224 ENTOMOLOGICAL NEWS [May, 14 
Distributed in Pomona, Claremont, Ontario, Cucamonga, 
Colton, Highlands, Redlands and Riverside in Southern Cali- 
fornia; in Tulare and Fresno Counties in the lower San Joa- 
quin Valley and slight infestations in Sacramento, Yuba City 
and Marysville in the Sacramento Valley. It is very probable 
that the insect has existed in California for some time and has 
passed unnoticed, or what is more likely, has been confused 
with and identified as Coccus hesperidum Linn., which it 
closely resembles. 
Comparison of Coccus citricola n. sp. and two related species. 
Coccus hesperidum. 
Antennae 7-jointed 
Formula 
(3-7)-4-2-1-6-5 
ard joint longest 
4th and 7th almost as 
long 
4th joint longer than 
sth 
Hairs of anal ring 8, 
2 fringe, 2 subapical 
and 4 apical setae 
on each plate 
Dorsum with no lon- 
gitudinal stripes 
Appearance, yellow 
minutely § specked 
with brown spots 
4 or 5 submarginal 
tubercles on a side 
3 or 4 generations a 
year 
Infests young trees, 
or a single branch 
of a single large 
tree in an orchard 
Host plants 
Oleander. Camellia 
Citrus, Holly 
Ivy, Laurel 
Jasmine, Myrtle 
Phlox and many 
others 
Coccus citricola 
Antennae 8-jointed 
Formula 
8-3-1-4-5-2-6-7 
&th joint longest 
4th joint usually 
slightly longer than 
Sth 
Hairs of anal ring 6, 
2 fringe, 3 subapical 
and 4 apical setae 
on each plate 
Dorsum with distinct 
irregular yellow 
stripes 
Appearance, dull gray 
interspersed with 
irregular yellow 
spots 
Submarginal tubercles 
very few or want- 
ing 
One generation a 
year 
Infests large trees 
uniformly and most 
of the trees in an 
orchard 
Host plants 
Citrus trees 
Coccus elongatus 
Antennae 8-jointed 
Formulae 
3-(2-5)-(1-4-8) -6-7 
3-5- (2-4) - (6-8) -7 
ard joint longest 
8th joint one of 
shortest 
5th joint quite con- 
stantly longer than 
4th 
Hairs of anal ring 8, 
4 fringe, 4 subapi- 
cal, 1 discal and 3 
apical setae on each 
plate 
Dorsum with no lon- 
gitudinal stripes 
Appearance, din gy 
pale yellowish gray 
Submarginal tubercles 
large and numerous 
Host plants 
Acacia, Cherimoya 
Ficus, Lantana 
Citrus, Palms 
Ferns, Cherry, Lau- 
rel and many oth- 
ers 
