ONOPHAS. — CEONUS. 539 



spined, and the hind tibise have two pairs of spurs. The primaries of the male have a 

 very narrow, linear, oblique, interrupted brand, extending from the base of the second 

 median branch to below the first, at some distance from its point of origin, and in a 

 line with this, above the middle of the submedian nervure, there is a transverse fold. 

 The genitalia of the male are very peculiar in form. 



1. Onophas columbaria. (Tab. XCVIII. figg. 34-37, s .) 



Pamphila columbaria, Herr.-Schaff. Corresp.-Blatt Regensb. 1870, p. 159 \ 

 Pamphila flossites, Butl. P. Z. S. 1873, p. 687 \ 



Alis fuscis ad basin et corpore supra viridi-casruleis, stigmate nigrescent© ; anticis maculis duabus indishnctis 

 inter ramos medianos, proxima majore, sordide flavis : subtus ochraceis, anticis area mediana fusca, 

 maculis paginaa superioris et altera elongata infra eas albidis ; posticis striga a basi posticarum angulum 

 analem versus eunte, flavidis ; subtus palpis et thorace cseruleo-albis, abdomine albo. 

 $ mari similis. 



Hab. Panama (.Ribbe, ex Staudinger).—VEmzmhA; Guiana; Amazons 2 ; Brazil 1 ; 

 Trinidad. 



Eleven examples of this distinct species are before us, three being from Panama. 

 0. columbaria may readily be distinguished from all the allied forms by its peculiar 

 coloration— the body, head, and base of the wings being bright blue, and the second- 

 aries ochreous beneath. Dr. Staudinger has sent us examples of this insect under the 

 name of Pamphila columbaria, Herrich-Scbaffer, and we have accepted his determination 

 as correct. For the genitalia of the male, see Tab. XCVIII. fig. 37. 



(EONUS, gen. nov. 



The single species from Mexico from which the following characters are taken is 



nearly related to Onophas and Perimeles, having a somewhat similar brand in the 



male ; but the genitalia in this sex are totally di>similar in structure, and the neuration 



of the primaries also differs. Hesperia degener, Plotz, from Venezuela ?, also probably 



belongs here. 



The antennas are about half the length of the costa, and have a rather stout club, 

 terminating in a long crook. The third joint of the palpi is short and bluntly conical. 

 The primaries are produced, and are somewhat pointed at the tip ; the cell is much 

 less than two-thirds the length of the costa ; the discocellulars are strongly oblique, 

 the upper one more than four times the length of the lower, the latter very short, 

 being about half the length of the third median segment and almost in a line with it ; 

 the Tower radial is greatly depressed at the base ; the first branch arises considerably 

 before the middle of the median nervure, the second not far from the lower angle of 

 the cell. The secondaries are produced at the anal angle; the discocellulars are 

 oblique and very faint. The body is moderately robust. The middle tibise are spined, 

 the hind tibia? have two pairs of spurs. The primaries of the male have a conspicuous 



