167 



In carefully examining these moths, it could be seen that there 

 was quite a little difference between the lightest and the darkest 

 colored of each sex, and a close series in between. The males 

 normally are lighter colored than the females. 



From this lot of moths, pairs were selected for breeding. In 

 each case, copulation took place and eggs were produced in one to 

 five days. These hatched, and the moths were reared in the 

 usual period of time. 



Lot A. — A light-colored male and female. Only a few moths 

 matured. There was nothing particularly striking about them, 

 being about the average coloration. An attempt to breed a second 

 generation was not successful. 



Lot B. — This pair was a dark-colored female, and a light- 

 colored male. 25 adult moths were reared. They were about 

 normal as regards variation in color — both light forms and dark 

 forms. From these a dark female and a normal male were 

 selected for breeding. 36 males and 25 females were reared. 

 The males were about normal color, but several were darker; the 

 females were predominatingly of the darker form. 



Lot C. — A pair of dark moths. From these, 22 adult moths 

 were reared. Both sexes were predominatingly darker than the 

 average normal, A pair of the darkest were mated, but with 

 little success, only two females of their progeny were reared. 

 These were very dark. 



Lot D. — This was a very light-colored pair. From them 15 

 moths were reared. These moths were very light-colored com- 

 pared with the average normal coloration. A pair were mated 

 for further breeding. Only 2 adults were reared, and they were 

 very light. 



These experiments were necessarily interrupted, so that no 

 more than two generations were reared; but the results from 

 these indicate that after several generations of selected pairs of 

 extreme coloration, one would arrive at widely different strains 

 or varieties. 



Some Coccidae From Singrapore Collected by F. Muir. 



BY JACOB KOTINSKY. 



By courtesy of the Entomological Division of the H. S. P. A. 

 I was privileged to examine the Coccidae sent by Mr. Muir from 



