168 



C. SASAKI. 



Female Insect. — Body oval or nearly roundish, flattened and 

 covered sparsely with fine short hairs and marked more or less distinctly 

 with segment lines. The color is light yellow, while the last segment 

 or pygidium is orange yellow. The largest specimen is 1.279 mm. in 

 length and 0,979 mm. in breadth (Fig. 2. Tab. IV.). 



The Antern nœ (Fig. 3. pl. Tab. IV.) lie ventrally, wide apart from 

 each other, close to the front margin of the body and far distant from the 

 insertion of the mouth parts. Each antenna is represented by two small 

 spine-like processes (one is shorter than the other), which are grown on 

 a short conical protuberance lying in a depression formed on the skin. 



The caudal end of the pygidium is provided with two pairs of lobes 

 and number of the so called plates or spines (Fig. 4. Tab IV.). The first 

 pair of the lobes (mesal lobe) which are much larger than the second, is 

 broad, flattened with an even free edge, while its outer margin is marked 

 with a wide notch. The second pair is smaller and about one half 

 the size of the first. Its distal free edge is more or less inclined so as to 

 form a sort of blunt process at one end of the edge. The outer margin is 

 once, twice or even thrice notched and in the case of the presence of two 

 or more notches, the outer margin shows a wavy appearance. Between 

 the mesal lobes as well as the mesal and the second lobes, there are 

 one or two spines or plates, which end with two or three small pointed 

 processes. Along the lateral margin of the pygidium lying between the 

 second lobes and a penultimate segment, there are two sorts of spines. 

 The first are four in number, of which two are either simple or divided 

 into two small processes at the tip. The remaining two are larger and 

 longer than the other two, and serrated at their lateral margin. The 

 second sort of spines is three in number. They are large broad prolong- 

 ations differing in character from the so called spines. Their terminal 

 end is not either pointed or divided into small processes ; but it is conical 

 or nipple-like in form. Its soft and sensitive nature seem to indicate 

 that it is a seat of certain sensation. At the base of the nipple, there 

 are provided always with two spines, so that with a low magnifying 

 power, these broad prolongations look exactly like a spine ended with two 



