148 LEUCOTHYEIS. By B. Haensch. 



aquata. L. aquata Weym. (39 b), from Brazil, is similar to astraea, with narrower margins and bands. The 



obhque band at the end of the cell only extends a little beyond the inner angle. The black streak across the 

 middle of the cell is said to be of uniform width in typical specimens. Many examples, however, occur in 

 which it is wedge-shaped. 

 serdolis. In another species, which I call L. serdolis spec, no'v., a wedge-shaped oblique band runs from the 



end of the cell across the S'*^ median vein, and the vitreous spots are dusted with white. The pattern other- 

 wise the same as in astrea. This form flies on the Upper Amazon. 



Here begins the 2'^'^ principal group of Leucothyris with elongate, colourless wings, which bear delicate 

 whitish spots. Of these one at the distal margin of the forewing between the 2*''^ and 3'''^ median veins is especially 

 characteristic of the group, as it is placed so close to the distal border that the dark distal margin is always 

 narrowed here. There are two similar whitish spots at the apex of the forewing. The neuration of the hind- 

 wing is also very varied in this group. There occur both species with typical Hyposcada-Tiei\va.tion and also 

 very many in which the cell is considerably longer than in typical Leucothyris-species. 

 _ susiana. L. susiana Fldr. (38 g). This beautiful and rare species from the eastern Andes of Colombia and Ecuador 



has black wings with several rows of white vitreous spots. On the under surface the predominant colour is 

 red-brown. The forewing has at the base an oblong spot, then follow 2 rows of white spots before and behind 

 the end of the cell, and also 3 subapical spots and some white marginal dots. The hindwing shows in the 

 Susanna, disc a continuous white macular oblique band and large white double marginal dots. — susanna Stgr. is a very 

 similar form from Colombia Avitli smaller white spots and dots, but a broader yellowish oblique band on the 

 hindwing. 

 cyrene. L. cyrene Latr. is similar to susiana, from the Upper Amazon and Peru. The position of the vitreous 



spots is somewhat different. The middle spot of the first row is absent and the band of the hindwing is widened 

 radina. at the inner margin. — A nearly allied form from Colombia, which I call radina form, nov., has a double spot 

 in the end of the cell of the forewing and behind it 3 vitreous spots. The oblique band of the hindwing is 

 widened at the inner margin to the base. — Napeogenes domiduca Hew., from Bolivia, very closely resembles 

 the Leucothyris-ioTms now under consideration, but belongs to the genus Napeogenes, as I have only recently 

 been able to prove from typical specimens. It has a large basal vitreous area in the forewing and from the 

 end of the cell to the hinder angle a broad macular band, divided at the costal margin. Cf. Additions, p. 165. 

 attalia. L. attalia Hew. (38 g) has a black spot in the end of the cell of the forewing and numerous vitreous 



attalita. spots in the apical half. The species flies in Bolivia and Peru. — ■ attalita Hsch. is a much smaller form from 

 Bolivia. The vitreous spots have a strong milky colouring and on the under surface the yellow-brown colour 

 of attalia is here grey-brown. 

 taliata. L. taliata Hew., from Peru, has larger, contiguous vitreous spots in the disc of the forewing and a 



very broad vitreous band on the hindwing, as well as larger marginal dots on both wings. 



solida. L. solida Weym. (38 g). Here the vitreous spot between the 2"* and S''*" median veins in the discalmacular 



band of the forewing is the longest (in taliata it is the one between the P* and 2'"* veins). The large marginal 



dots are almost entirely absent. On the hindwing the vitreous band is narrower in the middle. — In ab. 



completa. completa Hsch., which flies with the type in eastern Ecuador, the costal margin of the hindwing is black to 



beyond the cell, so that the vitreous band is narrower. 

 orestilla. L. orestilla Hetv. (38 g) is the largest species of the true Ithomiids. The markings are similar to those 



of solida, with much larger vitreous spots. The third apical spot at the costal margin is absent. It flies in 

 the eastern Andes of Colombia and Ecuador in thick mountain woods near the tree-limit at elevations of up to 

 3000 m. 

 valida. L. valida Hsch., from the borders of Peru and Bolivia, is the same size as susiana and resembles coin- 



pleta, without the white marginal spots on the upper surface. The small white dot between the end of the cell 

 and the apex is in alignment with the two other subapical spots, and the vitreous spots at the hinder angle 

 are larger. 

 fasciata. L. fasciata Hsch., from the Upper Pastaza in Ecuador, is smaller, with narrow black costal margin to 



the hindAviug and spot across the end of the cell. It has a milky oblique band in the vitreous area of the hind- 

 wing, whilst in solida, which is otherwise similar, the whole disc is milky coloured. 

 deronda. L. deronda Hew. (39 a), from Peru and Bolivia, is distinguishable from the similar forms by the yel- 



lowish tinted forewing. In markings it is similar to the preceding forms, but the apex is much more narrowly 

 derondina. black, so that the two apical vitreous spots are not defined proximally. — derondina {Stgr. i. I.) is a much 

 smaller but otherwise extremelj- similar form from Bolivia with somewhat different neuration. The second 

 yellow spot at the costal margin of the forewing above is absent. The spot in the cell is narrower and in the 

 $ the black spot is absent in the angle which the median forms with its 1. branch. 

 cytharista. L. cytharista Hew., from Peru, probably also belongs here. It is of the same size as deronda and has 



yellowish forewing with dentate distal mai-gin and curved half-band across the end of the cell. The hindwing 

 has a bluish white tone and broad distal margin, strongly dentate proximally, with- large white dots. 



