HYPOCTONUS. 117 



occasionally separated by a very narrow partition which is less 

 broad than the diameter of either hole (fig. 36 E, p. 114). 



Length up to about 30 ram., $ ; 25-27, c? . 



Loc. Moulmein (Oates) ; also females of the same or of a closely 

 allied form from Taoo, 4000 feet (Oates). 



Subspecies insularis, Oates . Thelvphonus insularis, Oaf.es, J. A. S. B. 

 Iviii, pt. '2, p. 13, pi. ii, figs. 7-8, 1889 : Hypoctonus formosus, var. 

 iusularis, Kraep. Abh. Ver. Hamb. xv, p. 48, 1897 ; id. Tien:, 

 Scorp. etc. p. 231, 1899. 



Total length of adult rf and $ , 33-36 mm. 



Loc. Double Island in the mouth of the Moulmein River 

 (Oates). 



Representatives of this form, which was regarded by Mr. Oates 

 as a valid species, were collected in immense numbers in Double; 

 Island. Apart from its greater average size, however, there 

 appears to be no constant structural character by which insularix 

 may be distinguished from the mainland form formosus. 



The following species is known to me only from the description 

 given by Mr. Oates, which is here reproduced : 



100. Hypoctonus andersoni, Oates, J. A. S. B. Iviii, pt. 2, p. 11, pi. ii, 



fig. 12, 1889 (Thelyphonus); Kraep. Abh. Ver. Hamb. xv, p. 49, 

 1897; formosus, var. andersoni, id. Tierr., Scorp. etc. p. 231, 1899 

 (Hypoctonus). 



cT . Colour dark red, legs paler red. Chelae smooth, with a very 

 few minute punctures; COXOB normal, trochanter with a few obsolete 

 teeth on the anterior and lateral edge, and two strong spines 

 below ; femur with a sharp tooth on its lower surface ; tibia with 

 an indistinct spine on the lower edge. Tibial apopliysis ( fig. 36 C, 

 p. 114) about the same length as tibia, perfectly cylindrical for 

 three-quarters of its length, suddenly widened out on its ter- 

 minal quarter to half as wide again as the cylindrical portion and 

 terminating in a single recurved spine. Hand feeble, narrower 

 than tibia, interior edge toothed and hairy, exterior edge of the 

 fixed finger serrated ; movable finger curved, sharply pointed. 

 Carapace densely granular except on the portion between the 

 lateral and central eyes, which is smooth. First abdominal sternum 

 in female longer than in male and pointed posteriorly. 



Total length about 25 mm. 



Loc. Upper Burma : Pudeepyoo Mountain, and the second 

 defile of the Irawadi River (Anderson). 



Judging from the description and figure of the tibial apophysis, 

 this undoubtedly valid species is allied both to H. saxatilis and 

 //. sylvaticus, but cannot be confounded with either on account 

 of the red colour of the first leg and the quadrate shape of the 

 expansion of the tibial apophysis. It has been provisionally inserted 

 under heading a 3 in the table on p. 112 with H. si/lvaticus and 

 H. saxatills. 



