Forficulide and Chelisochide, families of Dermatoptera. 101 
insect which I have described as Opisthocosmia vivax; in 
its general appearance it appears to be distinctly related 
to the genus Opisthocosmia but it differs in the depressed 
abdomen, in this respect affording a transition towards the 
Ancistrogastrine, but in other respects it appears to be 
referable to this group; the sutures of the head are 
very deep and well marked, dividing the head into 
three distinct divisions; the divided bifid pygidium is 
characteristic. 
The unique specimen, which is in the Calcutta Museum, 
is unfortunately broken, so that it is not possible to 
determine the sex with satisfaction; the well-marked 
characters point to a male, but perhaps the simple form of 
the forceps implies the opposite. In my original descrip- 
tion, I regarded it as a female, but upon further consideration 
I am inclined to consider it a male. 
It is unfortunate that further material has not come to 
hand since, in order to locate its position with accuracy. 
Type of the genus.—Opisthocosmia vivax, Burr, Journ. 
Proc. Asiat. Soc., Bengal, N.S. vol. 1, No. 2, p. 30. (1905.) 
(India. ) 
Genus 3.—HYpPuRGUS,* nov. gen. 
Antenne 12—13-segmentatee, graciles, segmentis gradatim elongatis 
cylindricis, 4 quam 3 sublongiori, 5 quam 4, etc. ; caput leeve, suturis 
obsoletis ; pronotum capite haud angustius, subquadratum, margine 
postico rotundatum, vel semilunare ; margine antico truncato ; pro- 
zona tumida, metazona plana, lateribus reflexis ; elytra ampla, lata, 
humeris latis, carina exteriori nulla ; ab humeris attenuata, margine 
postico truncata vel subemarginata ; ale perfecte explicate, long 
vel abbreviate ; pedes graciles, longi, femoribus haud incrassa- 
tis ; tibiis integris ; abdomen basi constrictum et angustum, con- 
vexum, medio plus minus dilatatum, tuberculis pliciformibus dis- 
tinctis, segmentis 5-6-7-8-inermibus, apice attenuatum ; segmentum 
ultimum dorsale angustatum, declive, margine postico incrassato, 
obtuse tuberculato; 2 angustatum, minus fortiter tuberculatum ; 
pygidium nullum vel vix perspicuum, minimum, brevissimum, 
obtusum ; forcipis bracchia ¢ elongata, paullo curvata, vix arcuata, 
sat fortia, basi subcontigua, dentibus nonnullis interdum margine 
interno armata, apicem versus seepe sat arcuata ; 2 typice, graciles, 
recta, inermia. 
In this genus are included those former species of 
* Gr, brovpyds = minister. 
