TRANSACTIONS HORTICULTURAL SOCIETY OF NORTHERN ILL. 357 



f. Head small, the segment behind it much enlarged ; body more or less 

 flattened ; bore into the trunks of trees, stems and canes of shrubs ; 

 perfect insect a saw-horned or buprestian beetle. (Exs. flat-headed 

 apple-tree borer and raspberry-cane borer.) — Buprestidcc. 

 ff. Head small, segment behind it more or less enlarged, but not usually so 

 much in proportion to rest as previous section ; body not, or but slightly, 

 flattened; generally cylindrical ; incisions distinct; bore into thetrunks, 

 etc.; ])erfect insect a long-horned beetle, with the head vertical. (Ex. 

 the round-headed apple-tree borer, or saperda.) — Lamiides. 



CC. Minute, seldom exceeding one-fourth of an inch in length ; enlarged in the middle 

 and tapering toward each extremity; curved, with numerous transverse 

 wrinkles; perfect insect a beetle. — Scolytidcr curculionida. 



Explanation. — Xylcutcs cox\X^\\-\% the carpenter-moths; jEgerida;, the 

 segerians, a family of moths with the wings more or less transparent, 

 usually with bltie or blue-black borders. Uroceridce are hymenopterous, or 

 wasp-like insects. The other families are beetles, and will be found fully 

 exi)lained in Dr. LeBaron's Fourth Report, which will be found in the 

 Trans. 111. Hort. Soc. for 1874. 



In addition to this arrangement, we might classify by their methods 

 of operating, thus : Those that bore in the roots ; those that bore into the 

 trunk ; twig and cane, or stem-borers, and bark miners. This would 

 afford some advantages, by notifying us what to look for when examining 

 these different parts of our trees and shrubs. But I can not take time now 

 to carry out these thoughts to their ultimate divisions. 



I will now take up some of the most noted of our borers, which, as 

 you see, I have figured on these charts, both in the perfect and prepara- 

 tory states. I have also specimens here, which I hand to you for your 

 inspection, as I talk about them. 



Chrysobothris femorata, Fabr. The Flat-headed Apple-tree Borer. 



(For description, habits and remedies, see pages 190, 191 of this vol- 

 ume. Prof Thomas, in preparing this essay, was not aware that the 

 transactions of this Society would be published with the transactions of 

 the State Society, and hence did not avoid repetitions. He has, however, 

 given instructions to leave out portions, the substance of which is to be 

 found elsewhere in the book. References to pages where omitted portions 

 may be found in this volume are made in all cases of omissions. 



Under the head of remedies, the following was given in addition to 

 what is found on page 191. — Editor.] 



Mr. Austin, of the firm of Austin & Co., Downer's Grove Nursery, 

 informs me that kerosene was tried in their nursery last year, with com- 

 plete success, against this borer, and without injury to the trees. He 

 expects to follow up the experiment, and will report the result hereafter. 



