14 X. H. AGR. EXPERIMENT STATION. [Bulletin 171 



Ohio Valley and just west of the Lower Mississippi. The fruit, 

 while fragrant, does not ripen until very late, and does not lend 

 itself well to the known habits of the apple maggot, especially 

 the dependence of the larva on the mellowness of the pulp in 

 order that it may mature readily. The probabilities do not 

 appear to lie in the direction of native wild crabs as the original 

 host of the apple maggot in America. 



HAWS. 



Of the native fruits now known to be attacked, the haws, 

 Crataegus spp., seem to offer considerable probability of serving 

 as the original host. 



The maggot was early recorded from Cratcegus. Walsh wrote 

 his original description in part from adults bred from haws col- 

 lected in Illinois about 1860 or 1861. Thus the first recorded 

 food plant was the haw. 



In 1872 Riley (52) spoke of the maggot as indigenous, feeding 

 on wild haws or thorn-apples and on crabs. In the same article 

 he expressed the wish that he might receive pupae from the East 

 in order to have adults ''to place alongside of those in my cabinet 

 which have been reared from wild haws and crabs here." 



Comstockin 1882 (8) published a record of the occurrence of the 

 insect in Cratcegus at Washington, D. C, stating that the haws 

 grew near an orchard but that the latter was not infested. The 

 adults were reared and the identity established. Two years 

 later Cook (9) wrote that the maggots were commonly found in 

 haws in Michigan, Illinois and Wisconsin. Cordlej^, in 1889, 

 stated that haws in Michigan were commonly infested. 



Harvey in his monograph (25) states that he had not found 

 the species in haws in Maine, where extensive studies were con- 

 ducted, nor in Arkansas, where haws grow abundantly, nor in 

 Iowa; but that he had found it abundantly in haws in northern 

 New York. 



Fletcher, in 1897 (16), wrote as follows: "In 1887 I bred the 

 fly from haws found at London, Hamilton, Toronto, Montreal 

 and Ottawa." He stated also that in 1888 haws at the Domin> 

 ion Experimental Farms were badly infested. 



Negative records were given by Quaintance in 1908 (51) who 

 stated that in the preceding three years specimens of Crataegus 



