372 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 1 



The eggs were found laid singly in the fruit, though where very 

 smal] apples contained several the distance between them was often 

 very small. Sometimes two or three would be found arranged in a 

 row, not more than one millimeter apart, but each egg occupying a 

 separate and distinct incision. The usual rule was that of single and 

 scattering egg punctures. The eggs were placed on end or at right 

 angles with the surface of the apples, snugly fitting into the incisions 

 made for them. These incisions when made in the sides of the ovaries 

 of blossoms which had but recently shed their petals were of depth 

 sufficient to pierce the carpel walls. In one instance an egg was found 

 in an incision made within the stem of the miniature apple. Out of 

 thirty-six egg incisions counted, fifteen were in the third nearest the 

 tip or calyx end, thirteen were in the middle third, and eight were 

 made in the third nearest the stem. The eggs are deposited in the 

 apple usually with the outer end just beneath the surface of the skin. 

 Quite often the growth of the tissue of the apple forces the eggs out- 

 ward lengthwise and they may often be seen with their whitish trun- 

 cate tube-like ends extruded into view as much as one third or one 

 half the length of the eggs. It is not altogether unlikely that this 

 may be in some cases due to shallow egg laying by the female. When 

 not extruded in this manner they are difficult to discern, as the heavy 

 pubescence over the minute apples conceals them. Freshly laid eggs 

 are more difficult to discern since the tissue surrounding has not be- 

 come discolored. 



Eggs are laid sometimes before the petals fall from the blossom and 

 probably some are deposited while still in the bud. No freshly laid 

 eggs were found in any case after the apples were more than one 

 third of an inch in diameter, and usually not later than the time of 

 the closing of the calyx. The past spring the early blooming varieties 

 suffered more heavily than those opening later. Though eggs were 

 hatching from Blue Pearmain on April 18 the eggs laid in late bloom- 

 ing Ingram were found hatching in the orchard May 1. The adults 

 became more scarce upon fruit trees after the dropping of the petals, 

 although some were seen resting upon the fruit of peaches, when they 

 measured over an inch in diameter. Although the insect is reported 

 as one with two or three generations in Missouri, no egg laying was 

 observed in the apples at any time through the summer. 



To determine the effect of the egg-laying upon the development of 

 the fruit a close watch was kept of marked apples known to have had 

 the egg puncture of this insect made upon them. It seemed apparent 

 that the injury probably caused the dropping of some of the small 

 apples soon after setting. By far the larger percentage of affected 



