818 
GERYDUS. By H. Frithstorfer. 
They seem to be too much occupied with the aphis and not to be able to bestow care on the welfare of the 
jacchus. larvae, as they do with those of Spindasis lohita and Ogyris (Kershaw). — jacchus Fruhst. Luzon. $ with 
a relatively large sexual spot of the forewing. $ distinguished by an almost roundish median spot of the forewing. 
paianius. — paianius Fruhst. Mindoro, Baco District. forewing with a very large white discal spot. Under surface 
epiclurus. darker than in Luzon-specimens. Type in the British Museum. -— epidurus Fruhst. Palawan. in two forms: 
a) with a white spot in the anal angle of the forewing beneath; b) without this spot. The white tint in a), 
vincula, however, less conspicuous than in the Borneo-race. — vincula Druce occurs in North Borneo, particularly 
on the Kina-Balu. $ with a very large androconial spot of the forewing, being sometimes besides encircled 
by an extensive white halo. The $ is absent in my collection, by its unicolorously brown forewings it reminds 
h era con. us of the 9 of G. learchus gaesa Nicev. — heraeon subsp. nov. is the contrary of vincula. The sexual spot is 
extremely thin, only like a streak, without any whitish halo at all, the ^differing moreover beneath from vincula 
by the whitish subanal area appearing in most of the covered by a dull brownish grey. Sintang, on the 
Kapuas, flying in April. A $ from South East Borneo approximates the $ of G. boisduvali from Java (141 e), 
hyllus. but the white disc of the forewing is traversed l^y brown stripes. — hyllus subsp. nov. is extremely rare 
in Sumatra. 1 in the Coll. Frithstorfer, one $ in the Coll. Niceville are the only specimens known and 
ascertained. similar to the of vincula, with an imposing androconial area standing in a brownish-grey halo. 
boisduvali. Under surface with a more reduced white median area than in vincula and boisduvali. — boisduvali Moore 
(141 e), the name-type, originates from Java. I only found it near Sukabumi at an elevation of 6 to 800 m in 
the west of the island. Not very common. Moore knew $$ as we figure them. — In the east of the island 
oxyhts. and in Bawean there occurs a smaller race, oxylus subsp. nov.) $ without the white area of the forewing, in 
the place of which we only see a brownish-grey-scaled brightening at the cell-apex. The whitish places of the 
forewings beneath are, particularly in the $ from Bawean, also reduced and covered with grey. In Tijcls. v. 
Ent. 1912 p. 17. Prof. Courvoister reports that, according to a statement by Edw. Jakobson, Gerydus bois¬ 
duvali is myrmecophile and feeds from shield-lice which are bred by the species of ants Dolichoderus bituberculatus 
lombolcia- Mayr. — lombokianus Fruhst. Lombok, from the level coast districts up to 800 m. above without any white 
nus - spotting; that of the $ is dying away. Under surface darker than in specimens from Java, the discal stripes 
acragas. of the forewings reduced. — acragas Doh. from Sumba, Sumbawa and Flores in my collection from Timor in 
the British Museum. An interesting race occurring in two temporal forms being distinctly discernible in the 
female. The 9$ of the wet period resemble the 9 of G. boisduvali from West Java, only the white area at the 
cell-apex is smaller; $$ of the dry period resemble the $ of milvius from Sikkim with a narrow long white 
avitus. band of the forewing. -— avitus subsp. nov. we find in the Key Islands. considerably inferior to the $ of 
acragas, also with rounder wing-contours. The $ forms an intermediary between $$ of the rainy and dry periods, 
dioirophes. as they are before me from Sumbawa. — diotrophes Fruhst. From East Celebes. Both sexes of a more intense 
red-brown than the Macromalayan vicarious types. 9- with a more uniformly and more sharply defined transverse 
ceramensis. band of the forewing. Under surface lighter yellow-brown, with brighter white dashes. -— ceramensis Eibbe 
baruensis. from Ceram resembles above dossemus (141 e), though it excels it in size. — buruensis FI oil., according to the 
diagnose, seems to have a more extensive white cellular spot than ceramensis. It has remained unknown to 
dossemus. me in nature. •— dossemus Fruhst. (141 e) from Obi. Near to ceramensis Eibbe, but smaller, the small white 
stygianus. spot on the upper surface of the forewings prolonged. Under surface darker than in the Celebes-form. — stygianus 
Btlr., described from Ternate, in my collection from Batjan, Halmaheira, has a shorter and narrower whitish 
zone of the forewing than dossemus. The bands of the hindwings beneath are broader, more distinctly bordered 
cideus. with black. -— adeus Fruhst. from Fak-Fak (New Guinea), is the most closely allied to stygianus Btlr. from 
Batjan, but the subanal white spotting of the forewings beneath appears more extensive and the black median 
albotignula. lines of the hindwings are more intense. Type in the Coll. Adams of the British Museum. —- albotignula v. Eeclce 
was recently based upon a $ from the Island of Simalur. The white band of the forewing somewhat broader 
xeragis. and the under surface darker than in Javanese and Sumatran specimens. — xeragis subsp. nov. is allied to 
milvius (141 f) from Sikkim and forms the transition to boisduvali from Java, thd white part of the forewing, 
however, is broader than in albotignula, milvius and boisduvali. From the Island of Singapore. 
longeana. G. longeana Nicev. is a form as to which we are still doubtfull whether it may rightfully be called 
a species. of a more roundish wing-contour than G. boisduvali, whilst the $ in its size and colouring of the 
under surface entirely creates the impression of a dry period form of the latter species, longeana differs from 
all the boisduvali- forms by more extensive white parts on both wings. Its author believed that the form had 
no sexual mark whatever on the forewings. This is a mistake. The anterior median is not only thickened 
and nude, but also distinctly indented. Capt. Evans, moreover, boldly places longeana as a race of the dry 
Burmese zone to the collective species of boisduvali. 
courvoisieri. G. courvoisieri spec. nov. is an interesting species closely allied to G. boisduvali, of which a is in the 
collection of Prof. Coitrvoisier at Basies, the habitat being stated to be ,,Java“. <$ of a larger shape than 
G. boisduvali Moore, the shape of the wings more roundish. Under surface lighter than in boisduvali with a 
purely white, narrow oblique band resembling G. croton Doh., beginning beyond the cell and terminating at 
the inner margin. Hindwings faded yellowish brown with darker bands. 
