652 MIMOCASTNIA, NAHIDA. By Dr. A. Seitz. 



closed, the uppc radial originates with the 3rd subcostal vein from the same place. Colouring of the $$ earthy 

 brown, that of the (J (J varying, but with a metallic lustre. Only few species all of which are found in the eastern 

 part of South America. 

 aiiicsi.1. A. amesis Cr. {= amosis <vuct.. priolas Godt.) (127 b). (J above black, in the apical jiart of the fore- 



wing with yellowish grey streaks; from the distal margin of all the wings, a violettish blue reflection extends 

 variously far into the wing, being ])romincnt only in certain exposure to light, so that the reflection is much 

 more difficult to see than, for instance, in the quite similarly coloured Evselnsia tarinda; in some specimens 

 the reflection seems to be absent altogether. $ light brown with dark bands. Apex of the forewing with yellow 

 streaks, l)efore the margin of the liindwing yellow, black-pupillcd eye-spots the apical one of which represents 

 lipara. a fused double eye-spot. — lipara Bat. (127 b) has rounder hindwings, weaker streaks in the apical part, 

 the forewing is beneath of duller colours than ainesis, on the whole with little differences; in the $ the two pupils 



lirm'iurga. of the apical eye-spot are not so closely fused, but still separated. • — hemiurga Bat. has a lighter distal part 

 of the wings in the ^ and smaller dark spots in the $. The latter tv\o forms on the Amazon, and the 

 typical form in Guiana. ■ — Of a very deviating impression are (^^ exhibiting instead of a violettish blue reflection 

 a greenish grey metal-gloss; such a specimen is in the Paris Museum. — In Guiana the animal is common; the 

 (J(^ fly low on broad roads through the forests; the $$ must be beaten out of the bushes. 



hchidrUiK. A. helydrias Bat. Similar to the preceding, but smaller and above all distinguished by the ^ resem- 



bling the $, the marking of the under siu'face showing distinctly through above. Tapajoz. The species is not 

 before me. 

 ielcphac. A. telephae Bsd. (127 a). Only the $ is known; it differs from the $ of amesis by a less marked 



forewing and by the apical eyespot-pupils of the hindwings showing above a magnificent bluish-green reflection 

 as in the following species; this reflection, however, becomes prominent only in a certain light. Amazon. 

 prciiia. A. prema Godt. (= smaragdifera Wtc.) (127 a). (J of a magnificent emerald-green, in another light 



of a deep blue reflection, with black markings. $ similar to that of the preceding species, larger, the eye-spots 

 of the hindwings and some spots near the base of the forewing with metallic pupils. Colombia and Amazon; 

 (J (J from Colombia (from the Rio Negro) exhibit above in the median area of both wings thicker black markings. 

 Rare. 



17. Genus: Miiiiocastiiia 



gen. nov. 



Near to the Alesa, but both sexes of a much bulkier structure, the 5 entirely different from the ^. The 

 former resembles Alesa prema in the marking of the upper surface, the body more robust, the palpi thicker, 

 with a projecting terminal joint, wings shorter, more obtuse with a very round margin, the lower discocellular 

 of the liindwing very weak. The $ reminds us in the habitus of a Cktstnia of the ■pelasgus-gvo\x\i. and the remar- 

 kably bvilky structure of the body may serve for completing the mimetic resemblance, but this may be secon- 

 dary, the original for both may be an Arctiid secreting oil. Type: M . rofhschildi. 

 roihschitdi. M. rothschildi nom,. nov. ($ = plagiaria Godm. nee Sm.) (127a). ^ above with a black lattice-like 



marking, witii golden green spots, the marginal spots guttiform. $ above black except the distal half of the 

 forewing in which there is a white oblique band, and the margin of the hindwing of a blue gloss. Under sur- 

 face of the (^ like that of the $, but witliout the white oblicj^ue band. From tlie Rio Demerara in Guiana, appa- 

 rently very rare; I know only a couple in the Tring Museum and one 9 in the Coll. Godman in the British 

 Museum. 



18. (it'iuis: J^ahitla Ky. 



This genus having been founded by Hewit.son by the hackneyed name of Threnodes comprises 2 mimetic 

 species of a bulky structure of the body, with very round broad wings, long antennae scarcely thickened at 

 the ends, and the palpi being bent up before the forehead, though hardly reaching the middle of the forehead. 

 Tiie forehead itself is white. Forewing with a very long cell, hindwing with an extremely short one. With 

 respect to the habits nothing is known to me; they evidently imitate Ithomiins and have probably therefore 

 an unwieldy flight. 

 cocnoidcs. N. coenoides Hew. \\'ings dull glassy with v broad black margin being white-spotted in the fore- 



trorhois. wing. It differs from the form trochois Hen\ (127 b) by the absence of the rust-red anal spot of the hindwing. 

 From Ecuador, where the ecj[ually colomed N a'peogenes glycera (35 g) and apvlia' (35 f) fly, the former without, 

 the latter with anal red in the hindwing. The species is apjjarently rare, but it may be also oidy difficult to 

 recognize, since in the same countries there also fly species of Ceratinia and Pteronynda which are similaii' to 

 the Nahida. 

 scrciia. N. serena Htich. (127 d) which we figure from Cachabe, looks very much different compared to 



the preceding, but perhaps only owing to the mimicry of another model; here the disc of the wings is orange, 

 the margin broader, the white marginal spots are increased and enlarged. The models are presumably species 

 of Dismenitis or Hypoleria. 



