1886.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 419 



There are here three groups or sectious, correspondiug with Attacus, 

 Callosamia, and Platysamia, and those with a penchant for numerous 

 genera can use those names. They indicate actual divisions, but the 

 lines are so slight and so sui^erficial that 1 do not care to use them 

 myself. 



In synoptic form the scheme above outlined would be ns i'ollows : 



Both ■\^■in^s u ith trit^-unate vitreous sputs. 



Size large: spots on both ■wings acutely- tiiaugular; tlie base concave or straight. 



SPLENDIDUS. 



Size large : siiots on both wings rather rounded at angles ; base on the primaries 



straight, on seooudaries spot more elliptic, apex indenting the t. p. line.ORiZABA. 



Size smaller, spots smaller, not or rarelj- touching and never indenting the t. p. 



line, shape much as in orizaba cinctus. 



Wings without vitreous spots, but with a lunate or angulated pale or white spot. 

 Male with subfalcate wings, dissimilar in color to $ ; spots angular. 

 Abdomen of 9 not banded, a pale lateral stripe including black spots. 



Both sexes very dark, with a very distinct broad white t. p. line on both wings. 



Angular marks iu ^ distinct calleto. 



Male blackish, with the transverse lines very faint, the white marks obsolete; 



$ reddish fulvous, the abdomen obsoletely banded promethea, 



Male more like 9 than usual, fulvo-fuliginons, the t. p. line and strongly angu- 

 lated mark distinct, primaries less falcate than in lyrometliea . . .axgulifera. 

 Sexes similar in color and maculation, aud but little difference in wiug shape ; 

 abdomen of both sexes banded pale marks lunate. Size small ; spots unusually 

 small; male antenn.-e moderate; white band not or narrowly edged with pink. 



COLUMBIA. 



Larger; spots larger and narrower, more lunate, color deep carmine brown; $ 

 antennpe very large gloveri. 



Similar to the preceding but much lighter pinkish or rust red in color, t. a. line 

 angulated instead of rounded ceanothi. 



Largest, the t. p. line red, or with a broad red outer margin dark smoky brown 

 in color cecropia. 



Attacus splendidus De B., Ins. Afr. et Am., p. 133, pi. 22, f. 1, 2 (Bomhyx); Clem., 

 Pr. Ac. N. Sc. Phil., Ib60, p. 160 (Attacus); Morris, Syn. Lep., 228, 1862 (Atta- 

 cus). 



Prevailing color dull reddish brown varying in intensity and shade 

 from a rich deep purple brown to a sordid luteous brown. Thorax with 

 a white band on collar and another at base. Abdomen with a stigmatal 

 white band, margined with black and inclosing red brown spots. Pri- 

 maries with a white basal transverse baud, strongly angulated out- 

 wardly on the median vein ; outwardly bordered with black, inwardly 

 by a brighter orange red shade. At outer third is a similar transverse 

 band, interrupted by the large triangular vitreous spot, above which it 

 is straight and below which it is wavy. The vitreous patch is trigonate, 

 the base extending across the cell near its end and the apex strongly 

 indenting the transverse posterior line. Beyond this band is a pinkish 

 or lilac shade strongly dusted with black scales, irregular in outline 

 and variable in extent and intensity of color. Beyond this the wiug is 

 of a deeper luteous or buff color inwardly powdered with black scales, 



