Coccidae of Japan, V 



S. I. KUWANA 



IMPERIAL AGEICULTURAl, EXPERIMENT STATION 



NISHIQAHAEA, TOKYO, JAPAN 



I. Xylococcus napiformis n. sp. 

 (Plate I, Figs. 1-9) 



Adult female — Napiform, skin smooth and polished; yellowish 

 brown with dark brown codal tubercle. Mouth parts large, 

 rostral setae long. Antennae and legs completely wanting. Codal 

 tubercle bears very long white hair-like threads. 



Egg — Elliptical, pale pinkish with pink spot. Length, 0.34 

 mm. ; width, 0.17 mm. 



First larval stage — Elliptical in form ; pinkish purple in color. 

 Antennae composed of three segments; segment III the longest 

 and bears several rather long hairs. Legs rather slender ; femur 

 very short ; claw very large and curved ; digitules wanting. 

 Lateral margin of abdominal segments with a series of strong 

 spines. Anal opening bears four large rod-like processes. Ab- 

 dominal end with two very long hairs. Length, 0.40 mm. ; width, 

 0.19 mm. 



Habitat — On Quercus serata, collected by the writer and others 

 at Nishigahara, Tokyo, and other places of the empire. The body 

 of female is imbedded in the tissues of bark of the host plant 

 and the position of the insect is indicated by a gall-like swelling 

 on the surface. To Mr. T. D. A. Oockerell, the writer is under 

 great obligations for assistance in the determination of the 

 species. 



II. Phenacoccus azalece n. sp. 

 (Plate II, Figs. 10-12) 



Adult female — Elliptical in form, tapering toward the anal 

 end ; pale brick to brick in color with the median line paler ; legs 

 and antennae are a little brown ; thinly covered with snow-white 

 cottony secretion. Ovisac elongated, sides nearly paralleled, 



