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



closed, the uppei' radial originates with the 3rd subcostal vein from the same place. Colouring of the 5$ 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. 



amesis. A. amesis Cr. (= amosis auct., priolas Godt.) (127 b). (J above black, in the apical part of the fore- 



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

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

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

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

 streaks, before the margin of the hindwing j'ellow, black-pupilled eye-spots the apical one of which represents 



Upara. 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 amesis, on the whole with little differences; in the $ the two pupils 

 hcviiurga. 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 two 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 

 c?(? fly ^ow on broad roads through the forests; the $$ must be beaten out of the bushes. 

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



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

 before me. 

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



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

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



prema. A. prema Godt. (= smaragdifera Wiv.) (127 a). (^ 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: Miuiocastiiia gen. nov. 



Near to the Alesa, but both sexes of a much bulkier structm-e, the $ entirely different from the ^J. 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 hindwing very weak. The $ reminds us in the habitus of a Castnia of the pefosgr-us-group, and the remar- 

 kably bulky 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. rothschildi. 

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



marking, with 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 (J like that of the $, but without the white oblique band. From the Rio Demerara in Guiana, appa- 

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

 Museum. 



18. Genus: JTahida K 



y- 



This genus having been founded by Hewit.soic 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. 

 The forehead itself is white. Forewing with a very long cell, hindwing ^^'ith an extremely short one. With 

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

 an unwieldy flight. 

 coenoides. N. coenoides He2c. Wings dull glassy with s broad black margin being white-spotted in the fore- 



irochois. wing. It differs from the form trochois Hew. (127 b) by the absence of the rust-red anal spot of the hmdwing. 

 From Ecuador, Avhere the equally colom-ed Naj)eogenes glycera (35 g) and apulia (35 f) fly, the former without, 

 the latter vntii anal red in the hindwing. The species is apparently rare, but it may be also only difficult to 

 recognize, since in the same countries there also fly species of Ceratinia and Pteronymia which are similar to 

 the Nahida. 

 scrcua. N. Serena Sfich. (127 d) which we figure from Cachabe, looks very much different compared to 



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

 the margm broader, the white margmal spots are increased and enlarged. The models are presumably species 

 of Dismenitis or Hypoleria. 



