18 PAPERS ON COCCTD.E OE SCALE INSECTS. 



The fact that this insect occurs on native plants, as indicated by 

 Mr. Ijounsbiiry, and also that it is rather abundantly parasitized, 

 further emphasizes the probability that it is an indigenous species. 

 Some descriptive notes of the different lots of material follow: 



Original material received from W. J. Palmer, Bloemfontein (letter 

 of November 4, 1907): 

 " (1) On Gleditsia triacanthos: Type of description. 



(2) On ScMnus- molle (pepper tree) : Typical, except for a slightly 

 more prominent development of dorsal pores, and a much lighter 

 coloring of the scale secretion. When occurring on this food plant 

 the scale is light yellowish brown, almost buff', but otherwise normal. 

 Such variation in coloring is sometimes seen in the San Jose scale, 

 and may be clue purely to the food plant. 



(3) On fig: Typical, save for a single anterior lateral circumgenital 

 gland in two females out of eight examined. 



(4) On almond: Typical, save for two rudimentary glands in one 

 specimen. These glands in the specimens on fig and almond were 

 not noted in the first examination. 



(5) -On quince: Typical. 



Material received from Charles P. Lounsburj" (letter of January 29, 

 1908) : 



(1) On pear. Hex River, Cape Colony, November 17, 1907, three 

 females: Tj^^pical, except that they show scattering paragenitals, as 

 follows : 































2-1 



0-0 



0-1 



1-2 



3-2 



1-1 



0-0 



1-2 



1-1 



1-0 



1-1 



1-1 



1-1 



0-0 



Scales reddish brown, with nipple and ring as in perniciosus; when 

 rubbed, exposing exuvia as in perniciosus. 



(2) On Kieffer pear, Prospect Farm, Komgha (east of Cape Col- 

 ony), September, 1905: Scale similar to last, but with central nipple 

 and ring less prominent; pygidium rather produced or triangidar; 

 dorsal pores numerous and prominent, arranged in two or more irreg- 

 ular rows on each side, the first extending from the second incision. 

 Paragenitals : 











1 











2-3 



2-4 



2-2 



2-1 



1-1 



2-2 



2-2 



2-2 



2-2 



1-2 



(3) On fig, Paarl, Cape Colony, November 8, 1907; 11 females 

 examined: Typical in character of dorsal pores. Paragenitals absent 

 or very few. Color of scales modified by the reddish-brown super- 

 ficial layers of the bark which are carried over the scale; evidently 



