170 



C. SASAKI. 



with a single claw, from the insertion of which are grown two long hairs 

 bearing a small globule on their tip. The abdomen is nearly conical 

 and composed of nine segments. The basal portion of it lying close to 

 the thorax, is nearly of equal breadth with the thorax ; but it is gradually 

 lessened in breadth towards the caudal end, where is provided a single 

 straight pointed style (Fig. G, a ; and G, b. Tab. IV.). The length of the 

 body is 0,36 mm. 



Neivhj Hatched Larva. — The newly hatched larva is oval, yellow 

 and depressed, the length being 0.244 mm. Eyes simple, roundish and 

 nearly transparent. Antennae comparatively stout, long, and composed 

 of five segments, of which a terminal segment is longer than the length 

 of the remaining four, and closely annulated. It bears at the tip two 

 long hairs. The thread-like rostrum, which forms a sort of loop by turn- 

 ing round by itself, lies beneath the epidermis of the ventral surface of 

 the body. All the legs are of equal size and provided with a single claw, 

 from the insertion of which are grown four slender hairs bearing a globule 

 at their end. The caudal end of the abdomen is provided with two large 

 broad lobes, which are notched once at the inner, and twice at the outer 

 sides. At the space lying between the lobes, there lie two stout spines 

 and two long slender caudal hairs. (Fig. 7 ; Fig. 7, a. b. c. Tab. IV.) 



Generation. — I have observed this year our scale allied to Aspidoitus 

 perniciosus, Comstock has undergone two generations ; but I think, it is 

 probable that it may be able to undergo more than two when the climate 

 is favourable to its growth. 



Now a question arises whether the allied species is same with or 

 different from the pernicious scales in America. So far as my examina- 

 tion goes, the form, size and color of the scales of both sexes in the two 

 species show a close similarity ; but the insects differ in certain respects, 

 thus : — The characters of the plates or spines as well as the lobes on the 

 pygiduim and the antenna of the allied species differ in certain degrees, 

 as mentioned before, from the pernicious scale described by Prof. 

 Comstock 2 and also by Mr. T. D. A. Cockerell, 4 



