LEPIDOPTERA HETEROCERA. 11 



from the Lithosii. Herrick-Schaeffer in one of his diagrams illus- 

 trates the convergence of the various tribes of Papilionidae to 

 Hesperia, whence the divergence is by means of Urania and Coronis 

 to Geometrides, by Castnia to Noctuides, by Agarista to Bombycides, 

 and by iEgocera and Cocytia to Sphingides. 



Genus 1. EUSCHEMON. 



Maxillae sat longae. Palpi labiales mediocres; articulus lus 

 brevissimus, compressus, arcuatus, squamosus pilosus ; 2us subcy- 

 lindricus, squamosus, lo quadruplo longior ; 3us longi-ovatus, bre- 

 vis, subsquamosus, 2o gracilior. Antennae longae, clava fusiformi 

 valde hamata terminatae. Oculi magni. Frons lata. Alae anticae 

 trigonaB ; posticae latae, subovatae. Pedes sat longi; tibiae anticae 

 intus spina arcuata armatae ; tarsi antici tibiis duplo longiores, 

 articulo lo longissimo, tibiae posteriores spinisplurimis minutis late- 

 ralibus duabusque validis apicalibus armatae, tarsis triente breviores ; 

 ungues validi, simplices. 



Euschemon, Doubleday, Stokes Discoveries in Australia, i. Appen- 

 dix, 513. 

 Hesperia, p., MacLeay ; Westw. 



" Maxillae moderately long. Labial palpi of moderate length, 

 basal joint very short, compressed, curved, clothed with scales and 

 long hairs, second joint about four times as long as the first, subey- 

 lindric, clothed with long scales, third joint clothed with small 

 scales, short, elongate-oval, more slender than the second, the scales 

 of which almost conceal it. Antennae elongate, with a fusiform 

 club much hooked at the extremity. Eyes large. Forehead broad. 

 Fore wings triangular, the outer and inner margins nearly equal, 

 about two-thirds the length of the anterior. Costal vein about two- 

 thirds the entire length of the wing ; subcostal veinlet slightly de- 

 flected tovvards the end of the areolet, throwing off its first veinlet at 

 about one-third of its length, the second about the middle of its 

 course, the space between the origins of the second and third vein- 

 lets not so long as that between the first and second, the fourth 

 arising just before the end of the areolet ; upper disco-cellular 

 veinlet very short, the second discal equidistant from the first discal 

 and the third median veinlet, the disco-cellular veinlets almost atro- 

 phied ; median veinlet throwing off its first veinlet not far from the 

 base, the third veinlet a little bent where the disco-cellular joins it, 

 radial vein running nearly parallel with the inner margin through- 

 out its whole length, reaching the outer margin a little above the 

 anal angle. Hind wings broad, semi-ovate, costal vein long, sub- 



