ME.MOIKS OF THE NATIONAL ACADEMY OF SCIENCES. 65 



venation and genital armature of the motlis, I do not find it jjossiblc to divide up the geiuis, 

 although it would be most desirable if so apt a name as Walsh's Sphingieuinpa could be retained. 

 The most aberrant species as regards its venation is A. alholuimta. and when we know the larva, 

 and have studied the male genitalia, this species may have to be referred to a separate ocnus. 



I scarcely think that from the facts here given Doctor Dyar is warranted in referring all 

 the species of Adelocephala which have simple antenna? in the female to Svssphinx. That name 

 should obvioush" be retained for .S'. iiioluui alone unless S. jh-tersil should prove to be a member 

 of that genus. 



The larva of Si/ssj)h!n,v inoVnia ditiers from any of those of Adelocephala in the general 

 reduction of the spines. In venation it approaches nearest to ^1. hleolor in vein III, and in the 

 size and shape of the discal cell of the fore and hind wings; the antennse do not seem to aftord 

 in this subfamily reliable characters. As regards venation, ^1. aUxAineata is the most aberrant, 

 while ^'1. htcoloi\ A. heiUghrodfii., and ^i. xuhamjulata form a gi'oup by themselves; and ^1. hiseda 

 with A. montezmtia^ ai"e closely allied.- 



If we consider the $ genital armature, Adelocephala may be divided into three groups: 

 1. with the claspers rounded, A. hixecta and he>Ii(jhro(ltii; 2, claspers acute, with the suranal 

 plate and penis very ditlerent from 1, S. Vtcolor; 3, A. xitlHinguhda, in which the armature diiiers 

 from all the other species examined. 



In his diagnosis of Othorene. Boisduval states that the female antenna? are pectinated. He 

 places under this genus the following species: A. cuduuix, jason, falkm, nivxicuna^ and trardii. 

 Doctor Dyar considers the pectination of the female antenna? as a generic character, and places 

 ^4. licofor and aid/nu-^ in Adelocephala, referring^!, hixeefa, A. Jieiliyhri>dt!)^ and live Brazilian 

 •species to Syssphinx. However interesting this dilierence in the female antennte may be, the 

 two groups regarded as genera by Dyar appear to contain (juite incongruous material, and do not 

 appear to us to be natural genera, as genera go. 



Fntil the larval forms of all the species of Adelocephala are known it would scarcely be 

 possilile to present a natural classitication, or to make an attempt at a phylogeny of the numerous 

 species of this genus. 



It seems evident that A. otithoKtUx, whose larva has well-developed jirothoracic dorsal spines, 

 is one of the most primitive species. Then would come our Brazilian larva (PI. Ill, fig. 1), and 

 that of Adelocephala hr<-ris, figured by Peters (PI. Ill, tig. .')); also A. leucant/ia, of which 

 Boisduval says: ''La collerette est garnie d'une rangee de petites pointes assez saillantes;" also, 

 that the dorsal abdominal spines are of equal length, while the dorsal and caudal horns "sont ur. 

 peu dentelees." 



Then would follow the larvse with long, even, dorsal spines, except those on the prothoracic 

 segment, which are reduced to button-like tubercles, as A. .sidja/u/n/afa (Peters, PI. III., tig. -i). 

 These would be succeeded by the more specialized species, in which the abdominal dorsal spines 

 are short and long on alternate segments, including A. wardli and our United States species. 



AVe arc therefore under the circumstances compelled to begin with the most recent and best- 

 known •species, A. bicohir, and the others occurring in the United States, and then consider 

 those of Central, and lastlv those of South America, though the genus originated in Neogsea. 



Ji.I3KI^OCET?H^VL^ BICOLOR (H.-oris). 



Plate XIX, fig. 3; 



Di-ijomrnpa liiculor Harris, Rep. Ins. Ma.ss.. p. 29:1 1841; Treatise ins. inj. veg., p. 408. 1862. 



Morris, Synopsis Lep. X. .\mer., p. 2:^2. 1862. 

 Sphingicampa diMigma Walsh, Proc. Bost. Soc. Xat. Hist., IX. p. 290. Feb., 1864. 

 Sphingicwnpa bicoUjr (?) Walsh, Proc. Bost. Soo. Xat. Hist., IX, p. 29:1 Feb., 1864. 

 Anuola hicolor Gkotb, Proc. Ent. 8oc. Phil., Ill, p. 93. June, 1864. 

 Drijocampa hicohir Packard, Proc. Ent. Soc. Phil., Ill, p. 384. Xov., 1864. 

 Adelocephala hicolor and var. Immactdata Je\vett, Papilio, II, p. 144. 1882. 

 Adelocephala hicolor var. suprema Xecmoeoen, Ent. Amer., I, p. 94. 1885. 

 Sphingicampa hicolor Kirby, Syn. Cat. Lep. Het., I, p. 740. 1892. 



Sphingicampa ticotor Xeimoegex and Dyah, Journ. X. Y. Ent. Soc, II, p. 148. Dec., 1894. 

 Adelocephala hicolor Dyar, Proc. Ent. Soc. Wash., IV, p. 428. May 13, 1901. 



