NASCUS. 321 



per cellulam altera discali : subtus fuscis, anticis ad basin posticis plerumqne obscure ocbraceo lavatis, 

 his transfasciatis sicut in pagina superiore. 

 $ alis fuscis; anticis ad basin posticis plerumque pallidioribus, anticis maculis undecem notatis, quatuor 

 in linea tranversa per cellulam, quinque inaequalibus subapicalibus (quarta a costa maxima) et duabus 

 submarginalibus, una vense medianse utrinque semihyalinis ; posticis fasciis duabus transversis fuscis 

 indistincte notatis : subtus ut supra, anticis ad basin posticis dimidio basali ochraceis, ciliis inter 

 venas albis. 



Hah. Mexico, Paso de San Juan in Vera Cruz ( W. Schaus) ; Guatemala, Chisoy 

 Valley (F. B. G. & 0. S.) ; Hondueas (Dyson, WittMgel in mus. Staudinger) ; Costa Eica 

 (Van Patten); Panama, Chiriqui (Bible), Volcan de Chiriqui (Champion), Calobre 

 (Arce). — South Ameeica generally, from Colombia and Guiana to South Brazil and 

 Paraguay. 



There can be little doubt that Hewitson's Eudamus pherenice is the female of 

 Cramer's Papilio jphocus, though the distribution of the hyaline spots on the primaries 

 is somewhat different ; those, however, which form the subapical series are alike in both 

 insects. Moreover, the two occur together throughout their range and are certainly of 

 opposite sex. 



The species seems subject to some variation, chiefly as regards the colour of the 

 wings beneath. Mr. Schaus's specimens are very pale ochraceous in this particular 

 part, and Honduras specimens are rather paler than others from Guatemala, but 

 they agree fairly well with a Paraguay example, and the difference is too slight to 

 be material. 



The genitalia of the male resemble those of Dyscophellus doriscus so far as regards the 

 tegumen, but the harpes have two separate patches of serrations on the dorsal edge, 

 with an interval in the middle between them. (See Tab. LXXVIII. fig. 19.) 



2. Nascus eugamon, sp. n. (Tab. LXXVIII. figg. 20, 21 6 .) 



iV. phoco similis et forsan ejusdem speciei varietas, sed alis obscurioribus maculis semibyalinis, primariorum 

 subapicalibus subsequalibus approximatis venis tantum divisis, posticis unicoloribus haud transfasciatis 

 distinguendus. 



5 adhuc ignota. 



Hab. Panama, Lion Hill Station (M^Leannan). 



We are in some doubt whether the single male specimen we possess from Panama 

 should be treated as a distinct species or as a variety of JV. phocus. The arrangement 

 of the spots on the primaries seems to justify its separation. The five spots forming 

 the subapical series lie close together in a uniform curve, are all elongated, and the 

 fourth from the costa is only slightly larger than the rest ; the spot beyond the second 

 branch of the median nervure is thrust further in between the adjoining ones, and the 

 spot below the first branch is altogether wanting. The secondaries above have no 

 transverse bands, and beneath the inner one is much abbreviated. 



biol. cente.-amee., Rhopal., Vol. II., November 1893. 2 t 



