28 



EXPERIMENTS IN THE BREEDING OF CERIONS. 



The Loggerhead Key Colony M. 



In May 1916 we planted 300 tips taken from Colony F, representing 

 the first generation of Florida-grown Cerion viaregis of the 1914 

 planting. This colony was placed a little south of the entrance stake to 

 Colony E, on the inner edge of the outer sand dune, which is covered 

 by a mixed growth of Uniola paniculata and Sporoholus virginicus with 

 a few bay cedars and small specimens of Tournefortia. The place is 

 marked by a stake and a tag bearing the legend ''Cerions, 1916, M." 



In July 1917 we gathered, measured, and photographed 26 full-grown 

 individuals of this colony (table 11) ; 30 adult and 7 almost adult from 

 Colony F were added to the colony on this date. 



In June 1919 we collected 100 adults and 35 tips of the second genera- 

 tion of Cerion viaregis. The adults were photographed and measured. 

 The photographs are shown on plates 30 and 31, while the measurements 

 are given in table 12. The whole lot was planted as Colony P. 



The Loggerhead Key Colony P. 



This colony, when planted in January 1919, consisted of 100 adult 

 and 35 tips of the second generation Florida-grown Cerion viaregis 

 taken from Colony K. It is about 60 feet northwest of the entrance 

 stake to Colony E on the east side, a little west of the line between the 

 entrance stake and the light-house. The coarse calcareous sandy 

 ground is covered by a scattered growth of Sporoholus virginicus and 

 Uniola paniculata and fringed with bay cedars. The place is marked 

 by a short stake bearing a tag with the legend "Cerions, 1919, P." 



The Loggerhead Ivey Colony Q. 



Colony Q consists of 100 adult and 5 tips of Cerion viaregis from 

 Colony M, second generation Florida-grown individuals. It is on the 

 outer dune on the east side, about 200 feet north of the entrance stake 



