1916.] F.H. Gravety: Indo-Australian Thelyphonidae. 83 
(pp. 81-82). Species found in and near the Archipelago are evi- 
dently, then, more highly specialized and much more numerous 
than those in Burma, Assam and the Indian Peninsula. 
6. Thekeelless genera may for the present be regarded as two 
in number ; but it has been necessary to redefine them (pp. 61-63). 
The genus Labochitrus as redefined occurs in Africa, in South India 
and Ceylon, in Burma and the north of the Malay Peninsula, and 
perhaps in Borneo (pp. 64-67). It is composed almost entirely of 
relatively primitive forms which presumably had at one time a 
more continuously wide distribution than at present. Two species 
(L. andersont and L. ellist), however, show a specialization of the 
male tibial apophysis similar to that found in the higher members 
of the genus Hypoctonus, but affecting the upper instead of the 
lower border of the grooved surface. Both these species are con- 
fined to Burma (pp. 64 and 80). The genus Hypoctonus, which 
consists chiefly of the more highly specialized species of the group, 
is also confined to Burma, whose secluded valleys presumably form 
the main evolutionary centre of the group. The fauna of these 
valleys is very imperfectly known, and the species of this group 
have for the most part very restricted ranges. Probably, therefore, 
there is still much to be learnt with regard to them (pp. 61 and 8o). 
7. In the genus Typopeltis the number of records, espe- 
cially from Continental Asia, is exceptionally small in comparison 
with the range of the genus, which indicates that here too there 
is still much to be found out. For the present the most that can 
be said is that the evolutionary centre is presumably somewhere 
in the tropics, that the genus does not extend south of Indo-China, 
and that the only species in which the female is known to have un- 
modified antenniform legs occurs in Siberia on the northern peri- 
phery of the range of the genus (p. 80). 
5. Nothing can be said of the genus Mimoscorpius from the 
Philippines, as next to nothing is known about it. 
9g. Before concluding it may be well to note that the two 
American genera, which do not properly come within the scope of 
this paper, are both extremely primitive. Thelyphonellus has the 
male tibial apophysis less modified than any of its Oriental keel- 
less allies; and Mastiyoproctus has the genital sternum as little 
modified as the allied and primitive Oriental Uvoproctus, and the 
tibial apophyses alike in the two sexes. 
LIST OF PAPERS REFERRED TO. 
For a general bibliography see Kraepelin, 1897; for references 
to individual species see Kraepelin, 1899. 
1872. Butler, A. G.—‘‘ A Monograph of the Genus Thelyphonus.”’ 
Ann. Mag. Nat. Hist. (4) X, 1872, pp. 200-206, pl. xiii. 
1873. Butler, A. G.—‘‘ Descriptions of Several New Species of 
Thelyphonus.’’ Cist. Ent. I (6), 1873, pp. 129-132. 
