PLATE LXIV. 



Aphis rumicis with parasites. (Page 85.) 



Fig. 1. — Inflated, but empty skin of the pupa of 

 A. rumicis, with the imago of Coryna dubia issuing 

 from the tent-like cocoon, spun below by the larva, 

 and within which it has undergone its metamorphosis. 

 The round hole through which it has made its exit is 

 seen below the tail of the Aphis. 



Fig. 2. — A similar silken tent spun under the exuvige 

 of the same Aphis, but winged. The whole con- 

 tents of the body have been consumed by the parasitic 

 Coryna so as to leave the Aphis skin transparent. The 

 pigmental bands are shown, embedded in the horny skin, 

 proving that these markings are not due to the colour 

 of the viscera, which sometimes is the case. 



Fig. 3. — The cocoon of the last insect in the process 

 of construction and viewed from below, whilst the 

 parasitic larva is in the act of spinning. 



Fig. 4. — A similar tent-like cocoon, viewed also 

 from below, showing the construction of its double 

 walls. The bottom has been partly rent, and this 

 opening brings into view five small pupae of a much 

 smaller parasite, which, in their maggot forms, have 

 consumed the body of the first parasitic Coryna, just as 

 this last has consumed the body of the Aphis. 



