Issoria egistina (Latreille and Godart)

Swezey, O. H., 1942, Lepidoptera, Butterflies of Guam, Insects of Guam I, Honolulu, Hawaii: Bernice P. Biship Museum, pp. 31-38 : 35

8. Issoria egistina (Latreille and Godart) .

Argynne egestina Latreille and Godart, Encycl. Meth. 9, Suppl.: 816-817, 1824. Quoy and Gaimard, Voy. autour du Monde, 256, pl. 83, fig. 4, 1824 (Guam).

Atella egistina (Latreille and Godart) Wallace, Ent. Soc. London, Trans., 4: 343, 1869.

lssoria egistina (Latreille and Godart), Fruhstorfer Seitz Gross-Schmet­terlinge der Erde 9: 473-475, 1912.

Ritidian Pt. , April 22, Bryan; Yona , April 29, Bryan; gully near Mt. Chachao, June 16, Usinger , Sept. 22, Swezey ; Piti, May 23, Sept . 4, Swezey .

This butterfly was described from Guam. I am indebted to R. L. Usinger for looking up the literature on it at the California Academy of Sciences. It was not possible to determine which authors should get credit for the species, as each group of authors (Latreille and Godart, and Quoy and Gaimard) attributes the species to the other group. Each group has given a description of the species, and the publication of each was in the same year 1824. Fruhstorfer, in the above citation, has considerable discussion of the different species of lssoria related to egistina and seems to consider them all as ~ubspecies. TODO

We found it rather rare, though quite widely spread. We reared it from a small native tree called luluhut (Gy1nnosporia thonipsonii). The caterpillar and pupa are similar to the figures of lssoria sinha bowdenia (Butler) [Hopkins, Insects of Samoa 3 (1): TODO pl. 4, figs. 6, 7, 1927]. Also collected by Fullaway.