618 EHOPALOCEKA. 



primum valde exciso, maculis tribus in linea transversa subapicalibus, flavo-hyalinis ; posticis macula 

 minuta ad cellulae finem, tribus ultra earn apicem propioribus, infima maxima, coloris ejusdem : subtus 

 magis rubiginosis, maculis ut supra ; unco antennarum rufo. 

 2 ignota. 



Eab. Costa Rica, Irazu (Rogers). 



The single worn example described by us in 1879 is still the only one we know. 



LYCAS, gen. nov. 

 Hesperia argentea and H. ceraca, Hew., differ from nearly all the other American 

 Pamphilinee in the neuration of the primaries, and we are therefore compelled to place 

 them in a genus by themselves *. In some respects Lycas approaches many of the 

 Hesperiinae so closely that it would be almost as well placed in that group. It 

 resembles Aides and various other Tropical-American genera in having the underside 

 of the secondaries more or less clothed with silvery scales. The two species are both 

 widely distributed— L. argenteus ranging from Western Mexico to Brazil, and L. eeraca 

 from Panama to Brazil. 



The antenna? are very elongate, reaching nearly as far as the apex of the cell, and 

 have a long and rather slender club, terminating in a long crook. The palpi are 

 densely scaled, the third joint being very short, stout, and concealed. The primaries 

 are somewhat pointed at the tip ; the cell is two-thirds the length of the costa and 

 greatly produced at the apex ; the discocellulars are very oblique and in a line with 

 the third median segment, the upper one considerably longer than the lower, the latter 

 almost as long as the third median segment ; the lower radial is depressed at its base ; 

 the first branch arises before the middle of the median nervure ; the second median 

 segment is only about half the length of the first, and less than twice the length of 

 the third, which is unusually elongate. The secondaries are very slightly lobed at the 

 anal angle; the discocellulars are oblique and distinct. The body is robust. The 

 middle tibiae are furnished with short spines, and the hind tibia? have two pairs of 

 spurs. The primaries of the male are without trace of brand. The fore wing of a 

 male of L. argenteus is figured on Tab. CIV. fig. 29. 



l. Lycas argenteus. (Tab. civ. fi gg . 29, 30, <* .) 



Hesperia argentea, Hew. Trans. Ent. Soc. (3) ii. p. 487 (I860) 1 ; Exot. Butt. v. Hesmria, 

 fE. 46, 47 \ r 



Ahs fuscis, anticis ad basin et dimidio interno posticarum pilis ocbraceo-fuscis vestitis, anticis maculis tribus 

 in linea obliqua, una elongata ad venam submedianam, secunda majore inter ramos medianos primum et 

 secundum, tertia ultra earn, una in cellula externe excavata, punctisque tribus in linea transversa 

 subapicalibus, omnibus flavo-hyalinis ; posticis margine costali apicem versus et macula submar^inali 



* We possess a single male specimen, from Guiana, of an unnamed insect closely allied to Lycas but which 

 has a conspicuous oblique brand on the primaries in the male ; it belongs, however, to a different genus. 



