ELMS AND HACKBERRIES ATTACKED. 



35 



Overcup oak (Quercus lyrata). — Southern Arkansas (A. M. 297); 

 Illinois (F. 26519); Butler County, Mo. (F. 72988); Department of 

 Agriculture grounds, District of Columbia. 



California white oak (Quercus lobata). — California (A. M. 303). 



Western white oak {Quercus garryana). — Grant Pass, Oreg., 

 April 25, 1899 (H.); California (A. M. 302). 



Colorado white oak (Quercus leptopliylla) . — Colorado (A. A. and 

 A. M. 301). 



Post oak (Quercus stellata). — Missouri (A. M. 300); Santee Club, 

 South Carolina; Longb ridge, La. 



White oak (Quercus alba). — White oaks show more evidence of 

 sapsucker attack than any other species of the genus in the vicinity 

 of Washington. In some localities large numbers of the trees are 

 closely punctured and girdled. Sapsucker work is very common on 

 this species about Afton, Va., and the tree is attacked also in West 

 Virginia (H.) and near Winston-Salem, N. C. 



English oak (Quercus robur). — Specimens of the horticultural 

 variety of this species known as Quercus sessilifiora cochleata, the sub- 

 species pedunculata, and its cultivated form incisa, five trees in all, 

 on the grounds of the Department of Agriculture, bear rather 

 abundant puncturing. 



European oak (Quercus conferta and var. pannonica). — Depart- 

 ment of Agriculture grounds, District of Columbia. 



the elms and hackberries (ulmaceje). 



This family comprises 17 native trees belonging to 4 genera. 

 Eight of the native species and 2 introduced forms are known to be 

 attacked by sapsuckers. Disfiguring swollen girdles have been 

 noted on 2 species of elm and 1 of hackberry, and 1 of the elms is 

 said to be reduced in vigor by excessive pecking. 



Genus. 



Number 

 of native 

 species. 



Native 



species 



attacked. 



Introduced 



species 

 attacked. 





6 

 1 

 9 



5 



2 

 



2 



























17 



8 



2 



LIST OP ULMACE7B ATTACKED. 



Cedar elm (Ulmus crassifolia). — Matteson, Miss. (F.). 

 Rock elm (Ulmus thomasi). — Lansing, Mich. (A. M. 280). 

 Winged elm (Ulmus alata).— Aiken, S. C. (A. M. 281). 

 White elm (Ulmus americana). — Bendire remarks that the sap- 

 sucker "is partial to the . . . elm;" and Horsford says: "I have 



