GO THE CANADIAN ENTOMOLOGIST. 



ing in the stem, especially in the upper portion thereof. I found the 

 larv* difficult to rear in confinement, and only succeeded in securing one 

 adult from plants removed to the insectary June 14. Correctly suppos- 

 ing that I was dealing with the same species as had Miss Murtfeldt, and 

 overlooking her note in Bulletin 30, I presented the matter in my "Notes 

 of the year in Ohio," at the last meeting of the Association of Economic 

 Entomologists, under the name C. napi, Gyll., coupled with the statement 

 that it was not in Henshaw's Usts, and in this condition my paper was 

 placed in the hands of the Secretary for pubHcation. My single speci- 

 men, reared from affected plants, did not exactly correspond with my 

 specimens of rapce, and remembering the double determination by Dr. 

 Riley for Miss Murtfeldt, and also not at the time having access to the 

 latter's note in Bulletin 30, was led to a conclusion that was, perhaps, not 

 justified, and under different circumstances would not have been arrived 

 at by myself I had no description oi fiapi and a very poor one of i-apoi, 

 but the work of my larvaj corresponded so exactly with that ascribed to 

 the former species, in Europe, as given in Bargagla's Rassegna Biologica 

 di Rincofori Europei, that I was still further misled. 



Before my note went to press, however, I was informed that the old 

 determination of C. napi had been found incorrect, that the species was 

 C. rapce, as was probably true of mine. I submitted my single speci- 

 men to Mr. Howard, the present U. S. Entomologist, with the request 

 that, if it turned out to be C. rapce, my note should be changed in the 

 proof to correspond thereto. This was all very kindly done, so far as the 

 specific name was concerned (See Bulletin No. 2, New Series, U. S. 

 Department of Agriculture, Division of Entomology, p. 90), but, unfor- 

 tunately, the statement that " the species is not yet included in Mr. 

 Henshaw's lists of North America Coleoptera," and which was not 

 intended to apply to C. rapce at all, but to C. fiapi, was, through an 

 oversight, allowed to stand, thus placing me in a position that demands 

 an explanation, and which is, here and for this reason, given. C. napi is 

 not yet known to occur in America. 



In the accompanying plate illustrating the development of Ceuto- 

 rhytichus rapce, the adult is shown, dorsal view at A, lateral view at B, 

 the larva C, excavation in affected plant in v/hich one or more larvae may 

 develop at D. The drawings were made by Miss Detmers, under my 

 supervision, and developed at the Department of Agriculture, the electro- 

 type being kindly furnished me by Mr. L- O, Howard- 



