242 INSECT KNEMIKS OF THE CODLING MOTH. 



of another only in one case. All the larvae are living,-, as is indi- 

 cated by the movement. 



Codling- egg (b). Four large and two small parasite larvcC 

 are in the codling egg. Their appearance is similar to that of 

 egg (a). 



Codling- egg (c). Four large parasite larv?e are in the 

 codling egg. 



February 15, y a.m. — Codling egg (a) appears the same as 

 the day before in colouring and texture. Only six larva are 

 visible. Note in Fig. (d) that the largest of February 14 are 

 not necessarily the ones that survived. This is determined by 

 the position of the head end in each examination. The margins 

 of the parasite larv?e are slightly darker in colour, caused by 

 the accumulation of very fine black granules, probably the result 

 of a beginning of the breaking down of cells previous to the 

 transformation stage. 



Codling egg {b) is in practically the same state as on Feb- 

 ruary 14. 



February 16, 9 p.m. — Codling egg (a) see Fig. (d). The 

 Iarv?e are still active at the interior ends. The red pigment has 

 practically disappeared. It is indistinct and appears to be scat- 

 tered through the larvae. A peculiar addition is the presence of 

 numerous circular small black cellular bodies in each larva. This 

 probably represents a breaking down of the tissues previous to 

 the transformation of larv.T into pupas. 



Codling eggs (b) and (r) : The larvie are in the same state 

 as those in egg (a). 



February 17, y p.m. — There is practically no change. 



February 18, 9 p.m. — Codling egg {a), see Plate XX (e). 

 There is no longer any movement in the larvae. The parasites have 

 become darker, due to accumulations of fine black granules, 

 and are distinctly oval in shape and slightly smaller. They have 

 lost the characteristic larval form. The small back circular 

 bodies are still evident, but less in number and concentrated near 

 the centre. A little red pigment is still evident in the parasite. 

 This is evidently the prepupal stage of the parasite. 



Codling eggs (b) and (r) : The larvae have become, prepup.e. 

 as in egg (a). 



February 19, 9 p.m. — Codling eggs (a), (b) and (e) : The 

 larvce have now changed to pupae, as indicated by a pair of com- 

 pound, red eyes in each (see Fig (/)). Wings are evident in one 

 pupa. 



February 20. 9 p.m. — The heads are more distinct, and the 

 compound eyes more conspicuous. 



February 21, 9 p.m. — 'Codling egg (a) : In pupa number 3 

 three ocelli are evident. 



Codling egg (b) : Ocelli arc evident in one pupa and wings 

 are evident in two pupa;. 



Codling egg (c) : Ocelli and wings arc (|uitc evident in all. 



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