364 THE COCCIDAE 



second pair of lobes hardly half length of first, much narrower; each 

 lateris with angular prominence like third lobe, cephalad of this irreg- 

 ularly crenulate; setae large; plates cephalad of second and third 

 lobes quite large, broad ; scale of adult female convex, exuviae lateral, 

 within margin, first exuvia at margin of second. Mexico on Mimosa, 



?Acacia. dentilobia Ckll. 



aa. Pygidium with one pair of lobes. 



b. Pygidium with median pair of lobes broad, low, broader than 

 long, close together, not adjacent, hardly projecting; plates want- 

 ing; lateres irregularly dentate, crenulate between dentations; 

 apparently with three or four altaceratubae ; scale of adult female 

 flat, irregular, round to suboval, exuviae lateral to sublateral; 



scale of male mytiliform, exuvia at end. Arizona on Larrea 



larreae Ckll. 



bb. Pygidium with median pair of lobes large and prominent, not 

 broader than long. 



c. Pygidium with anus located near vulva, five times its width 

 from caudal margin and eighteen times its width caudad of 

 vulva; median pair of lobes large, prominent, mesal margins 

 parallel, near together, prominent lateral notch, distal end 

 rounded; setae as long as lobes; plates short, dagger-shaped, 

 arranged 0, 3, those of each lateris distant and located on 

 caudal one-fourth of pygidium; altaceratubae apparently want- 

 ing; dorsal oraceratubae few in number, promiscuously ar- 

 ranged; mesal calles present and fused, lateral calles short 

 and distant from mesal. Apparently not congeneric. California 



on Atriplex. atriplicis Ferris. 



-cc, Pygidium with anus and vulva superimposed, about eleven 

 times its width from caudal margin; median pair of lobes 

 large, widely separated, prominent, broader than long, mar- 

 gins broadly rounded, crenulate; lateres broadly irregularly 

 crenulate, caudal crenulation in position of second pair of 

 lobes; plates wanting; altaceratubae apparently wanting; dor- 

 sal oraceratubae fairly numerous, small, irregularly arranged. 



Apparently not congeneric. California on Phoradendron 



multipora Ferris. 



SPECIES OF VERSICULASPIS 



Pygidium with deep angular pygidial incision; median pair of lobes 

 located in pygidial incision, not projecting beyond its margin, dis- 

 tant, suboblique, divergent, not confluent, margin serrate, subtruncate; 

 second pair of lobes apparently incised, triangular, bluntly pointed; 

 plates apparently wanting; altaceratubae small, slender, apparently 

 numerous; brevaceratubae apparently few in number. South Africa 

 on Diosma. diosmae Brain. 



SPECIES OF PROTODIASPIS 

 JSL. Pygidium with two pairs of lobes. 



b. Pygidium with four very low, broad, rounded, colorless lobes, 

 distant, margins inclined to be crenulate; plates wanting; setae 



