142 ITHOMIA. By R. Haensch. 



diasia. I. diasia Hew. (37 f) is a similarly marked species, without the striking forewing of the (^(J, with glossy 



bluish winces margined with black. On the under surface the margins in this species are also black in exceptional 

 cases except for the costal margin of the hindwing, which is brown and at the base yellow. 



ossuna. As I. ossuna spec. nov. I designate an interesting species from Colombia, which is similar in pattern and 



colouring to the preceding species except for the distal margin of the forewing. This is much widened before the 

 inner angle and red-brown. 

 hippocrenis. !• hippocrenis Bates, from southern Central America, is similar to diasia, but has a much broader spot 



at the end of the cell of the forewing and also a white patch, as well as red-brown margins on the under surface. — 

 niorena. niorena H.sch. is another similar form from western Ecuador. The wings are colourless; the markings as in diasia, 

 onlv tlie half-band in the cell is reduced, and the margins are beneath red-brown with dark edges. 



aelia. I. aelia Hew. (= centromaculata Weym.)_ (37 g) has whitish-dusted forewing with dark margins and 



veins, as well as l)road band across the end of the cell of the forewing. The hindwing is light red-brown with 

 dark costal and distal margins. This rare species flies in Eastern Colombia. 



jucunda. !• jucunda Godm. <& Salv., from Panama, has similar forewing, but colourless hindwing with broad, 



black-brown distal margin and a red-brown spot in it near the inner angle. The species thus recalls ossuna and 



nalata. is distinguished by the absence of the half-band in the cell of the forewing. — galata Hew., from Colombia, is 



also similar, with narrower band at the end of the cell of the forewing, and moreover yellow-brown, dark-edged 



distal margin to the hindwing. 



patilla. !• patilla Hetv. {= psyche Bates) (37 f), from Central America, has a black-brown apical half to the 



forewing with a large white subapical patch; the base and the hindwing are colourless, with dark red-brown 



leila. margins. — leila Hew., from Mexico, is larger, with broader bands and spots, and white dots in the apex of the 



forewing and at the distal margin of the hindwing. 



termtm '• ^^^^^ ^'^"'- ('^'^ ^)' ^^ ^'^^^ ""^ lerrana Hsch. and a third form, which I call vulcana form. nov.. may be 



vulcana. recognized by the broadly dark-margined veins at the end of the cell of the hindwing. terra is one of the most 

 widely distributed and commonest Ithomias; it occurs in north-western South America, from Colombia and 

 Venezuela to Bolivia. The wings are transparent, shiny bluish, with triangular, black spot at the end of the 

 cell of the forewing and small white spots near it at the costal margin. The black margins of the upper surface 

 are beneath red-brown with dark edges. Whilst terra occurs in the eastern part of the Andes in Ecuador, the 

 smaller terrana is found in the west. The wings in this form are colourless, with broader margins and large, white 

 patch at the apex of the forewing. On the under surface the colour of the margins is yellow-brown, vulcana, 

 from Costa Rica, has the colouring as terrana, with narrower, black-grey margins and smaller white patch. In 

 size it is intermediate between terra and terrana. On the under surface the margins are yellow-brown with fine, 

 dark border. The scent-spot of the S in vulcana is yellow-brown, in the other two forms black-brown. 



derasa. I. derasa Heiv. (= melhlla Weym., soligena Weym.) (37 f) has dark-shaded veins at the end of the cell 



of the hindwing, like the very similar Napeogenes lamia and Scada ethica, which species likewise have yellow- 

 dusted wings, derasa was described by Hewitson from Nicaragua. But I find no difference between it and the 



travella. form described from eastern Ecuador by Weymeb as soligena. — From thence also comes travella Hsch., which 

 is similar to the preceding; but the dark marking at the end of the cell of the hindwing is absent and the band 



salapia. at the end of the cell of the forewing is broader. — salapia Heiv. (37 f) has the wings more weakly dusted with 

 yellow and broader, black margins, without white dots in the anal margin and with red-brown central line in 

 the margins of the underside. 



drymo. I. drymo Hbn. (= diaphana Cr., phono Geyer) (37 g cj, ?) is a small, inconspicuous species, common 



in Brazil, with colourless, dark-margined wings and broad half-band across the end of the cell of the forewing. 



At the costal margin follows a small, white spot. In the $ the margins are somewhat broader and across the 

 napho. end of the cell of the hindwing is placed a triangular, dark spot. — napho H.-Schdff. (= phono Hew. p., naxo 



Oherih.), from Colombia, is a very similar form with slightly smoke-brown wings and without the spot at the 

 pellucida. discocellular of the hindwing in both sexes. — pellucida Weym. is also a very similar species with longer oblique 



band at the end of the cell of the forewing. It is said to occur both on Trinidad and in Brazil. 



agnosia. I. agnosia Hew. (37 f), from Colombia and Venezuela to Peru, is a common species with similar markings 



to the preceding, but distinguishable by the large, white patch at the end of the cell of the forewing. 



pseudo- I_ pseudo-agalla Reb. (37 g), from western Ecuador, has smoke-brown wings with dark margins; yellow 



spot at the end of the cell and yellow-brown median vein on the forewing. 



oenanihe. I. oenanthe Weym. (37 g) has more pointed forewing with brownish margins, which are vivid yellow- 



brown on the under surface. The half-band at the end of the cell of the forewing is pointed. It flies in the Cauca 

 Valley of Colombia and is closely allied to terra, 

 salcala. I. salcata Schaus, from Colombia, is said to have transparent, whitish wings, with black-brown veins 



and margins. Forewing sparsely scaled with white at the end of the cell and the costal margin. On the under 



