MISCELLANEOUS GARDEN INSECTS 415 



'hibernated beetles in the spring from April to June or by newly 

 transformed individuals in late summer or autumn. 



The life history has not been studied, but is probably very 

 similar to that of Lachnosterna (page 79) . 



Control. No very satisfactory means of control have been 

 tried in a practical way. It is stated that lime scattered over 

 infested fields has driven the beetles away. It is evident that 

 after the crop is gathered, infested fields should be pastured with 

 hogs, if possible, or plowed deeply, and plowed again in the spring. 

 Evidently further study of the habits of the pest is necessary before 

 satisfactory means of control may be devised. 



The Carrot Rust-fly * 



The Carrot Rust-fly is a European species, being a serious 

 pest of carrots in England and Germany, which has been known 

 in Canada since 1885 and appeared in New York in 1901 and since 

 then in New Hampshire. The larva or maggot which does the 

 injury very much resembles the cheese maggot or skipper in .gen- 

 eral appearance, is a rather dark brown, and a little less than one- 

 third inch long. The parent fly is about one-sixth inch long 

 with a wing expanse of three-tenths inch, and is a dark blackish- 

 green color, sparsely clothed with yellow hairs, and with pale 

 yellow head and legs, except the eyes, which are black. 



" Attack on carrots is not difficult of recognition. The leaves 

 of the young plants early in the spring turn reddish, and the roots 

 are found to be blotched with rusty patches, particularly toward 

 their tips. The roots when stored for winter, although not always 

 manifesting any degree of injury on the outer surface, may at 

 times be perforated in all directions by dirty brownish burrows, 

 from which the whitish or yellowish larvae may be found some- 

 times projecting." Celery is also attacked, the larvae eating the 

 thick part of the root when it is half grown, stunting the plant so 

 as to make it worthless; for market. The life history of the species 



* Psila rosce Fab. See Chittenden, Bulletin 33, n. s., Division of Ento- 

 mology, U. S. Dept. Agr., p. 26. 



