ASPIDIOTUS SHNOSUS. 115 



a little towards the anterior margin ; those of the 

 Iarva3 pale yellow and frequently exposed ; secretionary 

 covering so completely hidden by the woolly fibres as 

 to obscure both form and colour. Ventral surface of 

 scale pale ochreous or greyish ochreous. Ventral 

 scale adhering to plant is moderately thick, and dusky 

 white. Prof. Comstock (7. c.) describes the colour of 

 the scale as " very light brown or dirty white." 



Diam. 1 1*75 mm. 



Adult female pyriform. Pygidium (PL X, fig. 3) 

 rather short. Circumgenital glands in four groups ; 

 the anterior laterals from three to six, the posterior 

 laterals from three to six; they are more or less 

 continuous, and arranged in a single series. Vaginal 

 opening opposite the centre of the grouped glands. 

 Anal opening very small, and placed quite near to the 

 margin. Subdorsal groups of tubular spinnerets, 

 moderately long, are connected with a few compara- 

 tively small dorsal pores. Margin of pygidium (PL 

 XI, fig. 4) with the median lobes well developed, and 

 slightly convergent ; margins straight, with slight notch 

 at the distal extremity. Second and third pairs of 

 lobes small, sometimes quite rudimentary. The median 

 plates are simple and spine-like ; the pair between the 

 median and second lobes deeply and strongly fringed ; 

 there are usually two between the second and third 

 lobes, deeply and irregularly fringed, and either more 

 or less palmate, or shaped somewhat in the form of 

 a table fork; there are from five to seven beyond 

 the third lobe, each deeply divided in one or two 

 places, Avith the outer lateral margins strongly but 

 irregularly serrate. 



The spines are remarkable for their great size. 

 The first is shortest, and placed over the anterior 

 lateral portion of the median lobes, and, in my examples, 

 never extend beyond the latter; the second and third 

 dorsal spines are placed immediately opposite, and 

 extend beyond the second and third lobes respectively ; 

 that over the second lobe is much the largest, and is 



