SUBFAMILY LECANIINAE 175 



sisting of six segments; cuticle of dorsal aspect with 

 minute distant alveola; anal ring with ten anal ring 



setae. Toumeyella Ckll. 



dd. Body of adult female spherical, never convex or subdepressed. 

 e. Adult female with opercula not prominent and not dorsal 

 in position. 



f. Cuticle of the dorsal aspect with minute distant 

 alveolae; legs and antennae rudimentary or wanting; 



opercula obscure. Akermes Ckll. 



ft. Cuticle of dorsal aspect with large polygonal sub- 

 adjacent alveolae; legs and antennae rudimentary 



Megasaissetia Ckll. 



ee. Adult female with opercula prominent, swollen, dorsal in 

 position; antennae and legs wanting; body with lateral 



portions infolded forming marsupium on each side 



Physokermes Targ. 



cc. Adult female with body greatly elongated with lateral mar- 

 gins subparallel; anal cleft and opercula wanting; legs want- 

 ing; antennae represented by unsegmented tubercle on each 

 side; mesothoracic spiracles sometimes located considerable 

 distance cephalad of attachment of rostrum Aclerda Sign. 



Exaeretopus Newst. The type species, formiceticola Newst., was 

 collected in the nests of ants in England, the other species, caricis Ehrh., 

 occurs on Carex and Trisetum in California. 



Lnzulaspis Ckll. A single species, luzulae Dufour, is found in 

 Europe on Luzula. A second species, spinulosa Leon., has been recorded 

 from Argentina on Atriplex. 



Spermococcus Giard. This poorly defined genus includes a single 

 species, fallax Giard, from France on the roots of grass. 



Lichtensia Sign. There are twelve species included in this genus. 

 The following are found in America: argentata Hemp, from Brazil; 

 colimensis Ckll. from Mexico on ?Celtis ; crescentiae Ckll. from Mexico on 

 "Guanabano"; lutea Ckll. from Mexico on Croton, wild fig; lycii from 

 New Mexico on "Lycium bush"; mimosae Towns. & Ckll. from Mexico 

 on Mimosa; parvula Ckll. from Mexico on Mimosa; simillima Ckll. from 

 Paraguay; viburni Sign, from France, England, Wales, Massachusetts on 

 Viburnum, Spiraea, Prinos, Hedera; zapotlana Ckll. from Mexico on copal. 



Stotzia Marchal. This genus includes a single species, striata 

 Marchal, from Algeria on Ephedra. 



Euphillipia Berl. & Silv. A single species, olivina Berl. & Silv., 

 occurs on olive in Italy. 



Eriochitin Mask. A genus containing three species from New 

 Zealand and India, hispidus Mask, from New Zealand on Olearia; 

 spinosus Mask, from New Zealand on Atherosperma, Melicope, Elaeo- 

 carpus, Muhlenbeckia, and theae Green from India on tea-plant. 



Mallococcus Mask. Two species are described, sinensis Mask, 

 from China on Callicarpa and lanigerus Hemp, from Brazil. 



Austrolichtensia Ckll. A single species, hakearum Fuller, oc- 

 curs in Australia on Hakea. 



