Diaspince. 3 7 



reasonable limits. Abnormal forms will be found in nearly every 

 genus. 



SYNOPSIS OF GENERA. 



A. Male puparium similar in general form and structure to that of 

 the female. 

 a. Pellicles of female completely superposed, and in both sexes 

 more or less centrally situated. 

 (i) Female puparium sub-circular. Pellicles surrounded by 

 a broad secretionary supplement. Circumgenital 

 glands in not more than five groups. Male puparium 

 similar to female, but more oblong. (P/. I. fig. 7.) 



ASPIDIOTUS. 

 (ii) Puparia as in preceding genus. Circumgenital glands in 



more than five groups (COMSTOCKIELLA.) 



(iii) Female puparium occupied almost completely by the 

 greatly enlarged second pellicle with little or no se- 

 cretionary supplement. Adult female reduced in size 

 and enclosed within the second pellicle. Male pupa- 

 rium sub-circular ; the pellicle surrounded by a broad 



secretionary supplement. (P/. \- fig- 2) AONIDIA. 



/3. Pellicles of female overlapping, and in both sexes placed at 

 or close to the anterior extremity. 

 (iv) Female puparium broadly elliptical. Second pellicle large, 

 with a moderate secretionary supplement. Pygidium 

 with a continuous marginal series of broad fimbriated 

 squames and large semilunar pores. Circumgenital 

 glands in four groups. Male puparium irregularly 

 elliptical; rather depressed. {PL \. fig- 6.) 



(Parlatoria.) 



(v) Female puparium elongate ; with a moderately large 



secretionary supplement behind. Margin of pygidium 



as in preceding genus. Circumgenital glands in five 



groups. Male puparium smaller and narrower. 



(Syngenaspis.) 

 (vi) Female puparium usually elongate and narrow. Circum- 

 genital glands in five groups. Male puparium similar 

 to that of female, but smaller ; the hinder extremity 

 often with a hinge-like structure to allow of the easy 

 exit of the adult insect. {^Pl. I- fig. 5.) Mytilaspis. 



