24 NOVTTATES ZOOLOOICAE XXVI. 1919. 



Castnia (Cabirns) linus (Cram.) 



Papilio linus Cramer, Pap. Exut. vol. iii. part xxii. p. 111. pi. cclvii. fig. A (1779) (Surinam). 



Of this form we have at Tring 3 specimens : 



2 S3 Surinam (ex coll. Van Lennep, ex coll. Fclder) (Cramer's cotypes 

 probably) ; 1 (J ?. 



Monsieur Houlbert has united to liniis linus specimens from French Guiana, 

 the Amazons, and even Matto Grosso. I find that not only is this incorrect, 

 but that even French Guiana specimens of which I have 6, and British Guiana 

 ones of which I have 2, show important differences. All these 8 specimens 

 differ from my 3 Surinam specimens in two important points, (1) the basal one- 

 fourth of forewing and the yellow semivitreous median band are much lighter, less 

 suffused with dark scales, and (2) in Surinam specimens the 2 first spots of the 

 submarginal line of spots on the hindwing only are large and elongate, the rest 

 are small ; in the British and French Guiana specimens there is an extra spot 

 nearer costa, and of the rest 4 are very large and elongated, while the rest are 

 minute and semi-obsolete. I therefore describe them as follows : 



Castnia (Cabirus) linus omissus subsp. nov. 



Differs from linus linus on forewing by the basal area and median band of 

 forewings being lighter, brighter and less suffused with black scales, and in the 

 submarginal row of spots having an extra subapical one, while of the rest 4 as 

 opposed to 2 are very large and elongate, being also larger than in linus linus. 



4 (J(J, 2 ?? Gourdonville, Kouron River, French Guiana, September 1905 

 (E. Le Moult) ; 1 ^, 1 $ British Guiana. 



Castnia (Cabirus) linus obidonus subsp. nov. 



This is distinguished from I. omissus and I. heliconoides by its great size, 

 especially in the $, and in the submarginal spots on the hindwing, which are 

 very large and have the 1st, 2nd, 4th, and 5th very large and oblong, while the 

 3rd is small ; and also by the very wide black outer portion of wing in which 

 these spots stand. 



Length of forewing : ? 56 mm. Expanse : 121 mm. 



1 (J, 1 $ Amazon (Bates, ex coll. Felder) ; 2 (JJ, 1 $ Obidos, August 1906 

 (W. Hoffmanns) (? tjpe). 



Castnia (Cabirus) linus subsp. ? 



The Tring Museum possesses 1 cj, 1 $ of a form of linus which differs from 

 obidonus in several particulars, but the material is insufficient for a proper 

 diagnosis, especially as the localities appear incorrect. 



1 (J labelled Honduras ; I ? labelled Bolivia (bought of Watkins and Don- 

 caster). 



Castnia (Cabirus) linus micha Druce 



Catnia micha Druce, Ann. Mag. Nat. Hist. (6) xvii. p. 217 (1896) (Paraguay). 



1 (J Buenavista, East Bolivia, 750 m. = 2,438 ft., August 1906— April 1907 

 (Jose Steinbach) ; 1 ? Sta Cruz de la Sierra, E. Bolivia, 1905—1906 (Jose 



