THE LARGER CANXA LEAF-ROLLER, 



flight of the butterfly in fair Aveather is after sundown. ]Miss Helen 

 King describes its motion as " very rapid." 



AARIETIES OF CANXA :M0ST AFFECTEO. 



The question as to whether (hirk varieties of canna are more 

 affected by this species than are green ones remains for further in- 

 vestigation. In the District of Columbia the green-foliage varieties 

 which have come under the writer's observations are considerably 



more affected than the darker ones. 

 Allien, however, the insect becomes 

 very abundant it attacks all va- 

 rieties. One correspondent, men- 

 tioned on the introductory page, 

 has stated of the occurrence of 

 this species in the Gulf region that 

 it affects more particularly the 

 dark varieties. A leaf showing 

 severe injury bj'^ this sj)ecies of 

 leaf-roller is illustrated in figure 

 7. and a bed of cannas showing- 

 similar injury is shoAvn in figure 8. 



XATIRAI. EXE:M1KS. 



In spite of years of experience 

 w'ith this species, neither Mr. Rus- 

 sell nor the writer has been able 

 to observe any form of disease, 

 but Mr. E. G. Smyth, when work- 

 ing under the writer's direction at 

 Diamond Springs, Va., observed 

 two larvae killed by disease Octo- 

 ber 8, 1900. 



During October, 1907, Mr. Rus- 

 sell found at Orlando, Fla., quite 

 a number of egg parasites. Octo- 

 l)er 12 he found a canna leaf on 

 which were 33 eggs of this species, 5 unhatched, and 2 hatched larvae; 

 26 of these eggs had given out parasites through a very minute hole 

 in the side. October IG, 4 unhatched eggs were placed in one vial 

 and 16 in another vial. November 1, while away, the eggs hatched 

 out 20 iiiinute parasites,^ PentartJiron mhiutum Riley, as identified 

 by Mr. A. A. Girault. In the other vial one larva hatched ; the rest 

 gave forth many minute parasites of the same species and one large 

 imiclentified parasite.- These observations, although few in number, 

 show a high percentage of egg parasitism. 



Fig. 7. — Cnnna loaf, showintr advancod 

 Injury by larv;T> of the larger canna 

 leaf-roller. (Original.) 



iChittn. Xo. 2n0»i. 



ClHttn. Xo. 200"=. 



