1|^ Canatfiiui mntoinalojjbt. 



Vol. XXXI. LONDON, OCTOBER, 1899. No. 10. 



TABLES FOR THE DETERMINATION OF THE GENERA 



OF COCCID^. 



by t. d. a. cockerell, n. m. agr. exp. sta. 



Subfamilies. 



Males with compound eyes i. 



Males with simple eyes 3. 



1 . Anal ring with hairs ( $ ) Orthezii7ice. 



Anal ring hairless ( 9 ) 2. 



2. Mouth-parts present in adult ? ; legs present in nil 



stages MofiopJiIebince. 



Mouth-parts absent in adult ? ; legs absent in intermediate stage 

 of $ Margarodiiue. 



3. Abdomen of 9 terminating in a compound segment ; anal orifice 



hairless 4. 



Abdomen of ? not so terminating 5. 



4. Insects with a scale formed entirely of secretionary matter without 



admixture of the exuvipe ; adult $ retaining legs and 



antenna Coiichaspince. 



Insects with a scale composed partly of the exuvite ; adult $ with- 

 out legs Diaspince. 



5. Insects enclosed in a resinous cell with three orifices ; adult $ 



apodous, with the terminal segments produced into a tail like organ, 

 bearing at the extremity the anal orifice; a ])rominent spinelike 



organ above the base of the caudal extension Tachardiince. 



Not so 6. 



6. Females with the posterior extremity cleft ; anal orifice closed above 



by a pair of triangular plates Lecaniina>.. 



Not so ; triangular anal plates absent Coccince. 



In preparing the above table, I have borrowed in places from that of 

 Green, Coccidce of Ceylon, p. 12. 



