42 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 
LIST OF BUTTERFLIES FOUND WITHIN THE AREA 
OF SOUTHERN CALIFORNIA. 
By Professor J. J. Rivers. 
The arrangement adopted was published by the National 
Museum, 1902, and compiled by Dr. Dyar, assisted by the 
foremost Lepidopterists, which will ensure its being a standard 
for a long period. 
FAMILY PAPILIONIDZA (Swallowtails.) 
Papilio Linn. 
1. P. daunus Boisd. W. H. Edw. Butt, N. Am. 1874 
This species is found sparingly from the coast to the 
foothills in arborescent localities. The food plants are 
Prunus and Salix. The eggs are deposited singly. 
.eurymedon Boisd. W. H. Edw. Butt. N. Am. 1874 
Common in the canyons from the coast to the mountains 
where in the latter localities it is to be found all the year 
(Fordyee Grinell) Larva on Frangula californica. 
3. P. rutulus Boisd. H. Edwards; Proce. Cal. Acad. Sei. 1873 
Common all over California appearing fresh durmg 
March and April near the coast and again fresh in sum- 
mer, but according to the record of Fordyce Grinnell, 
the species occur all the year round in the mountain 
canyons. Eges are laid singly on Prunus and Salix and 
upon Alnus rhombifolia. 
4. P. zolicaon Boisd. Ann. Soc. Ent. Fr. 1852 
Frequent at lower elevations; common at the Soldiers’ 
Home, Santa Moniea, (Albright). Eggs laid singly on 
Umbelliferous plants, particularly Foeniculum vulgare, 
Ger. 
.indra Reak. Proc. Ent. Soc. Phila. 
Not common but frequent in the higher mountains dur- 
ing June. (Grinnell). 
6. P. pergamus H,\Edwards. Proc. Cal. Acad. Sei. 1874 
The author places this close to Indra but having tails 
as long as asterias Habitat; Santa Barbara, Cal. 
FAMILY PIERIDA, (The Whites.) 
Pontia, Fabricius (Pieris, Schranck). 
7. P. beckeri W. H. Edw. Butt. N. Am. 1871 
Occasionally taken in overgrown fields south of Pasa- 
dena (Grinnell); at Soldiers’ Home, (Albright) Pasa- 
dena, (Herr). 
8. P. sisymbri Boisd. Ann. Soe. Ent. Fr. 1852 
Fairly common in waste places around Pasadena in early 
spring (Grinnell). 
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