PRIONERIS. By Ii. Fruhstorfer. 
135 
rowed. — voconia subsp. nov., from Bohol, very similar to the preceding, but with the blue median area on both voconia. 
surfaces of the forewing in He? and $$ even less developed. — camotana subsp. nov., with pure white, relatively camotuna. 
broad median band on the forewing, from Camotes, forms a transition to ottonia Hemp., of which the are ollonia. 
distinguished by the dark blue-grey, more sharply defined median area of the forewing and the $$ by the pure 
white median band of the forewing and by the median spot on the underside of the hindwing filling up almost 
the whole of the cell. Mindanao. — Sucerna Btlr., with the uncertain locality Mindanao, is the name of a local lucerna. 
or seasonal form with the median bands on the forewing even narrower than in hemera and henningia and pure 
white in the cell. — saturnia form, (or subsp.) nov. differs especially on the hindwing beneath in the stronger sahirnia. 
development of the black basal spots, in consequence of which the yellow patches in and around the cell and also 
the submarginal area are reduced. East Mindanao. 
D. kummeri Ribbe (54 c). above pure white with the broad black apical border which is typical kummeri. 
of so many New Guinea Delias, which in the $ is also continued on the hindwing. Forewing of the $$ somewhat 
shorter than in the £<$. — An interesting form, in which the red submarginal line of the hindwing beneath is 
continued from the anal angle to the costal margin, has been named by Rothschild and Jordan ligata (56 f). ligata. 
Locality the Aroa River, British New Guinea. 
D. weiskei Ribbe (= mirifica Gr.-Sm .) (56 f). Above like the preceding. The $ has likewise a broader weislcei. 
black distal margin and 2 or 3 white subapical dots on the forewing, which are absent in the <$. Locality as the 
preceding. 
D. bornemanni Ribbe (56 e). The upper surface in both sexes as in the preceding except that the black bornemanni 
distal border of the forewing is widened to beyond the margin of the cell. On the under surface the red spots 
are somewhat reduced in the $. British New Guinea. Common. 
D. microsticha R. & -J. (56 e). This species belongs to the mysa -group according to the character of microstichci 
the pattern of the under surface, but is included here on account of having the basal spot of the hindwing beneath 
red instead of yellow. The $ is still unknown. British New Guinea. 
6. Genus: Prioneris Wall. 
The species of this genus, which is distinguished by the dentate costal margin of the forewing in the 
approach Delias in their habitus and the character of the markings. But the butterflies are altogether more robust 
and are more rapid fliers than the Delias. Forewing with four subcostal veins, of which two arise before the end 
of the cell, as in Pieris. The genus differs from the likewise allied Tachyris by the absence of the anal tufts of 
hair. Larvae blue-green, laterally adorned with soft white hairs and with blue tubercles, those at the head and 
sides with black dots. On Capparis. Pupa light green, head with sharp tip, the dorsum keeled with a yellow 
line, laterally armed with 2 strong spines. Butterflies on the mainland of India in the warmer valleys, but in 
the Malay Archipelago preeminently inhabitants of the mountains. Some species rare, but sometimes occurring 
in many thousands. The very resistant dentitions of the forewing, with the points directed towards the apex, 
can easily be recognised even with the naked eye. The small, close teeth are so strong that they are capable of 
catching the finger and causing the wing to bend when the tip of the finger is moved along from the apex to 
the base. Wallace regards the ,,rarer“ Prioneris as a mimetic form of the „commoner“ Delias. But I cannot 
accept his view, since mimicry among the in all respects harmless Pierids appears no sort of protection, and 
properly speaking the smooth-margined Delias should rather copy the armed Prioneris, if there is assumed to 
be mimicry at all. 
P. thestylis Dbl. (57 e), a characteristic butterfly of the Indian fauna, distinguished by its size and its thestylis. 
tendency to horodimorphic variations. The under surface of the rainy-season-form black, with large white spots 
on the forewing and long, light to dark yellow patches and similarly coloured cell on the hindwing. — The $$ of 
the rainy-season-form, seta Moore, are also beneath predominantly black, with narrow yellow cell-stripe and seta. 
reduced submarginal spots on the hindwing beneath. The dry-season-form, watsoni Hew. (57 a), to which watsoni. 
many transitional forms lead over, is beneath tinged with black only at the apex, at the cost al margin of the otherwise 
white forewing and round the cell of the otherwise light orange-yellow hindwing. Only the under surface of the 
forewing of the $ is entirely black like that of the rainy-season-form. The thestylis are fond of open country; 
they fly high and jerkily and congregate at sand-banks or moist places, sometimes to the number of many hundreds. 
The $, however, exclusively visits flowers. In the Himalayas the butterflies ascend to 5000 ft. — The Sikkim 
form is somewhat lighter than the melanotic specimens from Assam, thestylis has also been observed recently 
in the West Himalayas. — jugurtha subsp. nov. is a larger race with more extended white subapical and sub- jugurtha. 
