SUBFAMILY DIASPIDINAE 241 



Diaspis, Aulascapis, Chionaspis, etc., the male scales are easily 

 identified because the secretionary portion is frequently distinctly 

 longitudinally carinate. 



The tribes of Diaspidinae, of which there are six, have been 

 arranged in the order of the following tabulation which indicates 

 something not only as to the relation of the tribes but of their 

 lines of specialization: — 



SYNOPSIS OF THE DIASPIDINAE 



GENERALIZED DIASPIDINAE.— Pygidum with Altaceratubae. 

 Pygidium with Pectinae. 



Preabdomea with Bracteae. 



1. The Fringed Scales. — Paelatoriini. 

 Preabdomen without Bracteae. 



2. The Wihite-shield Scales. — Lehjcaspidini. 

 Pygidium with Plates. 



Brevaceratubae Conservers. 



Altaceratubae opening near Margin. 



3. The Oyster-shell Scales. — Lepidosaphini. 

 Altaceratubae opening in Latadentes. 



4. The Double-shield Scales. — Diaspidini. 



Brevaceratubae Loosers 5. The Uhlerian Scales. — Fioriniini. 



SPECIALIZED DIASPIDINAE.— Pygidium without Altaceratubae. 



6. The Deltoid Scales. — Aspidiotini. 



What is considered as the most generalized condition of the 

 Diaspidinae is found in certain species of Parlatoriini. The re- 

 tention of distapectinae in the Leucaspini, although they have 

 departed considerably from the condition in the parlatoriids, 

 allies them with the latter. The presence of plates allies the 

 Lepidosaphini, Diaspididni, and Fioriniini. In the first two the re- 

 tention of brevaceratubae distinguishes them from the third, 

 while the presence of plates in the mesal incisura of most Lepido- 

 saphini shows a more generalized condition than their absence 

 in most Diaspidini, but the location of the anus much nearer the 

 caudal margin of the pygidium than in the latter would show a 

 more generalized condition for the Diaspidini. The Aspidiotini 

 are without altaceratubae, have pectinae in the generalized genera, 

 plates in the specialized, and the absence of both and the develop- 

 ment of pseudolobes in the most specialized. 



The Parlatoriini, Lepidosaphini, Diaspidini, and Aspidiotini 

 contain among their most highly specialized genera those that 

 transform in a puparium. In the Leucaspini and Fioriniini all or 

 most of the species transform in this way. There is, except in 

 in the last two named tribes, the same line of specialization 



