(C) 



LIST OF PUBLICATIONS OF THE ENTOMOLOGIST. 



The following is a list of the principal publications of the 

 Entomologist during the years 1893 and 1894 (lUO), giving title, 

 place, and date, and a summary of contents of each. 



How to Prevent the Ravages of the Cabbage-Maggot. (Garden- 

 ing, for February 1, 1893, i, p. 155, figs. 1-3 — 92 cm.) 



As the effectiveness of remedies are often influenced by soil and other con- 

 ditions, the following are noticed and commended: Tobacco; lime; burdock 

 decoction; tansy decoction; kerosene emulsion; night-soil; soot; hellebore; 

 liquid manure. More effective than any of these as a preventive — the 

 tarred-paper protectors designed by Prof. E. S. Goff are described and illus- 

 trated, vrith method of making, and mention of results obtained from their 

 use. 



A Destructive Elm-Tree Bark-Borer. (Garden and Forest, for 

 February 15, 1893, vi, p. 76 — 29 cm.) 



The w^hite elm, Ulmus Americana, in New York and other Northern 

 States is being injured and killed by the burrowing in the inner bark and 

 sap-wood of the longicorn beetle, Saperda tridentata Oliv. A coating, con- 

 taining carbolic acid and Paris green to deter from oviposition and to kill the 

 larvas in entering the bark, is recommended. A better remedy would be to 

 remove the outer bark until the burrows are reached, and then apply kero- 

 sene emulsion to kill the grubs or pupee. The experiment of M. Robert, in 

 France, is related, of killing the Scolytus in elms by removing all of the outer 

 bark in two thousand elms, and in removing strips of the bark two inches 

 wide from the ground to the boughs. The four insects operating on our elms 

 and threatening their destruction are noticed. Fears expressed lest the elm 

 is a doomed tree. 



Plant-Lice. (Country Gentleman, for March 9, 1893, Iviii, p. 186, 

 c. 3 — 12 cm.) 



Inquiry is made, from Nas«au, N. Y., of means for destroying lice on roots 

 of vegetables in gardens. But few species of plant-lice are known to operate 

 in the above manner. Only five are recalled (named with their food-plants). 

 Several of the flowering plants are subject to root attack. For remedies 

 tobacco water is thought the best; others that may be experimented with are 

 hot water, kerosene emulsion, common soapsuds, whale-oil soapsuds, pyre- 

 thrum water, hellebore tea, alum water, and lime water. Lime or wood ashes 

 washed into the soil may serve as preventives. 



