdomen validum, convexum, parallelum ; plicis lateral- 
ibus distinctis; segmentum ultimum dorsale ¢ magnum, quadratum 
* Gr. adideros =indisposed. 
