EARWIGS OF THE 
CALIFORNIA CHANNEL ISLANDS, WITH NOTES 
ON OTHER SPECIES IN CALIFORNIA (DERMAPTERA)* 
By Scott E. Miller 
Museum of Comparative Zoology 
Harvard University 
Cambridge, Mass. 02138 
Although the earwigs of the California Channel Islands were 
included in Langston and Powell (1975) and Langston and Miller 
(1977), newly accumulated records extend their distributions signifi- 
cantly (Table 1). Some of these new records are due to increased 
collecting activity by interested entomologists, but most probably 
represent range expansion by the earwigs, aided by increased human 
activity on the islands. The two species involved, Euborellia annu- 
lipes (Lucas) (Carcinophoridae) and Forficula auricularia Linnaeus 
(Forficulidae), are both considered to be introduced to California 
(Langston and Powell 1977). The two are readily distinguished by 
the shape of the forceps (Langston and Powell 1977: figs. 3, 11), as 
well as the adults being wingless (E. annulipes ) or winged (F. auricu- 
laria). This note is based on the collections of the California 
Academy of Sciences (CAS), Natural History Museum of Los 
Angeles County (LACM), Peabody Museum of Yale University, 
San Diego Natural History Museum (SDNHM), Santa Barbara 
Museum of Natural History (SBMNH), Smithsonian Institution 
(USNM), and University of California at Berkeley (UCB), as well as 
my own fieldwork on all islands from 1976 to 1984. 
Euborellia annulipes (Lucas) 
This cosmopolitan species has been established in coastal south- 
ern California since at least the 1880s (Langston and Powell 1977). 
Channel Islands records are as follows: Santa Rosa: A single female 
was taken in July 1939 (LACM). A colony was found at Johnsons 
Lee in May 1977 (SBMNH). Santa Catalina: A series was collected 
at Avalon in October 1908 (USNM), but recently only single indi- 
* Manuscript received by the editor June 26, 1984. 
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