686 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXIII, 



present in darlisa, but is not so marked in lisarda, the two series are 

 almost parallel. For the rest, the spots are in the same positions, and are 

 of the same colour and size as those of darlisa. The black ground colour 

 is similarly glossed with blue. 



Sindioing. — -Basal area uniform black, there being sometimes just a 

 dusting of straw-coloured scales in the apex of the cell. The straw-colour- 

 ed internorvular of the discal series streaks are broad and clavate, herein 

 differing from both darlisa and lisarda. They might almost be said to form 

 a band traversed by the black veins. These streaks are followed by a 

 sub-terminal series of spots, more or less hastate in shape and as broad as 

 the interspaces ; the postdiscal series, common to all forms of darlisa and 

 lisarda is absent, the discal streaks extending to the position these spots 

 should occupy. All these markings are pale straw-coloured, as in darlisa. 



Underside. — Ground colour as in darlisa, that is apex of forewing and all 

 the hindwing rufous brown, the basal area of the forewing darker, not 

 rufous. Streaks and spots as on the upperside. Antennte, head, thorax 

 a,nd abdomen as in darlisa. 



Expanse. — 110-125 nun. 



Habitat. — Pegu, Yoma, Tharrawaddy District in Lower Burma. Described 

 from two specimens from the above locality, caught in April 1909 and May 

 1912, in heavy jungle. Elevation 200 to 1,600 feet. One was taken feeding 

 on the skull of a recently killed serow. 



The type specimen, wJaich I take to be a male, has been deposited in the 

 British Museum. 



These two specimens were the only Penthemas I got in four years' collecting 

 in Tharrawaddy. It does not seem as if either darlisa or lisarda flew with 

 it. On the other hand a single Pentlwma I have from the Arakan, Yoma, 

 Henzada District, to the west is lisarda while on the east, at Pathichaung 

 in the Toungoo District at the foot of the Karan Hills, darlisa occurs. It 

 therefore seems likely that the present form is peculiar to the forests of the 

 Pegu Yoma, which forests are isolated from those to east and west by big 

 rivers (Sittang and Irrawaddy) and their plains. 



As to whether the form now described should be regarded merely as a 

 race of darlisa, it can be understood that a form represents a race of 

 another when its markings are those of that other, either partly absent or 

 reduced or increased in size [e.g. binghami race of darlisa^. But in the 

 present case while the basal markings are entirely gone from the hind- 

 wing, this being apparently a change in the direction of darlisa, the discal 

 markings are even more prominent than in lisarda, while there is no sign at 

 all of the postdiscal series of spots, common to both those forms, not even 

 of their being joined to the discal streaks. 



DeNiceville (Vol. ii, page 144), Bingham (Vol. i, page 390), and Evans, 

 {Journal B. N. H. S., Vol. xxi, page 580), all show three species of 

 Penthema ; lisarda, darlisa, and bingliami. Seitz, at page 463 of Vol. iv, 

 gives two species from India, sinking binghami as a race of darlisa. 

 He also raises onihintala as a new race of lisarda from the Chin 

 Hills of Upper Burma and gives two other races of darlisa, but all the 

 forms he describes have the markings constant throughout, though reducing 

 in size, and none resemble the present form in the least. 



In the accompanying plate the upper figure is P. lisarda from the Teesta, 

 the two central figures are P. yoma and the lower is P. darlisa from the 

 North Shan States. The last named does not quite agree with Bingham's 

 figure, and may not be typical. 



E. V. ELLIS, i.v.a. 



Lyme Regis, England, 7th October 1914, 



