302 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



This species, according to Wallengren, is related to L. parr- 

 hasins of Java. Its nearest ally and perhaps the one from 

 which it was derived, is probably Lye. marina of America, 

 from which it can be separated by its somewhat smaller size 

 and darker shade, and by the possession on the under side of 

 the secondaries of three (with traces of one or two more) 

 distinct velvety black spots ringed by metallic blue and then 

 by orange, whereas marina has but two such spots. The sec- 

 ond spot from the anal angle is the largest. The undulating 

 white lines of the wings beneath are finer than in marina. 



C. parrhasioides is common in the Galapagos, where it was 

 found on Charles, Chatham, Albemarle, Narborough, James, 

 Hood, and Duncan Islands. It seems to be more restricted to 

 the arid district than are the other butterflies, and occurs 

 commonly where its food plant, Cardiospermum corindum 

 and perhaps C. galapageium (Sapindacece) is found. 



Near the shore at Cape Rose (Albemarle Island), in 

 March, 1906, the little butterfly was plentiful in the vast field 

 of jagged black lava which supported a somewhat scant vege- 

 tation — C rot on, Biirsera, Opuntia, Cereus, etc., and its vine- 

 like food plant. The butterfly was here observed to oviposit 

 on the young leaves of this plant. At the lower levels, about 

 James Bay (James Island), parrhasioides was abundant 

 where Cardiospermum flourished, which was especially on lava. 

 The butterflies were at this season (August, 1906), in a gen- 

 erally faded condition, and the tgg shells of the species were 

 plentiful on Cardiospermum, then in leaf. 



As the imagines were fresh and common at a much earlier 

 date than August, we may infer therefrom that parrhasioides 

 is double-brooded, the February-March specimens emerging 

 from pupae formed in about September of the preceding year; 

 or perhaps that the insect passes the dry season as an egg or 

 small caterpillar. 



A female parrhasioides from Iguana Cove, Albemarle, is 

 aberrant in having the undulating white lines beneath diffusing 

 and disappearing. 



The insect was also taken on the voyage of the "Eugenie" ; 

 by A. Agassiz in 1891 ; and by Snodgrass and Heller of the 

 Hopkins-Stanford Expedition. Its occurrence on Puna Island 



