118 ASPIDIOTUS BRITANNICUS. 



Vaginal opening a little in front of the centre. Anal 

 opening midway between the former and the apex. 

 The groups of tubular spinnerets long ; the longest 

 extending almost to the base of the pygidium ; con- 

 necting pores, towards the margin, occur on both 

 dorsal and ventral surface. Margin of pygidium (PI. 

 XII, fig. 4) with three pairs of well-developed and 

 widely separated lobes ; the median and second pairs, 

 subequal, are notched or emarginate at the distal ex- 

 tremity of the margins, giving them a decided trilobed 

 appearance ; the third pair, smallest, usually have the 

 inner lateral margins complete, the outer lateral 

 margin with a notch at the extremity, or the hind 

 margin irregularly notched. Plates comparatively 

 short ; median, second, and third pairs narrow, with 

 one to three apical divisions ; the first beyond the 

 third lobe is also narrow, and serrated on its outer 

 lateral margin; the two next very broad, have a 

 deep central cleft ; the posterior half simple or with a 

 divided apex, the anterior half strongly serrate on 

 the outer lateral margin ; the last plate is generally 

 short and serrated in the same way as the previous 

 ones. Two spines only were observed, the first op- 

 posite the third lobe, the second beyond the fringe; 

 others probably exist, but my specimens were much 

 too badly infested with fungi to ascertain this. 



Puparium of the male (PI. VIII, fig. 11) similar to that 

 of the second-stage female ; more or less circular, con- 

 tracted forms elongate or widely ovate. Colour bright 

 pale fulvous. Larval exuvias central, usually bright 

 orange-ochreous ; secretionary covering thin, smooth, 

 and transparent, so that the colour of the sublying 

 exuviae shows through. The above description applies 

 to such specimens as one finds upon the under sides of 

 the leaves ; those found in exposed situations are 

 much darker, and often partly covered with a sooty 

 deposit. 



Diameter 1 mm. 



Habitat. On holly (Ilex spp.) at Teddington, near 



