Records of the Indian Museum (A Journal of Indian Zoology). Vol. XII Part II. March 1916

Kraepelin's classification is based mainly on the presence or absence of a keel between the median and lateral eyes and of a tooth on the inner side of the gnathobase of the arm the number of vitreous spots ( ommatoids ") on the third caudal segment and the form of the tibial apophysis of the male. [...] In this connection it is perhaps noteworthy that Hyboctonus stoliczkae the only known species of the genus as hitherto defined in which there is a tooth on the gnathobase of the arm occurs in the excessively damp region at the base of the Darjeeling hills together with the genus Uroproctus which is also characterized by the possession of such a tooth; and that the remaining genus Labochirus w [...] UroProctus differs however from MastigoProctus in having the tibial apophysis of the male markedly slenderer than that of the female and differs from this and from all other genera of the group in the presence of a tooth on the inner side of the gnathobase of the arm. [...] In this as in all the following species of the genus the lower ridge of the grooved surface of the tibial apophysis of the male (pl. [...] 71 The tarsi of the antenniform legs are modified in the female of this and all the remaining species of the genus.