EUDAMUS. 273 



the costal fold is the most trustworthy character to distinguish E. eurycles from that 

 species. 



b. Transverse diaphanous band of the primaries composed of more or less isolated 

 spots ; the spot between the median nervure and its second branch placed at a 

 distance from the rest. 



a'. The spot between the median nervure of the primaries and its second branch 

 narrow (or absent, as well as the band itself, as in E. chales). 



a". No transverse white band on the secondaries beneath. 



a"'. Tails short or truncate. 



2. E. doeyssus section. 



3. Eudamus doryssus. 



Papilio orion, Drury, 111. Ex. Ent. iii. p. 20, t. 17. ff. 3, 4 (nee Cramer) \ 



Eudamus doryssus, Swains. Zool. 111. ser. 2, ii. t. 48. f. 2 (1831) 2 . 



Goniurus doryssus, Plotz, Bull. Soc. Imp. Mosc. lv. No. 3, p. 16 3 . 



Goniurus brachius, Geyer in Hiibn. Zutr. ex. Schm. iv. p. 8, ff. 609, 610 (1832) \ 



Goniurus nivosus, Plotz, Bull. Soc. Imp. Mosc. lv. No. 3, p. 17? 5 . 



Alis nigricanti-brunneis ; anticis fascia transversa angusta, fere recta, venis quadripartita et macula ultra earn 

 elongata semihj'-alinis, punctis tribus aut quatuor subapicalibus ad costam ejusdem coloris ; posticis brevi- 

 caudatis, cauda et margine externo juxta earn (margine suo interno valde irregulari) cum ciliis pro majore 

 parte albis : subtus ut supra, posticis saturatioribus, margine externo fere toto albo (limbo suo interno 

 magis regulari), linea angusta ad angulum apicalem nigricante interrupta ; palpis fuscis, griseo intermixtis ; 

 plica costali obvia. 



$ mari similis, plica costali nulla. 



Eab. Mexico, Atoyac (H. H. Smith) ; Beitish Hondueas, Corosal (Eoe) ; Guate- 

 mala, Volcan de Santa Maria (W. B. Bichardson\ Pacific coast, San Geronimo (F. D. G. 

 & 0. S.), Panima (Champion) ; Nicaeagua, Chontales (Belt) ; Panama, Chiriqui (mus. 

 Staudinger). — South Ameeica generally to South Brazil. 



The descriptions and figures of Drury 1 , Swainson 2 , and Geyer 4 all apply to this 

 species as distinguished from E. albimargo and E. nigricauda, the inner edge of the 

 white border of the secondaries being very irregular on the upperside. In other 

 respects all these three forms are very much alike, E. chales differing from them all in 

 having no hyaline spots on the primaries. 



The range of E. doryssus is very extended, and though only found sparingly in the 

 Mexican State of Vera Cruz it spreads thence over the whole of Central America, 

 and over South America as far as South Brazil. In altitude it reaches an elevation 

 of 3000 or 4000 feet above sea-level. 



The tegumen of the male genitalia is cleft vertically, and the scaphium well 

 developed. The end of the harpagones is obtuse, and the upper angle terminates in a 



biol. cente.-amee., Khopal., Vol. II., May 1893. 2 N 



