TRIBE ASPIDIOTINI 391 



jj. Pygidium with median pair of lobes short 

 and broad, broader than long, subrudimen- 

 tary; second pair of lobes long, spatulate, 

 more than twice as long as broad, notched 

 near distal end on lateral margin. Type, 



Aspidiotus maculata Newst 



Par anew steadia MacG. 

 ii. Pygidium with single pair of lobes. 



j. Pygidium with lobes large, projecting promi- 

 nently beyond general contour of margin; 

 each lateris with several plates or pectinae. 



Type, Aspidiotus guterreziae Ckll 



Chorizaspidiotus MacG. 



jj- Pygidium with lobes not prominent, not or 

 hardly projecting beyond general contour of 

 margin; each lateris without plates or pecti- 

 nae. Type, Aspidiotus chenopodii Marl 



Remotaspidiotus MacG. 

 ff. Pygidium with median incisura obliterated by complete 



fusion of median pair of lobes Chentraspis Leon. 



Pygidium always with densariae or paraphyses. 

 f. Pygidium always with densariae. 



g. Pygidium with three pairs of lobes; second and third 

 pairs minute and usually pointed at distal end, some- 

 times plate-like Hemiberlesia Ckll. 



gg- Pygidium with less than three pairs of lobes. 



h. Pygidium with densariae of second incisurae nor- 

 mal in form, 

 i. Pygidium with two pairs of distinct lobes. 



Type, Aspidiotus perniciosus Comst 



Comstockaspis MacG. 

 ii. Pygidium with only single pair of lobes. 



j Pygidium with unapectinae; anus located at 

 least twice its own width from proximal end 

 of median pair of lobes; median pair of lobes 

 with mesal margins parallel and distant; in- 

 sects producing galls upon plants. Type, 



Aspidiotus liquidambaris Kotins 



Chemnaspidiotus MacG. 



jj. Pygidium with plates, if with pectinae, not 

 with unapectinae. Type, Aspidiotus ulmi 



Johns. Hendaspidiotus MacG. 



hh. Pygidium with mesal margin of densariae of each 

 second incisura greatly enlarged, paraphysis-like, 

 three or four times as long as lateral margin, 

 cephalic end circular. Type, Aspidiotus subsimilis 

 anonae Houser. Clavaspis MacG. 



