The Philippine Journal of Science 



DESCRIPTIONS 



Adult female. — Hemispherical in form, the thoracic region 

 strongly convex and barnaclelike (Plate 2, figs. 14, 15,, 16). 

 Average size about 1.2 to 1.5 millimeters in diameter. During 

 pregnancy the body of the female gradually becomes enlarged 

 and at the end of oviposition is nearly globular in form when 

 attached to the host singly, but naturally more or less deformed 

 by mutual pressure when congregated in numbers (Plate 2, 

 fig. 2). The diameter of the largest ones observed was over 

 10 millimeters. The dorsal surface is dark reddish brown with 

 blackish patches of various sizes over the entire surface. The 

 minute pores are found near the small patches, and from these 

 is excreted the waxy substance that covers the surface. The 

 ventral surface is pale yellow. 



The margin of the body is provided with a row of sharp 

 spines, of which the longest observed was about 42 p. The 

 thoracic incisions are shallow, each with five or more blunt spines 

 (Plate 1, fig. 1, c), these being slightly longer than the marginal 

 one and subequal in length. A row of about twenty pores ex- 

 tends from the spiracle to the margin. The mouth parts are 

 well chitinized, with the rostral setae short. The antennae and 

 legs are rather small and weak. 



The antennae (Plate 1, fig. 1, a) are of six joints, 2 joint 3 the 

 longest and 6 next to the longest, each joint with fine hairs, 

 these being most numerous on the apical joint. The measure- 

 ments of the antennal joints in microns are as follows : 3 



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The three pairs of legs are similar in general shape, slender, 

 with a few fine hairs; femora slightly enlarged at the middle 



2 Sasaki (17) states that the young female possesses 8- instead of 6- jointed 

 I measurements the length 



