OOG MR. H. W. HATKS ON THE AMAZON-VALLEY HELICONIDE LEPIDOITERA. 



tioii whose adaptation is complete. As to the fore wings, the vaciihiting nature of the colours 

 is seen in figs. 4, 6, and 8 of Plate LV. in the clearest manner. The hind wings appear very 

 peculiar, on account of the milky colour ; hut this is sliown to arise by variation in Ithomue, which 

 exhibit all the grades of variation from dusky to white nervurcs atid ground of the hind win"-. 



Fig. 5. Leptulis Nehemia (of authors). — New Granada and S. Brazil. 



Figured to show the normal form of the family {Pieridw, called in England " Garden White" 

 Butterflies) to which Lcptulis l)elongs. The contrast in form and colours ])oints to the conclu- 

 sion that all the other forms of Lcptalis are perverted from the usual facies of the family by long- 

 continued process of adaptation to the lleliconidic, in whose com[)any (each species with its 

 Heliconian model) they are solely found. 



Fig. f). LcptalLs Theonoc, var. Art/ucliloc. — 8t. Paulo. 



Fig. (i«. Uhoiuia F//v/iw/« (llewits.). — St. Paulo. 



The links of modification may be traced also with respect to this apparently distinct Lcptalin. 

 The shape of the spot of the fore wing is seen to be very variable in figs. 1, 2, .5 of this Plate, 

 and in 'J and 4 of Plate LV. 



Fig. 7- Lcjital'us Aiiipluimc, var. E(jncnii. — Ega. 



Fig. 7"- Mcc/iuniJis I'olymnlii, var. Ei/ui-nsis. — ICga. 



Fig. H. Lcp/alls Orise (Boisduval). — Cupari, CtC/' VV. long. ; also (Cayenne. 



Fig. S«. Methona I'sidii (LinnaMis). — Cuj)ari ; also Cayenne. 



EKUATUM. 



.\X |i. U\'.>, iiftcr the characters of Family 2. I'ai'ii.iomi) i., insert 

 Siihfam. 1. Paimlionin.i;. 

 Siild'ain. '1. I'lKKiN.i:. 



