2i CHAS. K. BRAIN. 



Key to South African Genera. 

 A. Female naked, or only covered by a very thin, inconspicuous film of secretion. 

 B. Adult $ with well-developed legs and antennae. 

 C. Adult 9 with posterior extremity cleft. 



(1) Female flat or slightly convex, derm not very hard when mature, without 



polygonal areas containing pits . . . . Lecanium, Burm., p. 3. 



(2) Female becoming hard and convex at maturity, derm with ± oval or 



polygonal areas containing pits . . Saissetia, Deplan., p. 9. 



CC. Adult 2 with posterior extremity not cleft ; female with four large 

 groups of spinnerets . . . . . . . . Hemilecanium, Newst., p. 14. 



BB. Adult 5 without legs or antennae . . . . . . Aclerda, Sign., p. 15. 



AA. Female secreting a greater or less amount of cottony or powdery matter. 



B. Female naked above, secretion beneath or behind the insect. 



C. Female with only a narrow fringe of secretion. 



(1) Female very convex, dark red, abdominal segmentation very distinct 



Allopulvinaria, gen. no v., p. 16. 



(2) Female flat or slightly convex, segmentation not pronounced, 



Protopulvmaria, Ckll., p. 16. 

 CC. Female secreting a definite protruding ovisac Pulvinaria, Targ., p. 17. 



BB. Female partly covered with secretion. 



(1) Adult $ covered above, except for the median area, with a thick coat of 



wavy threads which project beyond the margin in all directions 



Ceronema, Mask., p. 22. 



(2) Adult $ enclosed in a felted sac, except the cephalic extremity which 



is ± exposed .. .. .. .. . .Lichtensia, Sign., i^. 22. 



BBB. Adult $ entirely enclosed. 



C. Sac fitting closely to body of adult $ at maturity and later serving as 

 ovisac ; insect leaf -infesting . . . . . . . . Filippia, Targ., p. 23. 



CC. Sac felted, stout, conical, insect root-infesting Conofilippia, gen. nov., p. 25. 

 AAlA. Female secretion waxy, glassy or horny. 



B. Covering of ? consisting of wax, generally soft and thick ; no marginal fringe 

 nor marginal processes ; female with a ± conspicuous caudal process visible 

 on removing the wax . . . . . . . . Ceroplastes, Gray, p. 26. 



BB. Covering of $ glassy, or at least brittle, thin. 



(1) Scale divided into plates and striated with rows of air-cells ; not causing 



galls . . . . . . . . . . . . Inglisia, Mask., p. 36. 



(2) As in Inglisia but causing galls on roots of host-plant 



Cryptinglisia, Ckll., p. 38. 



(3) Scale divided into two halves not striated with air-cells, but with grooves 



radiating from apex . . . . . . Parafairmairea, Ckll., p. 39. 



(4) Scale not divided into plates nor two halves, but rough and beset with 



protuberances, legs and antennae well-developed, anal cleft normal 



Geroplastodes, Ckll., p. 40. 



(5) Scale not divided into plates nor two halves, i smooth, legs and antennae 



rudimentary, anal cleft lateral . . . .Idiosaissetia, gen. nov., p. 40. 



(6) Similar to Pulvinaria but ovisac consisting of horny membrane instead 



of cottony matter . . . . . . . . Membranaria, gen. nov., p. 41. 



