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 



3rd joint longest 



4th and 7th almost as 



long 

 4th joint longer than 



5th 



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 

 Tvy, Laurel 

 Jasmine, Myrtle 

 Phlox and many 

 others 



Coccus citricola 

 Antennae 8-jointed 

 Formula 

 8-3-1-4-5-2-6-7 



8th joint longest 



4th joint usually 

 slightly longer than 

 5th 



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-s)-(i-4-8)-6-7 

 3-5- (2-4) -(6-8) -7 

 3rd 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, i discal and 3 

 apical setae on each 

 plate 



Dorsum with no lon- 

 gitudinal stripes 



Appearance, dingy 

 pale yellowish gray 



Submarginal tubercles 

 large and numerous 



Host plants 



Acacia, Cherimoya 

 Ficus, Lantana 

 Citrus, Palms 

 Ferns, Cherry, Lau- 

 rel and many oth- 

 ers 



