293 



EXPLANATION OF PLATE. 



Lachnus platanicola Riley. 



Fig 1. Male. Enlarged. 



la. Head and autenua of male. Greatly enlarged. 



2. Apterous viviparous female. Enlarged. 



2a. Head and auteuna of same. Greatly enlarged. 



3. Winged viviparous female. Enlarged. 



3a. Head and auteuna of same. Greatly enlarged. 



4. Eggs on Sycamore twig, and oviparous females engaged in oviposition. Nat- 

 ural size. 



Columbus, Ohio, November, 1890. 



EXTRACTS FROM CORRESPONDENCE 

 The Clover-Seed Midge in England, the use of Paris green, and other notes 



I think it may be of some interest to you to mention that after 2 years or more of 

 watching I have been able to report your "American Clover-Seed Midge," Cecidomyia 

 leguminicola Liatner, as present here detrimentally in clover heads. I have now seen it 

 in its normal larval locality doing plenty of mischief, also at (or rather by) clover roots 

 in the earth in winter, and from this hibernating presence of larva reared the imago 

 myself. I do not like, in a case of such minute identification, to rest solely on my 

 own opinion, so I submitted it to Mr. Meade, who examined it very thoroughly and 

 confirmed my view. I have endeavored to find trifoUi. As yet, however, although 

 there is another Cecidomyidous larva present with that of leguminicola at clover roots, 

 I have no evidence of trifolii being present. I can not find the leaf galls and I do not 

 know that trifolii leave them, but I want very much to make out what the second 

 kindof Cecidomyiidous larvte are. They have a somewhat pointed breastbone or an- 

 chor process, whereas that of leguminicola is bifid. 



Amongst new observations of plant attack is serious mischief in one place by 

 infestation of Stem Eel worm (2'///e«c/K(.s devastatrix) m 1Se\([-h^a\\ plants. This was 

 in bean plants after oats, and a sample of the plants sent me (of which the normal 

 height should apparently, from specimen sent, have been 3 to 4 feet) were stunted 

 down to from about 4 to 10 or 12 iuches, and many of the pods also greatly stunted 

 and deformed in growth, but not all, and the laden shoots thickly placed together 

 on the central shortened stem had a curious appearance. 



Our orchard work with Paris green proved a great success where the directions 

 were properly carried out. Of course we had immense opposition to fight agaiust, 

 but at the Toddington fruit grounds the work resulted in a glorious crop of plums, 

 and in one of the last letters of Captain Corbett ( whose decease we all greatly regret) 

 he mentioned that now he thought we could keep the caterpillars in check, and he 

 was truly grateful. Now we are finding the benefit which I hoped for but did not 

 venture to say much on prospectively. We are having reports of a very much lessened 

 amount of presence of wingless moths where treatment was applied. From Todding- 

 ton, where 3 years ago as many as five hundred moths were caught on one tree trunk 

 by our sticky bands, I have been informed that up to date of observation nine was 

 now the largest number. This satisfactory result is confirmed from elsewhere, as 

 partly, or sometimes, the effect of both banding and Paris green spraying, but some. 

 times quite demonstrably the effect of the spraying. I hope to give details of this 

 in my next annual report.— [Eleanor A. Ormerod, Torrington House, St. Albans, Eng- 

 land, November 24, 1890. 



