REPORT OF THE STATE ENTOMOLOGIST I907 125 
Alnus alnobetula (mountain alder) 
22 Erineum alnigenum Link no. 18 “ frequens in foliis 
-Alni undulatae ” (= viridis or alnobetula) 
Schweinitz ’34, no. 2800 IPB, 
Placed under section Phyllerium, with simple trichomes. 
Alnus glutinosa ? (European alder) 
23 Eriophyes brevitarsus Fockeu, making an erineum 
on species of Alnus, has been recorded from North America by 
Nalepa, Das Tierreich, Lief. 4, page 8 (1898) ; see Banks ’07. As 
that paper is not accessible to me I am unaware whether it was 
found on the introduced or a native alder, and am indebted to 
Professor Banks for the reference. 
Connold 1901 [| Brit. Veg. Galls, p.130, pl. 49], describes the Euro- 
pean gall. on A. glutinosa, as a blisterlike swelling on the 
upper surface of the leaf often involving the veins and midrib, 
smooth and glossy above, beneath slightly pubescent. He indicates 
in the synonymy Erineum alneum Persoon and Phyl- 
lerium alnigenum Kunze; these appear from the descrip- 
tions to be quite different from each other [see the preceding]. E. 
Pune tiie eersoon 224 Now 20) 15) described (irom A. g@luti- 
nosa) as a Grumaria, thus having the trichomes capitate, which 
distinguishes it from the following forms. 
Alnus incana (speckled alder) 
*24 A white frostlike erineum on under side of leaf, in the 
axils of the veins. Trichomes dense, pellucid. 
Jarvis ’07, p.63, first sp. Ont. 
Specimens are in the State Herbarium from Fort Edward [see 
Peck 1869, 22d Rep’t, p.1ol, Erineum alnigerum], Catskill 
mountains and Albia (Professor Peck) labeled Erineum 
alnigerum Kunze, “differs from E. alneum Pers.” and 
“near E. tortuosa but hypophyllous and colored.” These 
Specimens are orange to rusty brown (dried) and in some the gall 
covers nearly the entire under surface. No We 
Very probably identical with our no. 22, E. alnigenum. 
Hote alenietimersee) the preceding, Lhe description ef i. 
tortuosum is not accessible to me; very likely it is the fol- 
lowing. 
