62 INSECTS NOXIOUS TO AGRICULTURE. 



Group II. LECANIDINJS. 



Female insects flat, convex, or globular ; elongated or cir- 

 cular; naked, or covered with waxy, horny, glassy, cottony, or 

 felted secretion forming a covering or test. Adults sometimes 

 apodous and without antennae. Abdomen in all stages exhibit- 

 ing a more or less denned cleft, and, above or beside it, on the 

 dorsal surface, two more or less conspicuous, roughly triangular, 

 lobes. Men turn usually monomerous or dimerous. 



Male larvae resembling females. Male pupae covered with a 

 test of secretion, waxy or glassy. Male adults not greatly 

 differing from Diaspidinse ; abdominal spike usually short and 

 thick. 



SUBDIVISIONS AND GENERA. 

 SUBDIVISION I. 



Insects covering themselves with a secre- 

 tion, composed chiefly of waxy, horny, or 

 glassy matter LECANODIASPID^:. 



Test of female horny, partly formed of 

 the second pellicle LECANOCHITON. 



Test of female waxy, with a single fringe 

 of broad segments at the edge CTENOCHITON. 



Test of female glassy, elevated, striated 

 with air-cells INGLISIA. 



Not yet represented in New Zealand. 



Test of female waxy, produced into radi- 

 ating branches VINSONIA. 



Test of female waxy, without fringe or 

 branches CEROPLASTES. 



Test of female waxy, elevated, not striated 

 with air-cells FAIRMAIRIA. 



Tests agglomerated in a waxy mass con- 

 taining colonies of insects, male and fe- 

 male CARTERIA. 



Test of female absent ; tests of males 

 aggregated in a waxy mass ERICERUS. 



