100 



HELICONID.E. 



first ; third and fourth shorter, the latter shortest ; the fifth nearly as long as the second, the 

 apex with a small blunt appendage, representing the claw ; first, second, and third joints with 

 a stout spine on each side at the apex. 

 Middle and Posterior Legs rather elongate, tibite spiny, the spurs distinct ; tarsi long, spiny all 

 round ; claws short, curved, deeply grooved below. Paronychia broad at the base, the outer 

 lacinia longer than the claw, narrow, strap-shaped, hairy ; inner one broad, triangular. 

 Pulvillus jointed, nearly as long as the claws, the second joint broad. 

 Abdomen elongate, scarcely if at all longer than the abdominal margin of the posterior wings. 



Larva and Pupa unknown. 



Tithorea may be known from Hcliconia by its more elongate and less distinctly clavate antenna?, by its broader and 

 more angular wings, and by the neuration of its posterior wings. The males of the species composing the first 

 section, which have many points of resemblance with Euplooa, have on the inner margin of the anterior wings below, 

 and on the anterior margin of the posterior wings above, a space covered with small polished scales, giving the surface 

 a silvery or selenitic lustre. They have also on the upper surface of the posterior wings, near the margin, a spot of 

 peculiarly formed scales covered by a tuft of long appresscd hairs. Those of the second section have two of these sexual 

 marks on each wing. 



The genus is divisible into two very distinct groups, one of which apparently is peculiar to the more western parts 

 of the north of South America, the other to Northern Brazil, Venezuela, and the West Indian Islands. 



TITHOREA. 



Section I. Eyes hairy, tibial of middle and posterior tegs much 

 longer than the femora. 



1. TlTH. HuMBOLDTII. 



Hel. Hum. Latreille, in Humb. et Bonp. Obs. 

 Zool. et Anat. Comp. t. 18. f. 1, 2. (1811- 

 19). 

 Godt. Enc. M. ix. 224. n. 64. (1819). 

 New Granada. B. M. 



2. Tith. Bonplandi Doubleday S; Hewitson, t. 14. f. 1. (1847). 



Hel. Bonn. Gm'rin, Icon, du Iiigne Anim. texte, 

 n. 472. (1829-44). 

 New Granada. B. M. 



3. Tith. Pavonii Soisd. MSS. 

 Guayaquil. 



B.M. 



Section II. Eyes smooth, tibia of middle and anterior leys not 

 much longer than the femora. 



4. Tith. Irene. 



P. Ir. Drury, in. t. 38. f. 1. (17S2). 



Fab. Syst. Ent. in. i. 165. n. 510. (1793). 

 Melinaea Ir. Hiibn. Vers. belt. Schmett. (1816). 

 Hel. ? Ir. Godt. Enc. M. ix. 225. n. 60. (1819). 

 Jamaica. B. M. 



5. Tith. Megara Doubleday % Hewitson, t. 14. f. 2. (1S47). 



Hel. Meg. Godt. Enc. M. ix. 223. n. 59. 

 (1819). 

 Para, Antilles. B. M. 



6. Tith. Tyro. 



Hel. Ty. Klug MSS. 

 Venezuela. B. M. 



Note. P. Harmonia Cram. 1. 1 90. f. C, which both Fabricius and Godart consider to be identical with the P. Mneme of Linne, 

 appears rather to belong to this genus than to Mechanitis, and may be a variety of Tith. Megara ; but as Cramer only figures the under 

 surface, and as that differs from all the varieties of Tith. Megara which I have seen, I have not ventured to adopt Cramer's name instead 

 of Godart's. Cramer's insect certainly is not Mechanitis Mneme. 



