CYM^ENES. — MNASEAS. 597 



Hob. Costa Rica, Cache, Irazu (Rogers) ; Panama, Chiriqui 1 2 (ex Staudinger).— 

 Colombia; Brazil. 



Dr. Staudinger has lent us the type of Pamphila berus— z, male from Chiriqui ,— 

 and we possess a long series from Costa Rica, as well as others from South America, 

 agreeing with it. C. berus is very like C. silius, but the secondaries are darker beneath, 

 and the fulvous band on the upperside of the primaries of the female is obsolete. 

 The Costa Rican examples have the underside of the primaries ochreous towards the 

 anal angle, and that of secondaries with a more or less distinct, attenuate, dark band 

 extending inward from the costal margin near the apex. The females appear to differ 

 from the same sex of C. malitiosa in the paler anal angle of the underside of the fore 

 wings. Dr. Staudinger has also sent us specimens of it under the names of Pamphila 

 silius, Latreille, from Brazil, and P. insidiosa, Mabille, from Chiriqui. 



We figure a typical male of C. berus from Chiriqui (Tab. CIIL figg. 7, 8) ; also a 

 brightly-coloured specimen of the same sex from Cache, Costa Rica (fig. 10), and the 

 genitalia of another example from the same locality, for which see Tab. CIIL fig. 9. 



MNASEAS, gen. nov. 



Thymelicus bicolor, Mab., from Central America, is taken as the type of this genus. 

 It is very like Mastor, but has a longer and more slender terminal joint to the palpi, a 

 shorter club to the antenna?, the brand on the primaries of the male more oblique, and 

 the genitalia in this sex totally different in form. Mnaseas would perhaps be better 

 placed near that genus, but in the form of the palpi it approaches Cymcenes. 



The antenna? are less than half the length of the costa, and have an elongate, stout, 

 gradually thickened club, terminating in a moderately long crook. The third joint of 

 the palpi is long, erect, and rather slender. The primaries are short and blunt at the 

 tip; the cell is much less than two-thirds the length of the costa; the discocellulars 

 are strongly oblique, the upper one much longer than the lower ; the lower radial is 

 depressed at the base ; the first branch arises before the middle of the median nervure, 

 the second close to the lower angle of the cell. The secondaries are rounded at the 

 anal angle ; the discocellulars are faint. The middle tibia? are spined, and the hind 

 tibia? have two pairs of spurs. The body is stout. The primaries of the male have a 

 very narrow oblique interrupted brand extending from the base of the second median 

 branch to the submedian nervure at about one-third from the base. 



l. Mnaseas bicolor. (Tab. cm. figg. 11, 12, 13, <y .) 



Thymelicus bicolor, Mab. Le Nat. 1889, p. 174, f. 4 l . 



Alls nitide tarns, stigmate concolore : subtus pallidiore, anticis costa et apice posticisque (nisi margine interno) 



ferrngineis ; palpis subtus griseis ; antennis subtus ad clavje basin flavidis ; ciliis sordide ochraceis 

 $ man similis : subtus alis obscurioribus. 



biol. cextr.-amer., Rhopal., Vol. II., February 1901. 4 H 



