Article XIII. — Descriptions of fiAie Nmjo Sjyecies of Scale 

 Insects, with Notes. ^-^ Willis Grant Johnson, A. M. 



ASPIDIOTUS BOUCHE. 



Aspidiotus forbesi sp. n. (Plate XXIX., Fig. 1-5.) 



Scale of female. — The general shape of the scale of the 

 female is nearly circular (see Plate XXIX., Fig. 1, J), 

 but it varies according to the position of attachment, 

 as scales under a fold in the bark or on some uneven sur- 

 face are very irregular in outline. The color is dirty 

 grayish in fresh specimens, but darker when driel. The 

 exuviae are usually slightly to one side of the center, 

 and covered with excretion; the nipple-like prominence 

 in rubbed specimens is reddish or 3'ellowish brown, sur- 

 rounded by a band a little darker than the margin. 

 Scale rather convex, delicate, and easily torn when re- 

 moved from fresh material. It varies considerably in 

 size, the average diameter being about 2 mm. 



Scale of male. — The scale of the male is elongate-oval 

 (Plate XXIX., Fig. 1, c), and is darker and not so deli- 

 cate as the scale of the female. Nipple-like prominence 

 situated between the center and the anterior margin, 

 usually covered with excretion, and when rubbed or broken 

 of about the same color as that of the female scale. 

 Margins thin and delicate, and lighter than the rest of 

 the scale. Length about 1 mm., width about 5 mm. 



Eggs. — The eggs are pale yellow, elongate oval, and 

 about .22 mm. long by .12 mm. wide. 



Young. — The young larva (Plate XXIX., Fig. 5), when 

 first hatched, is pale yellow and of the general outline 

 shown in the figure. Anteunse apparently five-jointed and 

 lighter colored than body; last joint as long or longer 

 than the combined leiigth of the other four. Eyes prom- 

 inent, brownish or purplisli black. Legs stout and lighter 



