374 Bulletin 265. 



Among crab apples, the following varieties have been found infested: 

 Pyrus sibirica var. striata, the Striped Crab; Pyrtts floribunda, Flowering 

 Crab; Pyrus prunifoUa, the Quaker Beauty, and Pyrus loensis, the 

 Prairie Crab. The Lady Apple is badly infested. The Eastern native 

 wild apple, Pyrus coronaria, growing in a pasture field near Ithaca was 

 found to contain the insect. It also occurs in a number of kinds of 

 natural fruit growing along the roads and in abandoned orchards. Appar- 

 ently the same larvae were also found in the seeds of Sorbus latifolia at 

 Rochester, N. Y., but the adults from these have not been reared. 



Distribution. — The insect seems to be generally distributed in New 

 York. It has been collected in the following places: Weedsport, 

 Penn Yan, Monterey, Hornby, Rochester, Cranberry Creek, Kingston 

 and Geneva. From about half a bushel of various kinds of cider apples 



^ 



Fig. 75. — Three sizes of apples infested ^^^f^ t»» 



by the Apple-seed Chalcis. All ^^r ^* 



redticed oite-half 



Fig. 76. — Knotty crab apples, caused by the 



egg-laying punctures of the 



Apple-seed Chalcis 



sent us by Dix J. Camp, Randolph Center, Vt., we were able to find 

 only two or three infested seeds. 



Injury to tJie fruit and seeds. — Mokshetsky reports that in Crimea the 

 presence of the larva causes the fruit to drop prematurely. This does 

 not seem to be the case in this country. In some varieties, however, 

 considerable injury is caused by th^ punctures made by the female 

 in laying her eggs. These appear, in the mature fruit, as minute 

 black dots occupying more or less distinct depressions and give the 

 apple a decidedly knotty form (Fig. 76). From each one of these punc- 

 tures a brownish line of hardened tissue extends to the core, resembling 

 the effects of the puncture made by certain sucking bugs. This effect 

 is shown in the ripe crab apple in the figure on front cover. In the 



