Collection of Madame Gaston Fournier. 85 
Cabirus linus dodona, Druce. 
Castna dodona, Druce, Ann, & Mag. Nat, Hist, (6) xvii. p. 218 (1896). 
1 g, Eeuador. 
Cabirus linus micha, Druce. 
Castnia micha, Druce, Ann. & Mag. Nat. Hist. (6) xvii. p. 217 (1896). 
14,1 2, Sapucay, Paraguay. 
Cabirus linus heliconoides, H.-S. 
Castnia heliconoides, H.-S. Sammi. ausseur. Schmett. p. 56, pl. xxviii. 
fic. 15 (1853). 
36 68,2 2 ¢, Rio de Janeiro, Brazil; 1 9, Brazil. 
Cabirus omissus, Rothsch. (Pl. IV. fig. 3.) 
Castnia (Cabirus) linus omissus, Rothsch. Noy. Zool. xxvi. p. 24 (1919). 
When Lord Rothschild described this as a subspecies 
of C. linus, Cram., he had before him but three specimens of 
C. linus—two from Dutch Guiana and one without locality,— 
while all his omzssus were from French and British Guiana. 
Madame Fournier has, however, a series of C. linus from 
French Guiana, taken at the same timeand place as the long 
series of C. omissus ; therefore there can be no question of 
omissus Deing a local race of linus. 
Dr. Jordan, who has been kind enough to examine the 
types in the Tring Museum for me, suggests that the 
difference between linus and omissus may be dimorphic, and 
his examination of the genitalia resulted in finding no 
difference between them except in the size of the penis- 
sheath, which he states may be due to contraction; two 
omissus and one linus were examined. 
For the present I have regarded omissus as a species; it 
would be interesting if Lepidopterists who possess long series 
of the southern and western races of C. linus would carefully 
examine them, in order to find if the omissus form occurs in 
all localities with it; up to the present I only find omdssus 
in Guiana and the Lower Amazon. 
Apart from the distinguishing characters given by Roth- 
schild, the nervules of the hind wing of linus are elothed 
with black scales—in omzssus this is not so. Also in linus 
veins 4 and 5 of hind wing are well separated where emitted 
from cell, and in omissus they are close together. 
2783, 72%, Lower Maroni, French Guiana; 1 g, 
Brazil ? 
