IV 



dusting air slaked lime on the plants. The White Grub, larva of 

 Lachnosterna, sp., has ravaged lawns to a marked extent, its injuries 

 being particularly noticeable in cemeteries and like situations, 

 where large tracts of grass make it a difficult pest to conquer. The 

 robins are amongst our best friends in waging war on this pest, 

 since they find and eat many of them daily. A few years ago we 

 found we could eradicate this grub by the use of bisulphide of 

 carbon, and we made an effort this year to find some other remedy 

 which was perhaps more practical for large affected areas. In the 

 course of our experiments we discovered that the grub could stand 

 immersion in a very strong tobacco solution for several hours 





Fig. 1. Cockscomb Gall on White Elm. 



without serious results, apparently. Hellebore was used in various 

 ways without success. We have in mind two preventive measures 

 which we shall test next season if opportunity offers. 



Briichophagus (Eurytoma) funehris, was reared in considerable 

 numbers from fcrimson clover. Varieties of thistles, amongst them 

 the Canada thistle, were noticeably preyed upon by dark colored 

 caterpillars, the larvae of Vanessa cardui, that most cosmopolitan 

 of all butterflies, found everywhere, except in South America and 

 the Arctic regions, and many of these were killed thereby. While 

 abundant, these caterpillars were not sufficiently numerous, of 



