ASPIDTOTUS OSTEE^FOEMIS. 99 



ASPIDIOTUS OSTEEyEFOEMJS (Curtis). 



(PL V, figs. 114; PL VII, fig. 2; PL XII, fig. 1.) 



Aspidiotus ostreseformis, Curtis (Ruricola) ; Gar- 

 dener's Chron., 1843, p. 805, with fig. . 



Nee Dlaspis ostre&formis, Signoret; Essai s. 1. 

 Coclien., p. 121, pi. v, fig. 4. 



Nee Diaspis ostrezeformis, Comstock; Report, 1880, 

 p. 311, pi. xv, fig. 4. 



Aspidiotus betulse, Barensprung ; Journal d'Alton et 

 Burm., 1849. 



Aspidiotus Mice (Bouche), Leonardi; Gen. e sp. di 

 Diaspiti. Est. dal. Ri vista di Patologia Vegetal e, 

 ^1897 [VI], 1900 [VIII], p. 65. 



Aspidiotus liippocastani (Signoret), Leonardi, 1. c. 



Aspidiotus oxyacanthae ? (Signoret), Leonardi, 1. c. 



Aspidiotus tilice (Signoret), Leonardi, 1. c. 



Aspidiotus spurcatus, Signoret Essai, p. 112, pi. iv, 

 fig. 8. 



Puparium of adult female (PL V, figs. 1 3) more 

 or less circular and moderately convex ; examples dis* 

 torted by overcrowding, or compressed by contact with 

 a prominent portion of the food-plant, very variable ; 

 texture smooth. The central third is usually olivace- 

 ous black, the remainder dusky ochreous or dark grey. 

 ExuviaB central or, towards the margin in front, dull 

 yellow or bright orange yellow. Secretionary cover- 

 ings grey or white, the first forming a small central 

 boss, the second in the form of a broad concentric ring. 

 A young example is shown at Fig. 2. The foregoing 

 description applies to typical examples such as one 

 finds upon the smooth, young wood of the currant or 

 plum, and which are absolutely free from the admixture 

 of the surface-tissues of the food-plant. On the old 

 wood of the peach the scales are much thicker, almost 

 entirely olivaceous black, and almost completely hidden 



