EUTRESIS.—TITHOREA. 9 
found in the mountainous parts of Eastern Ecuador; while the last, EF. imutatriz, 
originally obtained in Eastern Peru, extends its range into South-eastern Ecuador. 
These four species are all very closely allied to one another ; but the differences seem 
strictly associated with the areas where the insects are found. 
1. Kutresis theope. (Tab. I. fig. 3.) 
Eutresis theope, Godm. & Salv. P. Z.S. 1877, p. 60°. 
Eutresis hyperia, Staud. Verh. k.-k. zool.-bot. Ges. Wien, 1875, p. 96 (nec Doubl.)’. 
Alis anticis fusco-nigris, area interna hyalina, venis et linea irregulari submarginali divisa, macula triangulari 
discali fusca, area ven mediane fulva; posticis fulvis fusco marginatis area interiore hyalina, venis fulvis 
divisa: subtus velut supra, anticarum apicibus et posticarum marginibus albo punctatis. 
Hab. Costa Rica (Van Patten), Ivazu (Rogers!) ; Panama, Chiriqui (2¢bde?). 
Though several specimens of this species were contained in Van Patten’s Costa-Rica 
collection, described by Messrs. Butler and Druce (P. Z.S. 1874, p. 330), no mention 
of it is made in their paper. Dr. Staudinger refers to it as having been obtained by 
Ribbe in the vicinity of Chiriqui, when describing E. imitatriz. A fair series of 
specimens, including all four species, enabled us to discriminate E. theope from the 
Venezuelan E. hyperia; and subsequent examination of a still larger series has tended 
to show that the characters we pointed out are constant. Our figure is taken from 
one of Van Patten’s Costa-Rica specimens. 
TITHOREA. 
Tithorea, Doubleday, Gen. Diurn. Lep. i. p. 99 (1847). 
Femur of front legs of male longer than the coxa, tibia and tarsus together longer 
than the femur ; pencil of hair on costal area of secondaries in two patches. 
In addition to these characters, Tithorea may be easily recognized by its triangular 
primaries and pointed apex. The secondaries are also very round. The front legs of 
the female seem to be more nearly perfect than in any genus of this group; in one 
specimen we examined the claws were well developed, and, except for the smallness of 
their size, these legs were in no way atrophied. The genus has a wide range in tropical 
America, being absent, however, from South-eastern Brazil. Some of the most re- 
markable of the species are found in Colombia; and nearly all, including the most 
aberrent in coloration, are imitated by species of Heliconius found with them. Five 
species occur in Guatemala belonging to two forms, one of which is represented by 
two, the other by three races. 
1. Tithorea duenna. (Tab. II. fig. 7.) 
Tithorea duenna, Bates, Ent. Month. Mag. i. p. 56). 
BIOL. CENT.-AMER., Rhopal., Vol. 1, Sept. 1879. C 
