58 



BULLETIN 351, U. S. DEPARTMENT OF AGEICULTUEE. 



In Table XXXVI are recorded data from 14 males that emerged 

 late in the season of 1912. They had the fourth molt delayed to the 

 fiftieth day and give an average of 1.36 days as the time spent under 

 the puparium. Specimen No. 3 partly escaped from under the 

 puparium during the fourth molt. It remained m this position for 

 4 hours and then emerged and started to leave the leaf. 



Table XXXVI. — Emergence of 14 males of the terrapin scale from a brood that made the 

 fourth molt upon the fiftieth day, Mont Alto, Pa., 1912. 



No. 



Fourth molt. 



Emergence. 



Time spent 



under pupa- 



riimi. 



Date. 



Time. 



Date. 



Time. 



1 



Sept. 5 

 Sept. 9 

 Sept. 11 

 ...do 



8.40 a.m.. 

 10 a.m.... 



6a. m 



6a. m 



2p.m 



6 a. m 



Sept. 6 

 Sept. 10 

 Sept. 11 

 Sept. 14 

 Sept. 12 

 ...do 



8.40 a.m.. 



10 a. m 



10 a.m.... 



6a. m 



6a. m 



6p. m 



9a. m 



6a. m 



6a. m 



6a. m 



6a. m 



6a. m 



6a. m 



6a. m 



Bays. Hrs. 

 1 



2 



1 



3 



4 



4 



3 



5 



Sept. 10 

 Sept. 12 

 Sept. 11 

 Sept. 12 

 Sept. 11 

 Sept. 12 

 Sept. 11 

 ...do 



1 16 



6 



12 



7 



12 m 



1 p. m 



2 p. m 



Sept. 14 

 Sept. 13 

 .. do..... 



2 21 



8 



1 17 



9 



1 16 



10 



6 p. m 



12 m 



12 m . .. 



...do 



Sept. 12 



12 



11 



18 



12 . 



18 



13 



Sept. 10 

 ...do 



9 a. m 



...do.... 



1 21 



14 



3 p. m 



...do 



1 15 









Average 



1 9.07 















In Table XXXVII are recorded data from 12 imagos that emerged 

 from the brood chamber June 24 and made the fourth molt upon the 

 forty-fifth day. They were thus normal in development. They give 

 an average of 2 days spent under the puparium. Eight specimens 

 from this same brood were removed from the orchard 7 days before 

 they emerged as imagos and placed upon glass plates in the laboratory. 

 As a result of this treatment they were delayed in the pupal stage and 

 spent only one day under the puparium, a reduction of one-half in the 

 time due to the changed conditions. 



Table XXXVII. — Emergence of 12 males of the terrapin scale from a brood that made 

 the fourth molt upon the forty-fifth day, Mont Alto, Pa., 1913 



No. 



Date 



of fourth 



molt. 



Imago 

 emerged. 



Time 

 imder pu- 

 parium. 



No. 



Date 



of fourth 



molt. 



Imago 

 emerged. 



Time 

 under pu- 

 parium. 



1 



Aug. 10 

 Aug. 8 

 ...do 



Aug. 11 

 Aug. 9 

 ...do 



Days. 



8 



Aug. 10 

 Aug. 8 

 Aug. 7 

 Aug. 5 

 Aug. 8 



Aug. 11 

 Aug. 10 

 ...do 



Aug. 8 

 Aug. 10 



Days. 

 1 



2 



9 



2 



3 



10 



3 



4 



July 7 



Aug. 8 



do 



Aug. 11 



Aug. 9 



do ... 



11 



3 



5 



12 



2 



6 



Average 





7 



Aug. 5 



...do.... 



2 













A comparison of Tables XXXVI and XXXVII shows that the 

 time spent under the puparium by the imago varies from 4 hours 

 to 4 days and that the average time for normal development is 2 

 days. 



