CLASSIFICATION 59 



long as either of other pairs; antennae, if 

 present, consisting of less than seven segments, 

 often vestigial or wanting; adult male with 

 ocellanae. Cylindeococcinae. 



h. Mouth-parts always wanting in adult female; 

 adult male with compound eyes. 



i. Prothoracic legs of adult female and male not 



greatly thickened and fitted for digging, normal 



in form; insects arboreal. 



j. Abdomen normal in form, all segments fully 



exposed, none of them infolded or invaginated 



to form marsupial pouch for carrying eggs; 



anus and vulva always opening to exterior; 



abdominal spiracles, when present, usually 



consisting of more than three pairs. 



k. Abdomen of adult female usually with less 



than eight pairs of spiracles, if with eight 



pairs, spiracles never open and their spir- 



acular tracheae never provided with one 



or more rings of cerores; rectum of nym- 



phal females never strongly chitinized and 



forming a rectal tube, never bearing ana- 



cerores; antennae consisting of eight to 



ten segments. Kuwaniinae. 



kk. Abdomen of adult female with six to 

 eight pairs of spiracles, spiracles usually 

 large and broad and open with spiracular 

 tracheae with one or more rings of cerores; 

 rectum of nymphal females strongly chit- 

 inized, forming tube bearing one or more 

 rings of anacerores which excrete long 

 glassy hair-like tube eight to ten times as 

 long as entire body; antennae consisting of 



five to eleven segments. Xylococcinae. 



jj. Abdomen abnormal in form, only two or three 

 cephalic segments exposed, remainder in- 

 folded or invaginated to form marsupial 

 pouch for carrying eggs; anus and vulva 

 never opening to exterior but within and at 

 cephalic end of marsupial pouch; abdominal 

 spiracles limited to segments one to three; 

 antennae consisting of ten to eleven seg- 

 ments. CaXLIPjU'PINAE. 



ii. Prothoracic legs of the adult female and male 

 always thickened and fitted for digging, fossor- 

 ial; insects root inhabiting; antennae consist- 

 ing of eleven segments M.\rgarodinae. 



gg. Adult female usually with anal ring with anal ring 

 setae, if without, female nymphs always provided 



