74 ENTOMOLOGICAL SOCIETY 



feeding race originated in the immense corn fields of Illinois 

 and eastern Iowa did this gradual tidal wave sweep over and 

 reoccupy the eastern country, and it seems doubtful if, but 

 for this change of habit, we should ever have witnessed this 

 phenomenon. At present, the corn fields of northern Kansas 

 and southeastern Nebraska seem to be literally overrun with 

 this insect. During August and September it may be found 

 in myriads on the blossoms of a species of Helianthus that 

 grows abundantly in that section and also on goldenrod, and 

 it does not seem possible that it there has this corn-feeding 

 habit, else it would be impossible for farmers to grow this 

 cereal. 



Mr. Webster said that a good illustration of the partial or 

 entire immunity of forest trees growing naturally in the woods 

 to the attacks of some insects that affect the same species of 

 tree when planted on lawns or along roadsides, is offered by 

 the walnut caterpillar, Datana integerrima G. & R. Year after 

 year this will defoliate walnut trees growing on lawns and 

 along streets and roadsides, but he did not remember of ever 

 having observed an infested tree growing up naturally in the 

 woods. 



The following papers have been presented for publication : 



NEW BICOLORED CIOIDJE. 



[Coleoptera.] 

 (PLATE III.) 



By E. J. KRAUS. 



Among the insects found in lichens and decaying wood and 

 sometimes confused in collections with the true bark and wood- 

 boring Scolytidae are a number of species of Cis and other 

 Cioidse. Certain beautifully colored species occurring in the 

 United States and Cuba have heretofore been undescribed, and 

 at the suggestion of Mr. E. A. Schwarz and Dr. A. D. Hop- 

 kins, the writer has prepared the appended descriptions, based 

 on material in the U. S. National Museum, and that collected 

 at Virginia Beach, Va., by Doctor Hopkins. 



