10 NOVTTATES ZOOLOOICAE XXVI. 1919. 



that the two are species as opposed to subspecies. If my readers will refer to 

 Dr. Jordan's and my monograph, "Revision of the Lepidopterous Family 

 Sphingidae," Novitates Zoologicae, volume ix. Supplement, pages 132-134, 

 they will find imder the description of Hyloiais ( = Sphinx) perelegan.s Edwards 

 that the species has two forms, i.e. is dimorpliic, and that the one form 

 asellus R. and J. has the pararychium of the tarsus reduced and without lobe, 

 while the other form perelegans Edw. has this organ with a prolonged lohe. 

 This case shows that occasionally seasonal or climatic influences may affect 

 individual organs in lepidoptera within the same species or subspecies in the 

 same locality, and yet are not of specific or subspecific importance or significance. 

 On the other hand, structural variation, especially in chitinous organs, is in most 

 instances of deeper significance than colour and pattern differences and must 

 be more carefully studied before coming to a decision as to the precise meaning 

 of this variation in a given instance. 



Castnia (Xanthocastnia) evalthe (Fabr.) 



Papilio evalthe Fabricius St/st. Entoniol. p. 480. no. 166 (1775) (in Indiis). 



I (?, 1 ? Onoribo, Dutch Guiana, February 1893 (C. W. Ellacombe) ; 1 ? 

 Paramaribo, February 1892 (C. W. Ellacombe) ; 1 $ Rio Demerara ; 1 ? British 

 Guiana ; 1 $ ? ; 2 ??, 1 cj ? (ex coll. Felder) evidently Surinam. 



I have no specimens from Cayenne, so am imable to say if evaltheformis 

 Houlb. is constantly distinct or not. 



Castnia (Xanthocastnia) evalthe evalthoides Strand 



Castnia evalthe evalthoides Strand, in Seitz, Grossschmett. Erde, vol. vi. p. 8. pi. 3a (1913) (Bolivia). 



1 3 Cajon, Cuzco, November 1900 (Garlepp.) ; 1 3 Province Rio; 1 cJ, 1 ? 

 Buenavista, East BoUvia, 750 m. = 2,437 ft., August 1906— April 1907 (Jose 

 Steinbach) ; 1 (J, 1 $ Sta Cruz de la Sierra, E. Bolivia 1905—1906 (Jose Stein- 

 bach) ; 1 <J Santiago del Estero, E. Bolivia, 1905-1906 (Jose Steinbach). 



Castnia (Xanthocastnia) evalthe quadrata subsp. nov. 



Nearest to evalthe evalthoides by reason of the complete submarginal row 

 of 7 red spots on the hindwing. Differs from e. evalthoides in its much larger 

 size, narrow and strongly bent upper portion of yellow band on hindwing, and 

 in the great size and quadrate shape of the red spots. 



Length of forewing : <? 52 mm. ; ? 70 mm. Expanse : cj 112 mm. ; ? 148 

 mm. Largest cJ evalthoides at Tring length of forewing : 44 mm. Expanse : 

 7 mm. 



1 (J, 1 ? Pozuzo, Department Huanaco, Peru (Hoffmarms) (type ?) ; 1 cJ Mar- 

 capata, East Peru, 4,500 ft. ; 1 <J Zamora, Ecuador, 3—5,000 ft. (0. T. Baron). 



Castnia (Xanthocastnia) evalthe evalthonida Houlb. 



Castnia evalthonida Houlbert, Elud. Lipid. Comp. faac. xiii. p. 66. pi. iv. f. 5 (1917) (Cananchc). 



3 ?§ Bogota ; 1 <J Bogota (Child) ; 3 33 Bogota (Lindig, ex coll. Felder) ; 

 2 (J (J, 1 $ Sta Fe de Bogota ; 2 cji^ Pizarro Cundinamarca, September 1903 

 (M. de Mathan) ; 1 ? Cundinamarca, Columbia, June — September 1903 (M. de 

 Mathan) ; 1 tJ ?. 



