240 THE CANADIAN ENTO^MOLOCUST, 



being able to find it recorded from N. J., or farther to the north, I should 

 like to hear if its occurrence north of Pa. is known; I may add that Mr. 

 Robinson gave to the collection a very small specimen of Straiegus 

 antaeus collected by him in Nantucket, Mass., Aug. 24, 1884. 



Dr. H. a. Hagen, Cambridge, Mass. 



Deal- Sir : In reference to your article in the August number, allow 

 me to add as injured by Pulvi7iaria innumerabilis, the following : No. i , 

 Acer saccharinum ; 2, A. rtibrum ; 3, Negitndo aceroides ; 4, Ulmus 

 fulva ; 5, U. a?nerica?ia, 6, Celtis occidentalis ; 7, Morus rubra; 8, 

 Fraxinus sambticifolia ; 9, Populus bahaviifera ; 10, Juglans cinerea ; 

 XI, J. nigra; 12, Ji/ms toxicodendron. Tiiia a^nericana I have not seen 

 affected here ; our cultivated grape ( Vitis) very seldom, and sparsely, if 

 at all, while our wild grape seems perfectly free from the pest. This 

 insect, better known here as the Maple-slug, has been found by me on all 

 the above, never taking note unless I found it at least six times on the 

 same kind of trees, growing far apart and in quantities as 'follows : On 

 No, I, sparsely; 2, soft maple, very full; 3, ash-leaved maple, better 

 known as box-elder, very full, equal to No. 2 ; 4, 5 and 6 less affected but 

 alike; 7, 8 and 9 sparsely; 10 and 11 least affected, while 12 (being our 

 poison ivy) only when the tree to which this parasitic plant was attached 

 was affected. I had made my observations in Peoria, Tazwell and Liv- 

 ingston Counties, and have noticed in the City of Peoria especially the 

 stone pavements sprinkled with the so-called honey dew in patches here 

 and there, so thick that any passer-by would look up wonderingly unless 

 familiar with the cause. As such articles are of interest to farmers and 

 to growers of shade trees, they will be glad to get such information as 

 experience can give them through some observation. The last visit of this 

 insect in great numbers was about five or six years ago. The question here 

 has frequently been asked with some anxiety : How will they appear next 

 season, etc. ? Their natural enemies and wet weather, especially when the 

 rains come frequently during hatching, as well as other causes, are among 

 the agencies which limit their increase. 



A. H. MuNDT, Fairbury, Ills. 



August No. Mailed Nov. 17, ig 



Sept. 11 11 Dec. i, 



Oct. n II II 17, 



Nov. •■ " " 24, I 



