104 



Prelimixary Li.<t of (TALL-pRuDrcrxa Insects Common to 



Indiana. 



Mel T. Cook. 



For the past two years the writei' has been very much interested in 

 gall-produoiug insects and in tlie structures produced by them. Amonsj: 

 other very interesting phases of this problem is tlie question of distriliu- 

 tion. We knoAV very little of the distribution throughout the country and 

 nothing of the distribution In Indiana. 



My coll^'Ction of galls includes over 200 species, collected in the states 

 of Illinois, Indiana and Ohio. Those collected in Indiana are all from 

 Putnam County and about seventy species are included. Of this number, 

 I have accurately determined forty species. These forty species represent 

 five orders (including Acarina) and eighteen genera. The host plants 

 represent ten orders, twelve families and fourteen genera. 



The order and families of the host plants are the following: 



Orders. Fain'dies. 



Salicales, Salicaceae. 



Juglaudales, Juglandaceae. 



Tagales, Fagaceae. 



Urticales, Ulmaceae. 



I Hamamelidaceae. 



Resales, ■[ Rosaceae. 



1 Caesalpinaceae. 



Sapiudales, Aceraceae. 



Rham^nales, Vitaceae. 



Malvales, Tiliaceae. 



Gentianales, Oleaceae. 



Campanulales, Compositeae. 



The ft)llowing is a list of the insects and host plants Icnown positively 

 to occur in Indiana: 



HEMIPTERA. 



1. Hormapliis hamamelis, Fitch — Hamamelis Virgiuiaua L. 



2. Colopha ulmicola, Fitch — Ulnius Americana L. 



3. Pemphigus ulmi-fusus, "Walsh — Ulmus Americana L. 



4. Schizoueura Americana, Riley — Ulmus Americana L. 



