336 EHOPALOCEEA. 



COCCEIUS, gen. nov. 



Eudamus pylades, which we make the type of this genus, has usually been placed 

 with T. bathyllus in the genus Thorybes, but the presence of a costal fold to the 

 primaries of the male indicates that its true relationship is rather with Achalarus. 

 From the latter genus it differs in the shape of the secondaries, which are much more 

 rounded at the anal angle. 



C. pylades has a wide range in North America, and extends over the highlands of 

 Mexico as far south as the State of Oaxaca. A second species, C. drusius, occurs 

 along our north-western frontier. 



Achalarus, of which the type is the North-Ameriean A. lyeidas, does not occur 

 within our region. Its range, according to Mr. Watson, extends to the Indian region, 

 where several species are found. 



1. Cocceius pylades. (Tab. LXXX. fig. 23 e .) 



Eudamus pylades, Scudd. Proc. Bost. Soc. N. H. xiii. p. 207 (1870) *; Edw. Trans. Am. Ent. Soc. 



xi. p. 320 \ 

 Thorybes pylades, Scudd. Rep. Peab. Ac. Sc. iv. p. 50 3 ; Butt. E. U. S. ii.p. 1436 4 ; Wats. P. Z. S. 



1893, p. 33 5 . 



Alis saturate brunneis, ciliis omnibus fere concoloribus vix pallidioribus ; anticis maculis parvis septem semi- 

 hyalinis, una cellulari, una ultra earn, una rami mediani primi utrinque et tribus subapicalibus : subtus 

 posticis fasciis duabus transversis valde irregularibus nigro limbatis, una discali, altera per cellulam : palpis 

 fuscis, plica costali obvia. 



2 mari similis, sed maculis anticarum majoribus. 



Hab. Noeth Ameeica generally, from Canada to Florida, California, Colorado, and 

 Arizona 2 . — Mexico, Northern Sonora (Morrison), Milpas in Durango (Forrer), Oaxaca 

 (Fenochio). 



We have little to add to the account given of this species by Mr. Scudder 4 in his 

 ' Butterflies of New England and the Eastern United States.' We trace the extension 

 of its range from Sonora and Durango to Oaxaca, but not from any intermediate point. 

 Our specimens from the latter locality are worn and the fringes abraded ; but we 

 believe them to be referable to this species, and not to the white-fringed C. drusius. 

 These species are exceedingly like the members of Thorybes, but may be distinguished 

 by the costal fold of the primaries of the male. 



The male genitalia have a tegumen like that of Thorybes bathyllus ; it is longer than 

 in Phoedinus mexieanus, but cleft at the end ; the harpes have rounded extremities, and 

 there is a fissure on the dorsal edge. (See Tab. LXXX. fig. 23.) 



2. Cocceius drusius. 



Eudamus drusius, Edw. Can. Ent. xv. p. 211 (1883) l ; Trans. Am. Ent. Soc. xi. p. 320 2 . 



C. pyladi affinis, sed ciliis posticarum albis facile distinguendus ; anticis sicut in G. pyladi, plica costali 

 instructis. 



Hab. Noeth Ameeica, Arizona x 2 .— Mexico, Northern Sonora (Morrison). 



