PoniDtia C( 



Clareniont, California 



33 



Lingula partially obscured, spatulate, distal end spherical and 

 densely setose. The submarginal area bears a continuous row of 

 conspicuous circular pores which are about 0.014 mm. in diameter 

 and which project somewhat from the case. The submarginal 

 area is set off from the dorsum proper by a raised ridge which is 

 continuous around the case save in the cephalic region. The cren- 

 ulations of the margin are broad and well rounded, the incisions 

 shallow. Marginal wax tubes project mesad about one-third the 

 width of the margin. Thoracic tracheal folds not evident. A pair 

 of fine, delicate caudal spines are present just within the caudal 

 margin, set in tubercled bases. On the suture lines extending 

 cephalad from the vasiform orifice is a pair of very fine delicate 

 hairs set in circular bases. Cephalo-lateral and caudo-lateral mar- 

 ginal spines are lacking. 



Adult : — Length about 0.65 mm. ; color yellow with the head 

 and thorax lighter. Eyes dark red, constricted but not divided. 

 Wings immaculate, forewing with Radius 1, cubitus and media 

 present; media short, faint and poorly defined. Paronychium 

 blade-like. The antennae of all specimens were broken. 



Described from material taken by F. W. Herbert, for whom 

 the species is named, at Pleasanton, Alameda County, October 1918, 



Fig. 4. Tetraleurodes herheti n. sp. a, pupa-case; b, vasiform orifice. 



