Characters and Classification. 17 



Adult female retaining^imbs and antennae. Mentum 



dimerous CONCHASPIN^ 



(ii.) Insects with a separate covering-scale composed partly of 

 the exuviae and partly of secretionary matter. Adult fe- 

 male without limbs. Mentum monomerous. DlASPiN^E. 

 j3. Abdomen of female without a definite pygidium. Anal 

 orifice with a definite setiferous ring, 

 (iii.) Females with posterior extremity cleft. Anal orifice 

 closed above by a pair of triangular hinged plates 



forming a valve Lecaniin^. 



(iv.) Adult females with cleft extremity and anal plates as 

 in Lecanimn. Larvae with abdominal lobes as in 



DactylopiincE HEMlCOCCINyE. 



(v.) Abdominal extremity not cleft ; usually with a pair of 

 more or less prominent rounded tubercles, each bearing 

 a long seta. No hinged plates above anal orifice. 



DACTYLOPIIN/E. 



7. Insects enclosed in a resinous cell with three orifices. Adult 

 female apodous, with the terminal segments produced 

 into a tail-like organ bearing at the extremity the anal 

 orifice, which is surrounded by a broken setiferous ring. 

 A prominent spine-like organ above the base of the 

 caudal extension, 

 (vi.) Tachardiin^. 



5. Females without anal tubercles. No setiferous anal ring, 

 (vii.) COCCIN^. 



6. ' Adult females active or stationary ; gall making, or naked, 



or producing cotton or wax. Anal tubercles entirely 

 absent ; anal ring hairless. Antennae with usually less 

 than seven joints. Body not prolonged posteriorly,' 

 (Maskell, Trans. Neiv Zealand Inst., 1892, p. 236). Larvae 

 with anal tubercles, adult without. 



(viii.) IDIOCOCCIN.E. 



Z,. Insects enclosed in galls. Limbs either persisting, rudi- 

 mentary, or obsolete. 



(ix.) BRACHYSCELIN/E. 



B. Males with compound eyes. 



o. Females with definite setiferous anal ring. 



(x.) , Ortheziin^. 



/3. Females without definite setiferous anal ring. 



(xi.) MONOPHLEBIN^. 



D 



