EURYBIA. By Dr. A. Seitz. 635 



here are mostly small, we were able to offer such a complete illustration that one will easily find one's way, 

 as nearlj^ all the chief forms have been depicted. We have already told in the preface to the family the little 

 we know about the early stages and the habits. 



5. Genus: JEurybia Hbn. 



This genus contains 37 forms of butterflies partly belonging to the largest of the whole family. The 

 body is very slender, the head small, the thorax long, the abdomen in both sexes bilaterally compressed, thin 

 and pointed. The -ndngs are entire, the hindwings with a round border, only in a somewhat deviating group 

 the forewings are pointed falciformly at the apex. The ground-colour is above dark browai, the border of the 

 hindining often with a ruddle-red tinge. Only in one case the wing is traversed by a broad white band, i. e. 

 in a species flying together with just the same banded species of other genera (Mesosemia). The forewings 

 Mostly exhibit at the cell-end an eye-spot or ring-spot. 



Head broad, forehead broad and flat, eyes of medium size, naked, slightly convex, palpi bent up in 

 front of the face, not projecting, but often brightlj'' coloured; second joint more than twice as long as the first 

 one, the third a minute knob. Antennae very long, reaching about two thirds of the costa.-length, thin, at the 

 ends scarcely thickened. Thorax slender, legs short, the legs on being stretched out scarcely reach the anrts; 

 abdomen long and slim, mostly extending considerably beyond the anal angle. Wings broad, in the forewing 

 the subcostal is 5-branched, the submedian bifurcated at the base, the cell broad, cuneiform, of different shapes, 

 at the end sometimes more straightly cut off, sometimes angled laciniformly. The hindwings are sometimes 

 slightly angled between the upper and middle radial-ends. 



The Eurybia are distributed from Mexico to South Brazil and Bolivia. They are met singly in the 

 woods where they dance about playing on broad roads, as I have already fully described in 1889 in the ,,Stettiner 

 Zeitung". Larva and food-plant are unknown. One nowheres finds more than 2 or 3 species at most of the 

 genus, whereas the local subraces are often very limited in space. One sometimes needs only to walk some 

 kilometres away from a flying-place, in order to discover already a difference in the species occurring there. 

 Of course one cannot speak of subspecies then, nor can one denominate all these local races without getting 

 beyond one's depth. 



E. Carolina Godt. (123 b). This species has a pointed falciform apex of the forewings and an angled caroUna. 

 border of the hindmngs. One of the largest Eurybia; the discs of all the wings are traversed by a series of spots 

 being partly vitreous, partly ochre-yellow. The size of the vitreous spots varies a great deal, but it is mostly 

 constant in specimens of the same finding-place. South Brazil, especially Sa. Catharina, not common, resting 

 beneath large leaves; its flight somewhat resembles that of Emesis fastidiosa (136 d) flying at the same place. 



E. pergaea Hbn.-G. (123 b). This is the second species with a falciform apex. Smaller, unicolorous pergaea. 

 grey without the macular series of the former species, only behind the upper cellular angle a white small, dot- 

 like vitreous spot and sometimes another smaller one behind it. Likewise known from Soath Brazil, where 

 the species, however, is not common; but it is probably more widely spread in South America. 



E. nicaeus F. (123 b). As typical nicaeus I consider the small form from the upper Amazon, as it nicaeus. 

 flies quite similarly in Venezuela. The eye-spot at the cell-end is comparatively small, the hindwings are all 

 over suffused with ruddle-red. — salome Cr. (123 b) from Guiana is somewhat larger, the distal part of the salome. 

 hindwing of a brighter red, both wings on both sides with somewhat brighter spots, the eye-spot of the fore- 

 wing larger. • — In erythinosa*S<ic/j. from Ecuador and Colombia the red is reported to cover half the hindwing. — erylhinosa. 

 South Brazilian specimens have a dull, though most beautiful violet lustre on the hindwings. In Sa. Catharina 

 the species has yet the size of saloine, and the dark submarginal spots of the hindwings are in broad red rings, 

 proximally with a broad red tinge and sometimes with black cuneiform spots (molochina Stick.), sometimes molodnna. 

 without them (diffusa Stick.). Still farther to the south the form is again of the size of typical nicaeus and diffusa. 

 the violet reflection grows very intense, whereas the red of the distal half of the hindwing is darkened. But 

 this varies, like in other Erycinidae, almost with every geographical mile. Specimens from the Monte Corcovado 

 near Rio de Janeiro (= hyacinthina Stick.) (123 c) are always larger and redder than those from the iovestsJiyacinthina. 

 to the south of that town (their forewings measvuring not more than 24 mm, while the Corcovado-(J(J have 

 exactly 26 mm), whereas all the specimens found at one place exhibit the most exact likeness in size and colour- 

 ing. We figure a ^ from the Monte Corcovado and one which I took near Santos, and -ne can distinctly per- 

 ceive the difference being absolutely constant (there are series of both the habitats before me): Stichel's 

 hyacinthina is presumably based on one of these forms. 



E. dardus F. (= upis Hbn.) (123 c). The name-type is nearly the smallest of the whole, very long dardus. 

 series of forms. Differing from the former by a much larger, jet-black eye-spot of the forewing, with a light 

 ring around it, and by the absence of the red at the border of the hindwing. Between the eye-spot and the 

 submarginal series of ring-spots, another distinct whitish series of dots is inserted. Guiana and the Amazon 



