894.] L. do Niceville — BiiHerJlies from the Tndo-Mahnjan ^wjion. 25 



I have a good series, Ibut it may at once be known from that species 

 on the upperside by the hindwing being white on the disc with a pro- 

 minent dark disco-cellular line, G. zincJcenii being dusky thi'oughout ; 

 on the underside the ground-colour is a pale slate-colour, in G. zinclceml 

 it is pale feiTUginous. 



Described from two specimens, one in Dr. Martin's and one in my 

 collection, taken in the Battak Mountains in October, 1892. 



2J, Gerydus GALLUS.n. sp., Plate V, Fig. 11, ?. 



Habitat : Battak Mountains, N.-E. Sumatra. 



Expanse : ? , 1*5 inches. 



Desceiption : Female. Upperside, both loings fuscous. Foreiving 

 with the apical area darker than the basal ; crossed by an oblique discal 

 white band with highly irregular edges, not quite reaching the costa 

 or the outer margin above the anal angle, ending posteriorly on the 

 submedian fold. Cilia fuscous. Hindwing immaculate. Cilia ante- 

 riorly white, becoming fuscous towards the anal angle. Underside, 

 hotli wings highly variegated, being coloured black, white, pale ochreous, 

 and ferruginous. Forewing with the ground-colour black ; the discal 

 white band as above but broader, its edges even, reaching the outer 

 margin at the anal angle ; a pale ochreous patch at the apex, below 

 which the ground-colour is ferruginous ; three white ring-spots on the 

 costa ; two similar ones in the discoidal cell ; a prominent black spot at 

 the anal angle ; a submarginal macular black line. Hindwing with the 

 anterior half pale ochreous, the posterior fuscous mottled with ochreous ; 

 the macular markings as usual, though somewhat indistinct. 



This may be a highly variegated form of G. symethus, Cramer, a 

 common species in N.-E. Sumatra, but it differs greatly from any 

 specimen of that species in my large suite of examples from the Malay 

 Peninsula, Sumatra, Borneo, and Java, from all of which G. gallus 

 differs in the white band on the upperside of the forewing being half 

 as wide, the hindwing concolorous throughout, and by the highly 

 variegated markings of the underside. 



Described from a single example in Dr. L. Martin's collection. 



As the genus Gerydus, Boisduval, has vastly increased in numbers 

 in recent years, it may perhaps be useful to add a list of the described 

 species, as far as I know them. Many species described in this genus 

 do not belong to it at all, and have been excluded. The flattened legs 

 of all the species is an unique character by which they may be instantly 

 known. The list is headed by the largest, most beautiful, and most 

 aberrant species. 

 J. II. 4 



