1865.] 217 



Descriptions of some new species of DANAIN^. 



B V T R Y O .\ R E A K I R T. 



1. Ithomia Sosunga. n. sp. 



Male. — Fore wings almost as in I. Gonussa Ilewits., but the trans- 

 parent yellow patch within the cell is double what exists in that species. 

 Hind wings transparent, brownish; a large clear yellow Space on the 

 basal half of the abdominal margin, extending but slightly into the 

 cell, and over the second median vein, much more circumscribed in its 

 area than the similarly situated but differently colored spot in /. Go- 

 nussa, reaching, in no direction, as far as this; a marginal row of five 

 rounded and oblong white spots, smaller than in the allied species. 



Under surface mostly as above, with a bright ferruginous costal band 

 running half way down the anterior margin of the posterior wings. 

 Expanse 2.75 inches. 



Antenna} entirely black. 



Thorax and abdomen black, the first spotted with white in the usual 

 manner, the last with a double ventral white line, coalescing at the 

 insertion into the thorax, and at the anus. 



Hah. — Honduras. (In my Collection.) 



This fine species, in conjunction with /. Gonussa, might perhaps be 

 more appropriately placed under IL/moiitis, to the less extreme species 

 of which they very closely assimilate. Mr. Bates, in his invaluable 

 work upon the Amazonian ILliconufse, gives a list of ten species, (p. 

 538) which he considers as belonging to this genus, but does not in- 

 clude among them this species, \\hich, at the date of his publication, 

 was both figured and described. I have, therefore, relying upon his 

 better judgment, necessarily arising from much greater facilities of com- 

 parison, treated of the new and related species under the same head. 



In the general disposition of its markings, it is so nearly allied to 

 Gonussa, that it might by some P]ntomologists be considered as its 

 malr; but recollecting that amidst the crowd of delicate forms refera- 

 ble to this genus, we know of but one instance («/.se.) in which the 

 sexual disparity is strikingly observable, I have thought it best to treat 

 it as a new type. A great many new species have been indicated by 

 Dr. Herrich-Sclucffer in his " Lcpidopterorum index systematicus ' 

 Corbl. p. 175, 18(31, a large majority of which have neither been deli 

 neated nor diagnosed ; until this has been accomplished, they can in 

 no way conflict with identical species that may be described under 

 other names. 





