ITHOMEIS; TMETOGLENE. By Dr. A. Seitz. 653 



19. Genus: Itliomeis Bat. 



This genus is hardly to be separated from the preceding; the differences stated (for instance in the 

 veins) are very slight, some are also erroneous. The third palpal joint is said to be in Itliomeis coniform, in 

 Nahida knob-shaped. Indeed some ItJiomeis exhibit the terminal joint of the paJpus just as obtuse as the Nahida. 

 Maybe that the forewing of the Itkomeis is not quite so round a^s it is in the latter. Moreover, we maj con- 

 clude a certain alliance already from the mimicry common to both genera.. There are about a dozen of forms 

 known, the models of which are generally Ithomiins, a fact being expressed already by the name. 



I. aereila Sm. (127 b). Wings with a dull glassy disc and broad black margins filled up ^^ith red-brown, aerelta. 

 In the fore^^ing a white oblique band. Peru, Bolivia; not very rare. 



I. astrea Fldi'. (127 c). Quite similar to aereila, but larger, in place of the white oblique band we astrea. 

 notice on the forewing an irregular, cmved vitreous band. Before me only from Peru, but described from Vene- 

 zuela. — In delecta Stick, from South Brazil (Blumenau) or Venezuela the marginal band is said to be more deUcta. 

 filled up with brown and the vitreous spots of the subapical band of the forewing are more isolated. — heliconina heliconina. 

 Bat. (127 c) is an equally coloured species, but smaller, the vitreous areas are reduced and beneath lacteous; 

 from the x4.mazon and Peru. There are transitions to typical astrea, as heliconina varies greatly at any rate, 

 so that for instance the brown filling in the margin of the wings may disappear nearly altogether. The appea- 

 rance of the astrea-ioxms, presumably conforms with the species of Leucothyris and N apeogenes flying at the 

 same habitats. — satellites Bat. has the size of heliconina, but the subapical vitreous band of the forewings .satellites. 

 being regular there is irregular here, being strangulated in the middle, the spots of the forewings almost white; 

 from the Rio Tapajoz. 



I. mimica Bat. (= corinna Stgr.) (127 c). This form is likewise connected with the preceding by mimica. 

 transitions. It is characterized by the lacteous discal spots and the very broad orange distal band. From Co- 

 lombia to Ecuador. It imitates Napeogenes of the corena-group, just like the following. 



I. corena Fldr. (127 c) from Colombia differs from the preceding by its larger size, a broader orange corcna. 

 spot at the inner margin of the forewing, and by the orange band of the forewing being broader than that of 

 the hindwing, while in Tiiimica it is just the reverse. Beneath the vitreous spots are almost as transparent as 

 above, scarcely powdered with white. The species varies enormously in size and may drop from the size of 

 an astrea down as far as to a small heliconina. The orange band may also be lighter yellow or more brownish 

 red, continuous or interrupted. Where it is separated to a large subapical spot, as on the Upper Rio Negro, 

 a resemblance is created with Stalachtis lineata being imitated according to the same model. 



I. stalachtina Bat. As the name implies, this species also resembles a Stalachtis (duvali) and is imme- stalachiina. 

 diately recognizable by this similarity. Probably from the Upper Amazon. As the orange colouring is shifted 

 to the hindwing, also a second.arj' resemblance is produced with the Pierid Dismorphia lysinoe (30 d). 



I. aurantiaca Bat. Recognizable by the greater extent of the orange colouring on all the mngs, other- auraniiaca. 

 wise belonging to the corewa-group. Am^azon District. Apparently very rare. It is besides recognizable by 

 its resemblance with Napeogenes ercilla and Hyposcada illinissa. The distribution of colours is about as in 

 Napeog. cyrianassa, but the subapical spots of the forewings are lighter and clearer. 



I. eulema Heiv. (127 d). In this species the hindwings are red-brown with a broad black, white-dotted culema. 

 distal margin. In the forewing only a broad longitudinal stripe above the inner margin is yet yellowish-brown, 

 the other part being black with white dots and diffuse spots. Colombia. — imitatrix G. and S. (127 c) is the imitatrix. 

 form of the adjoining Costa Rica and Panama, in which the forewings are without red-brown, entirely black, 

 marked with but few white small streak-like spots. Both the forms thus approximate a coloming found in 

 the Pieris Charonias eurytele (21 e) in Colombia or Ch. lyceas in Panama or intermedia Schs. from Costa Rica. 

 The resemblance, however, is secondary, created by both having been copied according to the same model. 

 This model is to be found among the numerous equally coloured Ithomiins to which belong for instance J/e- 

 linaea menatis (33 d), Napeogenes larina (35 e), Ceratinia callispila (35 a), CaUithomia hezia (36 b), Ithomia 

 plaginota or celemia (37 b, c) and many other butterflies. 



20. Genus: Tmetoglene Fldr. 



The species of this genus likewise imitate the Ithomiinae, but onlj^ hyaline species, especially those 

 from the genera Ithomia Hypoleria, Pteronymia etc. They resemble the patented genus of night-butterflies 

 Brachyglene H.-Schaff., according to which Fblder had originally denominated them, only in the shape, not 

 in the colour. From the species of the preceding genus they are immediatelj'' distinguishable by the short cell 

 of the forewing which is little longer than that of the hmdwing, while m the Itliomeis it is a.bout as long again. 

 The species fly little and are mostly not common; there are about 5 or 6 species known with a range exten- 

 ding from Mexico to South Brazil and Bolivia. 



