TRIBE DIASPIDINI 365 



very small; cuticle with numerous oraceratubae; mesogenacerores 

 about 11; anus distinct, fair distance from caudal margin, cuticle 



around anus strongly concentrically striate. — Mexico on oak 



parvula Ckll. 

 bb. Pygidium of adult female with four lobe-like projections; median 

 pair of lobes near together, broader than long, broadly rounded, 

 entire; second pair of lobes incised, mesal lobelet largest, mar- 

 gins rounded, entire; dorsal oraceratubae numerous, small, irreg- 

 ularly arranged; anus large, about fourteen times its width 

 cephalad of caudal margin and about once cephalad of vulva; 

 setae minute; pygidium of second nymphal female with four 

 minute distant subequal lobes, distance betweetti lobes about 

 three times width of lobe; setae few and minute; anus prominent, 

 about five times its width from caudal margin; plates wanting. — 



Arizona on Quercus. pulchra Ferris. 



aa. Pygidium without lobes or lobe-like projections. 



b. Pygidium as broad as or broader than long, margin broadly 

 rounded, not pointed. 

 c. Pygidium with margin coarsely irregularly crenulate, without 

 lobes or plates; setae four in number, moderate in length; 

 anus located distant from caudal margin, around anus a num- 

 ber of conspicuous thin spots in cuticle, appearing as perfora- 

 tions; pygidium of second nymphal female with three plates 

 on each side; spiracerores wanting; surface of body finely 



carinate. — South Africa on Euclea imbricata Brain. 



cc. Pygidium with margin entire, smooth, broadly rounded, bear- 

 ing four minute distant setae; anus small, about eighteen times 

 its width from caudal margin and four times caudad of vulva. — 

 Resembles species of Gymnaspis or Aonidia. — Arizona on 



Acacia. edentata Ferris. 



bb. Pygidium longer than broad, distal portion pointed, never broad- 

 ly rounded; body of adult female more or less globose; pygidium 

 flattened, cordate, acuminate; lobes and plates wanting; margin 

 with two irregular teeth-like projections at caudal end; anus 

 small, near cephalic end, twenty or more times its width from 

 caudal margin; setae minute, one on each side near cephalic end 

 of margin, few on disk; many linear thickenings radiating in- 

 wards from margin; pygidium of second nymphal female broad, 

 rounded, hinged, semicircular plate; setae, lobes, plates, wanting; 



similar to preceding species. — Australia on Acacia 



anomala Green. 



SPECIES OF NUDACHASPIS 

 Insects forming galls upon leaves and stem of host-plant, external open- 

 ing to gall typically closed by first exuvia, second exuvia thin, enclos- 

 ing adult puparium-like in early adult, ruptured later and insect ex- 

 truded; body of insect "comma-shaped," enlarged cephalic portion bent 

 at right angles to caudal portion; pygidium of adult female without 

 lobes, plates, or setae; with seven serrate lobe-like projections on each 

 side, probably pseudolobes, projections disappear with age; altacera- 



