SUBFAMILY COCCINAE 103 



lobes; antennae typically with seven segments, sometimes with six, 

 some of intermediate segments longer than proximal or distal seg- 

 ments; rostrum consisting of two inconspicuous segments. 



Coccus Linnaeus. 



aa. Body of adult female bearing pointed setae, but never bearing short 

 truncate setae; antennae always with six segments, always with 

 distal segment longer than others; adult female with small incon- 

 spicuous microscopic anal lobes; rostrum not described 



Epicoccus Ckll. 



Coccus Linnaeus. The following table based upon the descriptions 

 and figures of Green will serve for the separation of the species: 



SPECIES OF COCCUS 



a. Body with truncate setae few in number, long and slender in form, 

 width of their distal ends about one-fourth their length; cerores 

 large with thick rims, arranged in clusters, each cluster consisting 

 of two to twenty cerores, average twelve or thirteen; eyes cylin- 

 drical, longer than broad; body pruinose, without conspicuous to- 

 mentum. Mexico, Canary Islands, Algeria, Spain, West Indies, 

 Maderia, Peru, Florida, California, Guatamala, Italy, Cape Colony, 

 India on Opuntia. cacti Linn. 



aa. Body with truncate setae numerous and comparatively large, dis- 

 tinctly truncate, the width of the distal end about one-half their 

 length; cerores small and without thick rims; eyes round or broad- 

 er than long; body conspicuously covered with white tomentum. 



b. Antennae with distal segment subglobular, as broad as long; 

 cerores small and inconspicuous, usually in clusters of three or 

 four, rarely five to six; truncate setae stout, with parallel sides 

 and distal end distinctly narrower than diverging sides of proxi- 

 mal half. India, Ceylon, California, New York, Argentina on 

 Opuntia. indicus Green. 



bb. Antennae with distal segment longer than broad; cerores ar- 

 ranged in comparatively large clusters; truncated setae not as 

 above. 



c. Antennae and legs very small, trochanter and femur .12 to 

 .16 mm. in length; antennal segments much contracted, total 

 length .10 to .11 mm.; cerores small and inconspicuous, in 

 clusters of two to sixteen, average about sixteen; truncate 

 setae numerous and conspicuous, variable in form, ranging 

 from quite slender to short and broad and cylindrical. Mis- 

 souri, Arizona, New Mexico, California, Mexico, England on 



Opuntia. tomentosus Lamar. 



cc. Antennae and legs larger, trochanter and femur .18 to .23 mm. 

 in length; antennal segments compartively broad and extend- 

 ed, total length .15 to .18 mm. 



d. Truncate setae elongate, cylindrical, slightly expanded at 

 proximal end, diameter of proximal end one-half or slightly 

 more than total length of the seta. 



