February, 1916.] 



25 



lines radiate to the circumference, those directed to the angles of the plate 

 being the more strongly marked. These radiating line.s are crossed by numerous 

 finer transverse lines, arranged concentrically to the circumference of the plate. 

 The fourth plate is of smaller size but is of similar structure to the previous 

 two. It slopes sharply downwards behind the central prominence, which is 

 directed backwards. The fifth and terminal plate of the dorsal series is a 

 narrow, flat, acutely triangular piece, extending to the posterior extremity and 

 covering the post-anal area of the insect. The lateral plates, of which there 

 are seven on each side, are much smaller : the anterior and posterior plates 

 sub-triangular, the remaining five irregular quadrilateral. They are not so 

 conspicuously striated as are the dorsal plates, but some of them show traces 

 of lines radiating from a point near the centre of the outer margin of each. 

 The greater part of the test is rendered opaque either by the surface sculpturing 

 or by the inclusion of minute air spaces, except upon the central area of the 

 anterior plate, where the covering is transparent, revealing the reddish colour 

 of the contained insect. Length, 5 to 6 mm. Greatest breadth approxi- 

 mately 1 mm. 



Fig. 2. 



Female insect (fig. 2-a), reddish ; conforming to the shape of the test 

 which it at first more or less completely fills. Anterior extremity acutely 

 pointed. Antenna (fig. 2-b; well developed, S-jointed ; 3rd, 5th and 6th joints 



G 



