( 229 ) 



alike, or the first is the longest. In Trokles helena (L.), oblangomacidntus (Goeze), 

 etc., the basal portion of the median vein is obvionsly longer than that of the 

 subcostal nervure. 



This species has developed into four local forms : — 



(a) : T. amphrysus (Cram.) inhabits .Java, except the higher mountains, where 

 it is represented by 



(/*) : T. amphrysus cuneifer (Obertli.) ; 



(c) : T. nmphrysus Jiamcollis (Druce) occ'urs in Sumatra, ]Mala_v Peninsula, 

 Borneo, and I'anguey Island, and is replaced in the mountainou-; districts of 

 Sumatra by 



(d): T. amphrysus snmatranus (Hagen), which corresponds to T. amphrysus 

 cuneifer (Oberth.). 



The caterpillar and chrysalis are unknown. 



(a): T. amphrysus (Cram.j, forma typ. [(^,?]. 



(J. The yellow colour of the forewings varies in extent ; the submedian vein is 

 often entirely black. The submedian, linear, black mark on the upperside of the 

 hindwings, standing between the lower n\edian uervules, is mostl}- joined to the black 

 border of the wing, but in many individuals it stands separate, and sometimes it is 

 reduced to a point ; below it is often absent; in one of my specimens it is much 

 enlarged and parti}' merged together witluthe black abdominal margin ; in the same 

 example the black marginal spot at the end of the subcostal nervule of the hindwings 

 is extended along that vein half-way to the cell. 



The abdomen is yellow, with the upperside of the basal segments brownish ; or 

 it is greeni.sh yellow, with the whole upper surface brownish black, exclusive of the 

 lourth and fifth segments, which bear each a paler brown dorsal mark. 



The metathorax has, underneath the hindwings, rarely a few red hairs at each 

 side. 



5. The white markings on the forewings are variable in size, and assume 

 sometimes a yellowish colour towards the hinder angle. The yellow disc of the 

 hindwings shades mostly into whitish towards the base and the abdominal margin. 



The abdomen varies above from being dirty creamy buff to being olive brown ; 

 below it is yellow, or greenish yellow. 



(a'-'J : ab. pialabuanus Fruhst. 

 Ornithoptfra amphri/sits var. palabimnaFvnhsiorier, Ent. Xttrhr. p. 4-1 (IStU) (PaLibuan, S.W. Java). 



Adnervular streaks on the forewings darker than in typical amphrysus, almost 

 " reddish brown." 



Hah. .lava (IGJ 6, ¥). 



(fe) : (? ? . T. amphrysus cuneifer (Oberth.). 



(J. Ornithiiitirii amphrisiiis ab. rumifn-d ObortliUr. El. il' llnl. IV. p. 110. sub n. !l (1S79) (.lava). 

 (J?. Fapilio {(Jrnithn/ilcm) rilsetmip SnuUen, Xolfs Leyd. M"s. p. 1.5'! (1889) (Java; Preaiiger, 

 Ardjoena, 1500 to ISOO metres). 



This mountain-form of T. amphi-ijsus, which Sir. Oberthiir described as cuneife)' 

 from a single 7nale ten years before jMr. Snellen published it under the name of 

 ritsemne, cannot be maintained as a distinct species. Jlr. P. C. T. Snellen (I.e.) 

 dififerentiates cuneifer chiefly by the following characters : — 



<S. (1) 1'. cuneifer (= ritsemae Snellen) is smaller than ampJirysus (Cv:\m.). I lie 



