TRIBE ASPIDIOTINI 449 



straight, near to but not touching, distal and lateral margins 

 convex, lateral angles not conspicuous, faint lateral notch; second 

 pair of lobes long, longer than broad, two distal notches, mesal mar- 

 gin nearly straight, distal and lateral contours pointed; setae, par- 

 ticularly of each lateris, very long, longer than median pair of lobes; 

 each lateris with broad, blunt, tooth-like projections; anus located 

 near caudal margin. Sokotra, Africa on Dracaena, socotrana Lindgr. 

 aa. Pygidium with densariae distinct, caudal one largest, mesal mar- 

 gin much larger, nearly twice, than lateral; median pair of lobes 

 large, mesal margins convex, distant, lateral margin oblique, notched, 

 distal end bluntly rounded; second pair of lobes similar to median, 

 much smaller, lateral notch; setae prominent; oach lateris without 

 tooth-like projections, entire or finely serrate; anus nine times its 

 width from caudal margin. South Africa on Ehretia. ehretiae Brain. 



SPECIES OF TARGIONIDEA 



a. Pygidium with median pair of lobes with three distinct lateral 

 notches, large, triangular, subadjacent, convergent; densariae want- 

 ing in median incisura, large, two margins subequal in second in- 

 cisurae, smaller in third, margins subequal; setae long and stout, 

 longer on median pair of lobes, seven on each side, four dorsal and 

 three ventral; pygidium of first nymph with single pair of lobes and 



without pectinae or plates. Canary Islands on Campylanthus 



campylanthi Lindgr. 



aa. Pygidium with median pair of lobes with single notch, large, pro- 

 jecting, subadjacent; second incisurae bounded by small, unsymmet- 

 rical, triangular, notched, lobe-like projections; densariae of second 

 incisurae with margins subequal; setae long and stout, subequal or 

 longer than median pair of lobes, six on each side, three dorsal 

 and three ventral. Denmark on Euphorbia, Olea. lenticularis Lindgr. 



SPECIES OF CIRCULASPIS 



Pygidium with deep mesal indentation and three others on each side; 

 projections of margin of pygidium between indentations serrate; "con- 

 spicuous cylindrical canal" extending cephalad from mesal cleft over 

 half way to anus, terminating in "brush of small tubular ducts;" dor- 

 sal and ventral surfaces dotted with minute circular pores with thick- 

 ened rims; anus near cephalic end of pygidium; mesospiracerores and 



metaspiracerores numerous. India on bamboo 



canaliculata Green. 



SPECIES OF RUGASPIDIS 



a. Pygidium with three indentations on each side; mesal projection with 

 slight mesal groove; margin of pygidium shallowly crenulate; anus 

 located slightly cephalad of vulva, about fifteen times its width from 

 caudal margin; mesospiracerores present; dorsal oraceratubae nu- 

 merous, irregularly placed. California on grass... graminis Bremner. 

 aa. Pygidium with numerous slight indentations, margin appearing to 

 have three pairs of indefinitely defined lobes with coarse crenula- 

 tions; dorsal oraceratubae numerous, without definite arrangement, 

 associated more or less with wrinkles of surface; setae long, slender. 



