88 INSECTS NOXIOUS TO AGRICULTURE. 



Group IV. COCCIDIN2E. 



Adult females variable in form and colour ; body segmented, 

 the segments more or less conspicuous ; naked, or covered with 

 secretion which is mealy, cottony, felted, or waxy ; active or 

 stationary. No abdominal cleft or dorsal lobes ; abdomen end- 

 ing in two more or less conspicuous protruding processes, or 

 "anal tubercles." Mentum, when present, bi- or tri-articulate. 



Larvae exhibiting anal tubercles as in adult. 



Adult males of general form of the family : abdominal spike 

 usually short. Antennae usually of ten joints. Eyes often 

 facetted. 



SUBDIVISIONS AND GENERA. 

 SUBDIVISION I. 



Adult females stationary; naked, or 

 covered with cottony or felted secretion; 

 antennae of not more than seven joints ; ano- 

 genital ring with six or eight short hairs ; 

 anal tubercles conspicuous. Eyes of male 

 not facetted AcANTHOCOCCHLE. 



Adult female enclosed in closely-felted or 

 waxy sac with double glassy fringe ; apodous 

 and without antennae PLANCH ONI A. 



Adult females enclosed in a felted sac 

 without fringe; retaining feet and antennae ERIOCOCCUS. 



Adult females naked; retaining feet and 

 antennae RHIZOCOCCUS. 



Genera not yet represented in New Zealand. 



Adult females lying on cushion of cotton ; 

 apodous and without antennae NIDULARIA. 



Adult females lying on cushion of cotton ; 

 retaining feet and antennae GOSSYPARIA. 



Adult females enclosed in a cottony sac ; 

 apodous ; with or without antennae ; excreting 

 from the abdomen a very long cottony ap- 

 pendage ANTONINA. 



