(526 REVISTA CHILENA UE HISTORIA NATURAL 



VIL Sub-marginal urea with elevated and papil- 



lae-like folds Aleuromirjda 



Sub-raarginal área without elevated and pa- 



pillae-like folds 8 



VIII. Vasiform orífice subcordate, surrounded 

 by a defiuite lobed área with a channel ex- 

 teuding candad AleuroloJms 



Vasiform orífice rounded or cordata, elevated 

 and not snrrounded by a lobed or pálmate 

 área Tetraleurodes 



IX. Pupa case witli thoracic folds present 10 



Pupa case with thoracic folds not present.... 12 



X. Thoracic tracheal folds ending in a comb of 



teeth 11 



Thoracic tracheal folds not ending iu a comb 

 of teeth, but in a more or less circular 

 pore iJialeurodes 



XI. Vasiform orífice small, transversely rounded, 

 operculum almost entirely filling it Aleuroplaiiis 



Vasiform orífice subcordate, acute candad, 

 rounded, operculum filling 2.3 of orífice, 

 and leavíng candad portion of Úngula ex- 

 posed Asterochiton 



XII. Dorsal disk deflexed to meet shortened 

 ventral disk, marginal wax pores showing 

 tlirough ventral disk Tetra I icio 



Dorsal disk flattened with margin showing as 



usual 13 



XIII. Vasiform orífice situated in a pit or de- 

 pression which is usually transversely rib- , . 



bed or furroAVed Pealhis 



Vasiform orífice not situated in a pit 14 



XÍV. Língula long, extending candad one-half 



to one-third of its length 15 



Língula short and obscnred by operculum 18 



XV. Vasiform orífice triangular, very elongate. Beniesia 

 Vasiform orífice sub-cordate 16 



XVI. Vasiform orífice with cephalic margins 

 straight, língula not kuobbed 17 



Vasiform orífice with cephalic margins cur- 



ved, língula knobbed Aleurotuliis 



