﻿FIELD AND FOREST. 201 



the vine in cultivation. One thing seems very certain, that in order 

 to render the sulpho-carbonates practically efficacious in killing the 

 insect, it is necessary to use water as the vehicle by which they 

 maybe brought to all the underground parts of the plant, and that 

 the best time of the year for their application is the winter or early 

 spring, when the earth is still moist and the quantity of water neces- 

 sary to be brought on to the ground by artificial means is consequently 

 less. Mixed with lime in the proportion of two to one, these sulpho- 

 carbonates give a powder which can be spread over the ground before 

 the heavy rains, that is, between October and March, and which will 

 probably prove itself very efficacious. 



The conclusion at which M. Mouillefert arrives at the end of his 

 report is that the efficacy of the sulpho-carbonates is proved, and all 

 that is necessary is to bring to perfection their employment in agricul- 

 ture, whieh can only be accomplished by the intelligence and practi- 

 cal knowledge of the vine grower who is well able to discover the 

 economic processes of culture which are conducive to their successful 

 application. 



He ends by saying that " Science has accomplished its mission, and 

 it remains for Agriculture to fulfil its part" in the eradication of the 

 Phylloxera from the vineyards of France. — Nature. 



FIELD RECORD. 



Hints on Hunting Catocala. — My experience in this locality — 

 N. W. Philadelphia — has been that Catocala serena, Edwards, C. 

 obscura, Strecker, C. ftebilis. Grote, C. reteclta Grote, secrete them- 

 selves far better than any in the group'except C. antinympha , and I 

 do not doubt that the cause of these being marked rare in some local- 

 ities is simply that they are not hunted for properly. When hunting 

 for these I always arm myself with a stout switch or young sapling 

 and then look for trees with very loose bark. After giving the tree an 

 outward inspection and taking off anything I may see, I give it a 

 beating, not a few light taps, but a good thrashing commencing at the 

 bottom and working up and around; nearly always I start some of the 

 above from under the bark. The shellbark Hickory tree, ( Carya alba) 

 is an exellent example, and on this tree I take C. serena, and on no 

 other unless it has been disturbed, generally it will alight on the same 



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