104 ENTOMOLOGICAL SOCIETY 



\Vaite suggested that there was still, however, a chance for 

 doubt as to the actual stimulating effect of the Bordeaux mixture 

 for the reason that there might be fungi on the plants which had 

 been overlooked, and which this treatment counteracted, resulting 

 in a more vigorous growth of the plant. Mr. Swingle, referring 

 to the use of the same (Bordeaux) mixture, stated that the matter 

 had been studied by a German investigator who had come to the 

 conclusion that the substance had a stimulating effect on the 

 chlorophyll of the plant, not by actually penetrating the leaves, 

 but simply by what was known as chemio-tactic action. The 

 subject was being further studied, and the action of the Bordeaux 

 mixture would undoubtedly soon be satisfactorily explained. 



The following paper by Mr. A. D. Hopkins was read by 

 the Secretary : 



NOTES ON THE DISCOVERY OF A NEW SCOLYTID, WITH 

 BRIEF DESCRIPTION OF THE SPECIES. 



By A. D. HOPKINS. 



On my way home from the October meeting of the Society I 

 btopped in Raleigh county, West Va., on Oct. 6, for the purpose 

 of making some observations in the white pine and chestnut for 

 ests of that region. On the following day I discovered the gal 

 leries of a Scolytid in the otherwise uninjured sap-wood of living 

 white oak trees. The frequent occurrence of these injuries, and 

 the finding of a Scolytid new to me in the galleries, led to an 

 investigation of the trouble, which has resulted in the develop 

 ment of some very interesting facts regarding the species, its 

 habits, and the injuries resulting from its attack. 



My first impression was that the Scolytid was Corthylus 

 punctatissimus, but upon my return to the station, and com 

 paring it with examples of this species, I found that it possessed 

 differences which I believed to be sufficient to distinguish it as 

 another species. It cannot be C. spinifer, described by 

 Schwarz, on account of the absence of the spine on the antenna 

 of the male, and, as it appears to differ from the South American 

 species mentioned by Eichhoff in his " Descriptio Tomicinorum, 

 1879," I have decided that it is a new species, which I have 

 named and will here briefly describe as follows : 



Corthylus columbianus n. sp. Structure and general appearance of 

 male and female, same as punctatissimus. Differs from this species, how- 



