THE CODLING MOTH IN THE OZARKS. 



29 



NUMBER OF MOLTS. 



A large number of larvae were reared separately in pieces of apple 

 in vials. Immediately after hatching they were transferred to the 

 vials, and were examined daily, or at least every second day. At 

 each examination they were changed to fresh food. 



Either the frequent disturbance or the lack of apple seeds in their 

 diet caused the larvae to develop very slowly and to become dwarfed. 

 The mature larvae were very much undersized, and some of the moths 

 that developed from them were scarcely larger than adults of the 

 lesser apple worm (Enarmonia prunivora Walsh). 



The normal number of molts is apparently 6 (7 instars), though 

 3 of the 12 larvae that reached maturity molted 7 times (8 instars). 

 The period of development was so much lengthened and the larvae 

 were so dwarfed that no conclusions can be given as to the normal 

 length of the various instars or the size of the larva in each. 



In Table XXXV are given the individual records (omitting meas- 

 urements) of the 12 larvae that reached maturity. 



Table XXXV. — Number of molts of the codling moth — laboratory observations on 

 larvx reared in pieces of apple in vials. 



Individual 



When 

 hatched. 



Molts. 



Larva 

 formed 

 cocoon. 



No. 



I. 



II. 



III. 



IV. 



V. 



VI. 



VII. 



1 



Aug. 17 



...do 



...do 



...do 



...do 



...do 



Aug. 18 

 Sept. 3 



'.'.'.do'.'."'. 

 ...do 



...do 



Aug. 21 



"Aug! '23' 



...do 



Aug. 24 

 Aug. 23 

 Aug. 24 

 Sept. 9. 



...do 



Sept. 8 

 Sept. 9 

 Sept. 8 





Sept. 2 

 Sept. 1 

 Sept. 4 

 Sept. 2 

 Sept. 4 

 Sept. 1 

 Sept. 3 

 Sept. 21 



Sept. 9 



Sept. 7 

 Sept. 10 

 Sept. 8 

 Sept. 11 

 Sept. 8 

 Sept. 10 

 Sept. 29 

 Oct. 2 

 Sept. 29 

 Oct. 2 

 Sept. 28 



Sept. 16 

 Sept. 14 

 Sept. 16 

 Sept. 19 

 Sept. 17 



Sept/lY 

 Oct. 13 

 Oct. 11 

 Oct. 13 

 Oct. 15 

 ...do 



Sept. 26 

 Sept. 21 

 Sept. 27 





Oct. 13 



2 . 



Aug. 28 

 Aug. 29 



Aug. 29 

 Aug. 28 

 Aug. 29 

 Sept. 14 



Sept. 15* 



...do 



Sept. 13 





Oct. 6 



3 





Oct. 15 



4 





Oct. 7 



5 .. 



Sept. 27 

 Sept. 30 

 Oct. 3 

 Oct. 30 

 Oct. 23 

 Oct. 25 

 Oct. 28 

 Oct. 25 





Oct. 16 



6 



7 



Oct. 19 



Oct. 26 

 Oct. 21 



8 



Nov. 20 

 Nov. 9 



Dec. 4 



9 



10 



Dec. 2 



Nov. 20 



11 



'.'.'.'.'.'.'.... 



" Sept." 26" 





Nov. 27 



12 





Nov. 17 









NATURAL ENEMIES. 



On May 6, while bagging fruit and collecting codling-moth eggs, 

 about a dozen specimens of a red mite (determined by Mr. N. Banks as 

 Trombidium sp.) were observed crawling about the twigs and leaves. 

 By accident one of them got into the box of collected codling-moth 

 eggs on leaves. On examining the eggs in the laboratory later, the 

 mite was found in the act of eating one of them. The egg upon 

 which it was operating was in the black-spot stage. When the mite 

 had finished, the egg had the appearance of having hatched, except 

 that the black head and cervical shield of the embryo remained visible 

 underneath the egg shell. The mite was then allowed to attack a 

 larva that was just issuing from the egg, having crawled nearly all the 



