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Psyche 
[Vol. 92 
collected on flowers, but some of them spend more time on leaves 
and stems than on flowers. The interspecific hybrid is somewhat 
more poorly represented with respect to its insects because fewer 
plants were seen. Lopidea nigridea hirta was described as a San 
Miguel Island endemic (Van Duzee, 1921), but the status of hirta (as 
species, subspecies or synonym of a more widespread species) is 
unclear without revision of the very large genus Lopidea. Two tortri- 
cid moth larvae were reared from the flowers of the hybrid Malaco- 
thrix (SEM lot 84E1 A, B), yielding adult females of Argyrotaenia , 
probably franciscana insulana; the various island populations once 
lumped under insulana are quite variable and need review. Lepidan- 
thrax bonus is here first recorded from San Miguel and San Nicolas 
Islands; Cockerell’s (1940: 292) San Nicolas record of L. angulus 
Osten Sacken might be a misidentification of this. The five species 
of Dialictus were described by Cockerell (1937, in the genus Halic- 
tus ) from San Miguel island. Dialictus cabrilli is still considered a 
San Miguel Island endemic (Rust, in Miller, 1985a), but this may be 
due to the poor taxonomic condition of this difficult genus. Obser- 
vations on other islands (Miller, unpubl.) and, specifically, from 
San Nicolas Island (Table 2) suggest that a similar suite of general 
pollinators is active on M. incana on other islands. Pollinator col- 
lections made on San Nicolas Island in May, 1984 were superficial 
compared to those on San Miguel Island, but consist of the same 
dominant elements. 
Other parts of plants of Malacothrix were examined as well as 
flowers, and three families of Homoptera were found on stems and 
roots. The western aster root aphid, Aphis armoraceae Cowen 
(Aphididae) on the stem of a hybrid plant on the slopes above 
Cuyler Harbor, was associated with the introduced ant Lasius niger 
L. (Hymenoptera: Formicidae). The black scale, Saissetia oleae 
(Olivier) (Coccidae) was taken on stems of M. incana near Cabrillo 
Monument, Cuyler Harbor, in May, 1977 (by SEM) and on the 
slopes above Cuyler Harbor in May, 1984. An unidentified mea- 
lybug (Pseudococcidae) was taken from the root of a plant of M. 
implicata at Cuyler Harbor, but the specimen was lost in the mail 
during attempts to obtain an identification. 
Conclusions 
All the forms of Malacothrix on San Miguel Island are appar- 
ently visited by the same suite of generalist bees and a few flies, as 
