70 THE COCCIDAE 



d. Antennae of adult female normally with ten sesments. 



e. Wax excreted by adult female powdery or cottony, soft 

 and indefinite in form, 

 f. Adult female without abdominal spiracles; abdomen 

 normal in form, not with stout erect spine on dorsum; 

 abdomen of male with four pairs of slender lateral fila- 

 ments. Tessarobelus Montr. 



ff. Adult female with distinct abdominal spiracles; abdo- 

 men abnormal in form, with short, stout, erect spine on 

 dorsum shaped like the spine on a military helmet; 



male unknown. Lopococcus Ckll. 



ee. "Wax excreted by adult female definite in form and usually 

 hard, in shape of conspicuous lamellae or processes which 

 conceal body more or less. 

 f. Vulva normal in position and size, not conspicuous, and 

 not covered by hinged flap or valve of wax; male un- 

 known. Walkerifnia Sign. 



ff. Vulva abnormal in size, covered by thin valve or flap 

 of wax hinged at cephalic end, supposed to form a re- 

 ceptacle for the eggs and nymphs; male unknown 



Aspidoproctus Newst. 



dd. Antennae of adult female normally with nine segments, 



body of adult female with powdery or cottony covering of 



wax; cuticle soft; abdomen of male v/ith five pairs of slender 



lateral filaments. Drosicha Walk. 



bb. Antennae of adult female normally v/ith less than nine segments. 

 c. Antennae of adult female normally with eight segments. 

 d. Abdomen of adult female whether provided with spiracles 

 or not, never with large crescent-shaped valve-like structure 

 located between them, 

 e. Abdomen with seven or eight pairs of spiracles. 



f. Abdomen of adult female with eight pairs of spiracles, 

 pair on first abdominal segment; body of adult female 

 enclosed in more or less spherical hard waxy test with 



apical aperture; male unknown Siigmacoccns Hemp. 



ff. Abdomen of adult female, if bearing spiracles, provided 

 with seven pairs of dorsal spiracles, those of first ab- 

 dominal segment wanting; body of adult female not 

 enclosed in spherical hard waxy test, but excreting a 

 distinct ovisac formed of numerous v.iiite threads which 

 sometimes fuse and form a fluted surface; abdomen of 



males with three or four pairs of lateral filaments 



Greeniella MacG. 

 ee. Abdomen v.ith six pairs of spiracles; head between and 

 caudad of antennae with setaceous clypcus-like lobe, cov- 

 ering rostrum in part; antennae consisting of eight to 

 nine segments; setae clavate or knobbed at distal end; 

 body spherical; male unknown Mimosicerya Ckll. 



