140 TURNIP. 



22nd of June, sent me from Boughton Grange, Northampton, by Mr. 

 Wm. Jermyns Brooks, with the following observation : — " I enclose 

 you some leaves of Kohl Kabi with small caterpillars on, which are 

 injuring the crop a good deal." 



On the 28th of June, specimens of Rape leaves so much eaten as to 

 show that the attack was thoroughly commenced in this locality, also 

 were sent me by Mr. James B. Harding, from Wolf Hall Farm, Marl- 

 borough, Wilts, Mr. Harding wrote : — " I am instructed by Lord F. 

 Bruce to forward you specimens of insects found eating Rape on his 

 farm." ..." The moth I found on the leaves with them, and 

 thought it better to send it, as I found two or three more. 



" The insects attack the plant on the under side of the leaves, and 

 leave them like the two enclosed ; the field, where attacked, presents 

 quite a white appearance." — (J. B. H.) 



The specimens of leaves sent were so eaten away that they were in 

 the condition like lace-work, often noticed in severe amount of this 

 attack, and it will be observed that in coincidence with the caterpillar 

 attack being so fully established, that there were now only stragglers 

 noticeably remaining of the moths. 



The following observations, with which I was favoured by Mr. J. 

 P. Stuart, of Orbliston, Fochabers, Co. Moray, N.B., respectively on 

 the 10th of June and the 20th of July, as taken in connection with the 

 note of moth appearance at Fochabers (see p. 139), put in our hands a 

 valuable record of observation in this northerly part of Scotland of the 

 duration of the moth presence ; the date of their complete disappear- 

 ance, and then the date of (what was only too surely to be expected) 

 the appearance of the caterpillars from the eggs which had been laid 

 by the moths before they perished. 



The following letter was sent me on the 10th of June : — '• Since 

 writing you a few days ago, I have been observing the progress of the 

 Diamond-backs ; but strange to say they seem to have almost disap- 

 peared for the present. I yesterday, when examining my Swedes, 

 could only find a few moths where they were in large numbers only a 

 few days before. The conditions of the weather were great heat and 

 scorching sun, and no wind. I commenced to top-dress to-day, to 

 prevent a return of the pest." 



The next report with which I was favoured by Mr. Stuart was on 

 the 20th of July, when he mentioned first appearance of the Diamond- 

 back caterpillars having been observed early in the preceding week, or 

 probably " in the first week of July," amongst his Swedes, which thus 

 gives the date of attack just at the time of first reports of it in the 

 preceding year (1891), namely, the beginning of July, and the 17th of 

 the same month. Mr. Stuart wrote as follows : — 



*• In continuation of our correspondence of last month on the sub* 



