REPORT OF THE STATE ENTOMOLOGIST 1907 120 
4rt A pocket (?) gall, chiefly on the upper side of the leaf, often 
confluent. 
Walsh ’64, p.608, and ’67, p.256 lie 
(Hagen °85, p.29) 
Betula papyrifera (paper birch) 
42 A yellowish white to brownish erineum forming large patches 
between the ribs on the under side of the leaf. Trichomes capitate, 
rather long. 
Garman ’92, no. 14 NEE 
Jarvis 07, p.62, fifth sp. Ont. 
*43 A nodular pocket-gall, occurring upon both faces of the leaf; 
yellowish or reddish to purplish; those on the under surface finely 
pubescent. With preceding. 
Garman ’92, no. 15 NEL 
Jarvis ‘07, p.60, fourth sp. Ont. 
Specimens from North mountain, near the Catskill Mountain 
House. N.Y. 
Betula populifolia (American white birch) 
*44 A bright rusty erineum lining dimples on the under side of 
the leaf; dark brown or brick-red when dry. Trichomes capitate. 
Rees seo, prot CHrineum atreum Pers.) IN We 
German ’92, no. 16, fig. 4 N.H. 
Professor Peck’s specimens from Fort Edward, as above, are 
in the State Herbarium, also others from Nassau (Peck) labeled 
IB, Wetton INED.S Ges Che wo, oy 195 el MlirS weal Acs 
described from Populus nigra and P. fastigiata, (Per- 
soon ’22: no. 23), and appears quite another thing. 
Betula pumila (low birch) 
45 A transparently white, granular erineum on the surface of 
the leaves. 
Jarvis 07, p.63, fourth sp. Ont. 
Betula sp. 
ZOMM sie tiMce My dorp mei lam eleinks no, 11, in foliis 
betulinis Horti.” 
Schweinitz ’34, no. 2798 Pas 
Placed under section Phyllerium with simple trichomes, which 
distinguishes it from any of the preceding forms on birch. Appar- 
ently not in Persoon. 
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