MTTILASPTS POMORUM. 195 



Puparium of old adult female (PL XXIV, fig. 4) 

 convex; elongate, widened posteriorly, more or less 

 curved, or when overcrowded frequently contorted. 

 Varies from pale to dark red-brown. Perfect 

 examples farinose, which gives them a greyish 

 appearance. Ventral scale complete ; dusky white, or 

 faintly stained pale red; almost invariably ruptures 

 along the centre. Those of the young adults (PL 

 XXIV, figs. 3, 5) are light or dark madder-brown, 

 frequently with a faint trace of dark green towards 

 the posterior extremity, where the extreme margin is 

 white or greyish. Ventral surface sometimes with 

 the posterior portion a beautiful dark green. Larval 

 exuviae dark orange-yellow; paler in cabinet speci- 

 mens. Second exuviae of the same colour ; secretion- 

 ary covering thin. 



The foregoing description of the old adult puparia 

 is from examples on apple bark; that of the young 

 adult from examples on apple leaves. 



Long. 2 3 mm. 



Puparium of second-stage female (PL XXIV, fig. 6) 

 narrowly pyriform, convex ; yellowish or pale reddish 

 brown and farinose. Larval exuviae orange-yellow. 



Long. 1 mm. 



Adult female (PL XXIV, fig. 5 ; PL XXV, fig. 1) 

 usually translucent white, sometimes a little yellowish, 

 extremity of pygidium orange -yellow ; elongated, seg- 

 mentation distinct; cephalic segment faintly trilobate. 

 Rudimentary antennae with two to three spiny hairs. 

 Anterior parastigmatic glands from three to six in 

 number. There are no posterior groups, but a little 

 posterior to the spiracles are usually three simple 

 glands. The last two or three free abdominal seg- 

 ments with a few spines. All free segments from 

 base of the thoracic area with numerous tubular 

 spinnerets. Pygidium (PL XXVI, fig. 2) with five 

 groups of circumgenital glands, subject to great 

 variation in number. 



