270 EHOPALOCEKA. 



a. Hind tibiae with two pairs of spurs (except in Tarsoctenus and Casyapa, which 



have peculiar antennae). 



a'. Terminal joint of the palpi minute. 



EUDAMUS. 



Eudamus, Swainson, Zool. 111. ser. 2, ii. t. 48 (1831); Watson, P. Z. S. 1893, pp. 16, 20. 

 Polythriw, Watson, P. Z. S. 1893, pp. 16, 19. 



The type of this genus is Papilio proteus, Linn., one of the commonest and most 

 widely distributed of the Hesperiidse in Tropical America. 



The antennae are bent to a hook just beyond the thickest part of the club, and then 

 taper to a sharp point. The male usually has a costal fold, which, however, is absent 

 in some species specified below ; the cell of the primaries is very long, the discocellulars 

 oblique, and there is a recurrent nervure from the median a little before the end of the 

 cell ; the second, third, and fourth segments of the subcostal are subequal ; the second 

 segment of the median is more than twice as long as the third ; in the secondaries the 

 submedian is produced to form a tail of varying length ; the discocellular meets the 

 median at the origin of the second branch. 



E. zilpa and its immediate allies are aberrant, inasmuch as the cell of the primaries is 

 very long and the discocellulars are not so oblique ; the recurrent nervure starts from 

 the median much nearer the origin of the second branch, and the discocellular of 

 the secondaries meets the median beyond the second median branch. 



Eudamus is a purely Neotropical genus, though one or two species pass into the 

 southern limits of the Nearctic area. Mr. Watson says that forty species are repre- 

 sented in the British Museum, but this number must fall considerably short of the 

 actual total. We recognize twenty-seven species as occurring within our limits ; these 

 are distributed over the whole area from our northern frontier southwards. 



A. No pencils of hairs on any portion of the wings of the male, and no special 

 sexual distinction on the wings other than a costal fold. (Eudamus.) 



a. Transverse diaphanous band of the primaries either a nearly uniform continuous line 

 or absent altogether ; the spot (when present) between the median nervure and its 

 second branch close to or absorbed in the band. 



1. E. simplicius section. Tail of secondaries long. 



1. Eudamus simplicius. (Tab. LXXV. fig. 1 s .) 



Papilio simplicius, Stoll, Suppl. Cram. Pap. Ex. p. 171, t. 39. ff. 6, 6E 1 . 



