68 Records of the Indian Museum. [VOL Sole 
Hypoctonus birmanicus, Hirst. 
Lower Burma: Pegu. 
Only the male is known. It was described in Ig11I. It is 
said to be closely related to H. binghamz. 
Hypoctonus binghami (Oates). 
Lower Burma: Tavoy—*Reef Island at mouth of Tavoy 
River. 
Megui—Owen Island. 
In this species also the genital sternum of the female is not ex- 
tended backwards in the middle. The male is unknown to me, 
but appears from descriptions to have a somewhat more strongly 
modified tibial apophysis than has that of H. oatesz. 
Hypoctonus formosus (Butler). 
(Pit, 1¢-320;) 
Lower Burma: Amherst District—*Moulmein (H. formosus, 
s.sty.); *Double Island(H. formosus, subsp. 
insularis). 
Also recorded from Taoo, a place whose whereabouts is un- 
known to me. 
Thorell gives a number of additional localities, this being the 
only form without keels between the median and lateral eyes that 
was recognized when he wrote. His records probably refer to 
several distinct species. Simon’s specimens from Tavoy, similarly, 
were no doubt H. binghami as already suggested by Oates (1889, 
p26); 
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. ii, fig. 20) is strongly developed near the tip, and the genital 
sternum of the female is produced backwards in the middle. 
Hypoctonus rangunensis (Oates). 
(Pl. io hig. 2258) 
Lower Burma: *Rangoon; ? *Arakan. 
Also recorded from Palon, of whose whereabouts I am uncer- 
tain. 
The Arakan specimen is a female with all the characters of 
the Rangoon species. 
Deep grooves are present between the paired cavities and 
posterior margin of the genital sternum of all females of this 
species that I have seen. 
