SUBFAMILY MONOPHLEBINAE 73 



for Guerinea which is preoccupied. It includes a single species, serra- 

 tulae Fab. from Europe and Algeria on Serratula. 



Icerya Sign. This is the largest genus of the subfamily so far as 

 number of species is concerned. The following are included: aegyptiaca 

 Dougl. from Egypt, Ceylon, India, Australia on Ficus, Croton, Goodenia, 

 Aristochlia; albolutea Ckll. from West Africa on Anona; brasiliensis 

 Hemp, from Brazil on Liriodendron, Laurus, Codiaeum; Candida Ckll. 

 from Philippine Islands; colinensis Ckll. from Mexico; crocea Green 

 from Ceylon on Citrus, Croton, Cocculus; genistae Hemp, from Brazil 

 on Genista, Lespedeza, Fragaria; jacobsoni Green from Java on Dom- 

 beya; koebelei Mask, from Australia on Leptospermum, Acacia; littoralis 

 Ckll. from Mexico on Croton, Mimosa; longisetosa Newst. from German 

 East Africa on Acacia; minor Green from India on mango; montser- 

 ratensis R. & H. from West Indies, Mexico on Chrysophyllum, Clusia, 

 palms, orange, banana, avocardo pear; natalensis Dougl. from Natal on 

 Acacia, orange, lemon; okadae Kuw. from Japan on orange; palmeri 

 R. & H. from Mexico on Coursetia, grape-vine; pilosa Green from Ceylon 

 on grass; purchasi Mask, from Australia, New Zeland, Fiji Islands, Ha- 

 waiian Islands, California, Louisiana, Florida, Mexico, West Indies, 

 South Africa on Pittospermum, Acacia, Cypress, orange, lemon, pine, 

 rose, grass, etc.; rileyi Ckll. from New Mexico, Mexico on Larrea, mes- 

 quite; schrottkyi Hemp, from Brazil; seychellarum Westw. from Sey- 

 chelles Islands, Mauritius, China, Formosa on citrus, Podocarpus, guava, 

 palms, rose, sugar cane; subandina Leon, from Argentina on Bulvesia; 

 tangalla Green from Ceylon on Gutierrezia; and zeteki Ckll. from Panama 

 Canal Zone. The following tables based upon tables published by Riley 

 and Howard may be found useful in separating the included American 

 species: 



SPECIES OF ICERYA 

 FIRST STAGE NYMPHS 



a. Abdomen with lateral setae cephalad of six anal chalazae minute, 



always much less than one-eighth length of anal chalazae. 

 b. Antennae with distal segment bearing many long setae, five of 



which are especially long. seychellarum Westw. 



bb. Antennae with distal segment bearing less than five especially 

 long setae. 



c. Antennae with distal segment bearing four especially long 

 setae; abdomen not emarginate between caudal pair of anal 



setae. purchasi Mask. 



cc. Antennae with the distal segment bearing two especially long 

 setae; abdomen emarginate between ithe caudal pair of anal 



setae. aegyptiaca Doug. 



aa. Abdomen with lateral setae cephalad of six anal chalazae not minute, 



about one-fifth length of anal chalazae. 

 b. Antennae with distal segment not constricted near middle and 



enlarged on proximal half, sides uniformly convex 



montserratensis R. & H. 



