MASICES.— ANTIGONUS. 409 



This species is closely allied to M. anticus, and perhaps hardly separable. The 

 difference in the colour of the apex of the primaries beneath is, however, well defined, 

 and seems associated with definite districts, and thus a separate name is justifed. 



Mr. Smith obtained us a good series of specimens from the Mexican State of Guerrero 

 in the west, and we have several others from various parts of Central America. The 

 female is a large insect, one of the largest of the American Hesperiidse. 



ANTIGONUS. 



Antigonus, Hiibner, Verz. bek. Schm. p. 108 (1816) ; Wats. P. Z. S. 1893, p. 57. 

 Cheetoneura, Feld. Wien. ent. Monatschr. vi. p. 185 (1862). 



Antigonus is restricted by Mr. Watson to two species — A. nearchus, the type, and 

 A. erosus, — the only ones known to him. As these two insects differ in several points, 

 and as the latter is representative of a group of species having characters in common, 

 we now restrict the name Antigonus to A. nearchus alone, and assign A. erosus to 

 Mr. Edwards's genus Systasea. 



The antennae of A. nearchus are peculiar in being abruptly bent backwards near the 

 tip, the recurved point even crossing the club ; the primaries are pointed, the outer 

 margin slightly convex nearly to the anal angle, where there is a small rounded lobe ; 

 the costa has a small but obvious fold ; the third median segment is short ; the lower 

 and middle discocellulars subequal, in a line, and slightly oblique ; the secondaries 

 have a prominent tooth near the apical angle ; the third median segment is very short, 

 the second subcostal segment not more than twice as long ; the discocellulars and radial 

 are very obscure ; the terminal joint of the palpi is very short ; the hind tibiae have two 

 pairs of spurs and a tuft at the proximal end. 



The single species of the genus ranges nearly throughout the Neotropical region. 



1. Antigonus nearchus. (Tab. LXXXVU. fig. 15.) 



Hesperia nearchus, Latr. in Humb. & Bonpl. Obs. Zool. ii. p. 135, t. 43. ff. 3, 4 1 ; Enc. Meth. ix. 



p. 791 \ 

 Antigonus nearchus, Butl. & Druce, P. Z. S. 1874, p. 370 3 : Wats. P. Z. S. 1893, p. 57 4 . 

 Antigonus ustus, Geyer in Hiibn. Zutr. ex. Schm. iv. p. 28, ff. 719, 720 ? 5 . 

 Achlyodes pausus, Westw. in Doubl. & Hew. Gen. Diurn. Lep. t. 80. f. 6 6 . 

 Chcetoneura hippalus, Feld. Wien. ent. Monatschr. vi. p. 186 7 . 

 Chcetoneura sataspes, Feld. ibid. p. 186 8 . 



Alis saturate fuscis ; anticis linea submarginali, macula ad medium raarginis externi, angulo anali, macula a 

 medio cellulae ad margine interno (introrsum squamis albidis trimaculata) aliisque maculis ad costam 

 nigricanti-fuscis ; posticis margine externo lineisque discalibus undulatis angustis nigricanti-fuscis : 

 subtus ferrugineo-fuscis, anticis lineis angustis nigricantibus transversis ; posticis bitriente interna 

 ochracescente, lineis undulatis fuscis notata ; palpis subtus albis, segmento terminali nigricanti-iusco ; 

 tborace et abdomine infra albis ; pedibus ocbraceis, penicillo tibiali posticarum ochraceo. 



2 alis omnino pallidioribus et grisescentioribus, maculis et lineis omnibus magis obviis : subtus quoque multo 

 pallidioribus. 



biol. centk.-amek., Rhopal., Vol. II., October 1895. 3 g 



