98 Mr. A. G. Butler on new Species of Butterflies 
with the sternum. The number of the lumbar vertebre is 
twelve, and of the vertebra of the tail twenty-five, of which the 
first eleven have large inferior spines between them, the first 
spine being incomplete and composed of two parts entirely sepa- 
rate. In the pectoral fins all the bones are well formed, as well 
as the little bones of the carpus, which are not cartilaginous ; 
only the last phalanges of the fingers are formed of this 
substance. 
XI.— Description of some new Species of Butterflies belonging 
to the Genus Athyma in the Collection of the British Museum. 
By Artuour G. Butter, F.Z.8., Assistant, Zoological Depart- 
ment, British Museum. 
1. Athyma lactaria, n. sp. 
Upperside—front wings dark olive-brown ; the discoidal streak 
broadly divided into three parts, white; two small white spots 
near the costa, placed obliquely halfway between the cell and the 
apex; a large white spot between the end of the cell and the anal 
angle, divided by the second median branch ; a submarginal row 
of five small white spots, the three upper ones subapical, placed 
obliquely : hind wings dark olive-brown ; costa and inner margin 
paler, a broad transverse central white band broadest between the 
discoidal nervules, narrowest at the inner margin ; a submargi- 
nal row of eight small white spots, equidistant except at the anal 
angle. 
Underside—front wings olive-brown; the discoidal streak as 
above but better defined ; three oblique subapical rows of elon- 
gate white spots, the two outer rows approximating, the outermost 
row sometimes continued along the outer margin; a large white 
spot between the end of the cell and the anal angle; three sub- 
marginal white spots along the anal outer margin, the lowest one 
obscure, the centre one large, oblong: hind wings white ; base 
~ and front margin dark olive-brown ; a white spot at the base,a 
second similar-spot near the base of the cell, and an elongate blu- 
ish white streak above the cell ; outer margin olive-brown, with 
a very narrow submarginal white line and a row of eight large 
white spots. 
Body brown ; palpi, two lateral streaks on the abdomen, and 
coxee pale ochreous. 
Expanse of wings 23-2 inches. 
Hab. Aru Islands. 
Alhed to A. Venilia, Linn. (Oceania), but the markings of the 
upperside more nearly resemble those of Neptis Jumbah, Moore. 
