41 



scales are sometimes of a slate color, which under certain lights ren- 

 ders the spot inconspicuous. There is a great difference between 

 the genital organs of the two sexes, as the ovipositor of the female can 

 be said to be hoof-sliaped, and ends, roughly speaking, in a point; 

 while the presence of the claspers on the male can be said to cause the 

 abdomen to end in a line. 



HABITS OF THE MOTH. 



It is generall}' stated by writers that the adults of the codling moth 

 are but rarel}' seen in orchards. In cases where the infestation is not 

 very bad this is usually the case; but where the infestation is bad it 

 is a very common thing to see the moths in the orchard, but never in 

 any large luimbers. They spend most of their time resting on the upper 

 surface of the leaves or on the trunks of the trees, where they are 

 hidden by their resemblance to the grayish bark. When disturbed, 

 they fly away so ([uickly that the eye is unable to follow them in their 

 erratic flight. According to many observers the codling moth feeds 

 on the juice of ripe apples. The writer has often observed them drink- 

 ing water in cages. 



As the conclusion of many investigations by many persons and under 

 various conditions, it has been definitely deterniined that the insect is 

 not attracted to lights. A very few records of captures of codling 

 moths at lights, usuall}^ of the accidental catching of one or two 

 specimens, have been published. 



DURATION OF THE LIFE OF THE MOTH. 



LeBaron gives 1 week as the average length of the life of the adult 

 codling moth, \Vash])urn gives from 10 to 15 days, and Slingerland 

 says that one moth lived in his cages for 17 days. Records of the 

 writer in August, 1902, of forty-seven moths, show that two moths 

 lived 1 da}^; ten, 2 days; eleven, 3 daj^s; ten, 1 days; two, 5 da3^s; seven, 

 6 days; one, 7 days; two, S dajH, and two, 9 da3^s; giving a weighted 

 average of 1 days. 



The length of the adult stage depends upon the conditions under 

 which the moths are kept, as they will live longer if there is water 

 which they can drink. The average of 1 days was obtained when 

 there was no water accessible to the moths; but had there been water 

 or ripe fruit, the average would probably have been longer. 



GENERATIONS OF THE INSECT. 



The question of the number of generations of the codling moth in 

 one season has for many years been in doubt. In recent years ento- 

 mologists have jjeen stimulated to greater efforts and have in ji measure 

 solved the prol)lem. The economic importance of this question is 

 very apparent, as the second generation of the insect inflicts about ten 



