40 



in length. In figure 11, a, a stalk is opened, showing a larval burrow. 

 At the point where the castings are forced out, which may be the same 

 place where the egg was first deposited, the plant fibers become so 

 stretched that the scar gives to the plant the appearance of being par- 

 tially split open at this point. Such a stalk is shown in the figure at h. 

 Our correspondent writes that the work of the curculio was more 

 apparent in earty seed beds. In 1898 the insects were very scarce, 

 and he stated that his plants did not suffer from the rot. He con- 



a 



h 



Fig. 11.— Work of Ceutorhynchus rapse in young cabbage: a, stalk opened to show larval burrow; 

 b, scar left after escape of larva from stalk — natural size (original) . 



siders this curculio to be the main source of inoculation of the cabbage 

 rot, the beetles going from sick to well plants in the seed beds. 



EARLY OBSERVATIONS; REMARKS. 



In the collection of the National Museum are series of specimens 

 labeled: "From Allis, Adrian, Mich., seed cabbage, April;" " St. 

 Louis, Mo. , horseradish, April 20 " (identified by LeConte as O. rapce, 

 January, 1876); "From A. J. Cook, Lansing, Mich., on cabbage." 



