438 THE COCCIDAE 



second incisurae subequal and symmetrical. Mexico on 

 "Barenjeno Chiquito." diffinis parrotti Newell. 



cc. Pygidium with plates in incisurae; median pair of lobes promi- 

 nent, nearly as long as broad, mesal margins subadjacent, lat- 

 eral notch, sometimes wanting; second pair of lobes longer 

 than broad, sometimes with lateral notch; third pair of lobes 

 inconspicuous, small, pointed; second and third incisurae with 

 densariae, mesal margin longest and stouter than lateral; 

 plates in incisurae small, furcapectinae and one plate on lateres, 

 arranged 0, 1, 2, 6, those of each lateris arranged 3-1-1-1, plate 

 at cephalic end, swollen at proximal end; anus about seven 

 times its width from caudal margin and about twelve times 

 from vulva; mesal calles fused, distant from lateral calles, each 

 of latter only about three times as long as broad. Cuba on 

 Faberna. fabernii Houser. 



bb. Pygidium without pectinae or plates on lateres, arranged 0, 1, 0, 

 0; median pair of lobes large, broader than long, two mesal and 

 one lateral notch, bluntly rounded; second and third pairs of 

 lobes small, crenulate, rounded, inconspicuous; lateres crenulate; 

 setae long, projecting beyond median pair of lobes; mesal calles 

 fused and widely separated from lateral calles; anus near caudal 

 margin; densariae of second and third incisurae distinct, want- 

 ing between median pair of lobes. Canary Islands on Laurus, 



Apollonias. aonidioides Lindgr. 



SPECIES OF COMSTOCKASPIS 

 a. Pygidium with pectinae on each lateris. 



b. Pygidium with median pair of lobes with lateral notch, distal end 

 broadly rounded, mesal margins not distant; second pair of lobes 

 minute, only slightly projecting, distal margin broadly emarginate 

 or with broad lateral notch; plates small, arranged 2, 2, 6, those 

 of each lateris arranged in two groups, one group associated third 

 densariae and a group of three pectinae located cephalad of ce- 

 phalic group of plates. Aspidiotus perniciosus albopunctatus 

 Ckll., Aspidiotus perniciosus andromelas Ckll. Canada, United 

 States, Chili, Hawaiian Islands, Japan, China, Australia, Germany 

 on apple, pear, peach, quince, apricot, plum, walnut, almond, pop- 

 lar, chestnut, sumac, catalpa, willow, osage-orange, linden, ash, 

 elm, dogwood, orange, lemon, elder, maple, rose, currant, raspberry, 

 pecan, milkweed, spruce, cedar, etc. perniciosa Comst. 



bb. Pygidium with median pair of lobes with mesal and lateral notch. 



c. Pygidium with six pectinae on each lateris, pectinae long, well 

 developed, much longer than setae, arranged 2, 2, 6, those of 

 each lateris unapectinae, deeply lacinate; median pair of lobes 

 large, projecting, constricted at proximal end, triangular, 

 strongly emarginate on lateral margin, small notch on mesal 

 margin; second pair of lobes subadjacent to median, similar in 

 form, much smaller, single lateral notch; dorsal oraceratubae 

 in longitudinal rows. South Algeria on Zi\la,.--seurati Marchal. 



