SYSTEMATIC INDEX OF GALL-INSECTS. 



(This index will also serve as list of plants inhabited by the gall- 

 insects ; the figures indicate the page on which the gall is described or 

 mentioned. ) 



GALL-PRODUCING ACARINA. 



The nomenclature of the gall-mites is, as far possible, in accordance 

 with Bank's Catalogue of the Acarina, or mites, of the United States. 

 (Proc. U. S. nat. mns., 1907, v. 32, p. 595-625.) They all belong to 

 the family Eriophyidae, and those mentioned below to the genns Eriophyes. 



Eriophyes 

 abnormis (Tilia americana), 44-45. 

 crnmena ( Acer saccharnm), 42. 

 aenigma (Salix), 10, 08. 



amelanchieri (Amelanchier canadensis), 39, 108. 

 avellanae (Corylns americana), 15. 

 betulae (Betnla lntea), 10, 72. 

 coryli (Corylns americana), 15-16. 

 dentatae (Castanea dentata), 16, 74. 

 ferruginea (Fagus americana), 16. 

 padi (Primus), 40. 

 quadripedes (Acer saccharum), 42. 



querci (Quercus nana, (^. alba, Q. prinus, Q. prinoides), 24, 94. 

 rhois (Rhus radicans), 41, 114. 

 rosea (Acer saccharum), 42. 

 semen ( Salix), 10. 

 serotinae (Primus serotina), 40. 

 spicati (Acer spicatum), 43. 

 ulmi (Ulmus americana), 32, 100. 

 viburni (Viburnum dentatum), 48. 



GALL-PRODVCING IIEMIPTERA. 

 APHIDIDAB. 



Myzus 

 ribis (Ribes rubrum), 34, 100. 



Schizoneura 

 americana (Ulmus americana), 32. 



