AETETJEOTIA. 357 



appear to have the conspicuous patch of modified scales on the secondaries of the 

 male so obvious in A. tractipennis and an essential feature of the genus. 



The antenna? have a stout club ; the hooked terminal portion is short, and not more 

 than half the length of the rest of the club. Palpi porrect, the third joint obtusely 

 conical. Primaries with the outer and inner margins subequal ; no costal fold ; cell less 

 than two-thirds the length of the wing ; disco cellulars nearly transverse, the lower longer 

 than the middle ; third median segment short, about one fourth the second segment. 

 Secondaries produced at the anal angle ; cell wide ; discocellulars feeble, subequal ; 

 radial just visible ; third median segment very short, second median and second subcostal 

 segments subequal ; a large patch of peculiar scales towards the apical angle ; no tuft 

 of hairs ; subcostal and its first branch not swollen. Hind tibiae with two pairs of spurs ; 

 both hind and intermediate tibiae spiny. Male genitalia with asymmetrical harpes. 



Arteurotia, as restricted to A. tractipennis, is confined to Southern Mexico and 

 Central America. 



1. Arteurotia tractipennis. (Tab. LXXXll. fig. id.) 



Arteurotia tractipennis, Butl. & Druce, Cist. Ent. i. p. 112 (1872) 1 ; P. Z. S. 1874, p. 367 2 ; Butl. 



Lep. Ex. p. 187, t. lxiv. f. 5 3 ; Plotz, Berl. ent. Zeitschr. 1882, p. 256 4 . 

 Helias (?) ribbei, Staud. Verh. zool.-bot. Ges. Wien, xxv. p. 117 (1875) 3 . 



Alis pallide fuscis griseo atomatis ; ariticis margine externo et fasciis duabus evanescentibus, transversis, fuseis, 

 plaga subtriangulari in costa ad apicem quoque fusca, macula intra earn et dnabus ultra earn albis ; posticis 

 plaga magna costali angulum apicalem vix attingente nigricante albido circumcincta, margine externo 

 fusco: subtus rufescenti-fuscis, marginibus externis (ciliis exceptis) et area basali griseo-albicantibus ; 

 posticis maculis albidis discalibus indistinctis notatis ; palpis supra fuscis, subtus albis, apicibus nigris. 



5 mari similis, sed alis magis truncatis ; anticis plaga magna fusca in dimidio proximo ; posticis plaga costali 

 nulla, sed fusco indistincte bifasciato ; subtus omnino magis rufescentibus. 



Edb. Mexico, Atoyac (E. H. Smith, Schumann), Valladolid in Yucatan (Oaumer) ; 

 Guatemala, Choctum (F. D. G. & 0. S.), Eio Naranjo and Zapote (Champion); Costa 

 Eica (Van Patten 123 ); Panama, Bugaba (Champion), Chiriqui (Bible 5 , Arce), 

 Veraguas (Arce). 



This peculiar species, which has no near ally that we know of, is tolerably abundant 

 in the hotter parts of Eastern Mexico, Guatemala, and thence southwards to the State 

 of Panama. Mr. Herbert Smith captured a good series, including both sexes, at 

 Atoyac in Vera Cruz, in the month of April, and Mr. Champion also found it in 

 several parts of Guatemala, and in abundance at Bugaba, in the State of Panama. 



The specimen described by Messrs. Butler and Druce formed part of Van Patten's 

 Costa Eica collection; but some years previously we captured a worn example at 

 Choctum, in Eastern Guatemala. Dr. Staudinger bestowed the name of Helias ribbei 

 on this species, from specimens collected by Herr Eibbe at Chiriqui 5 . 



The large patch of modified scales on the secondaries of the male is a conspicuous 

 feature in this species. 



