30G 
General Catalogue of the Homoptera 
Philaenus spumarius populi [nec Linne] Cobelli 1902a: 13 [Listed] 4 
[Ptyelus spumarius] populi [nec Linne] Dominique 1902a: 220 [Listed] 15 
Cercopis populi [nec Linne] Sherborn 1902a: 769 [Catalogued] 
P[tyelus] populi [nec Linne] Graeffe 1903a: 56 (16) To Ptyelus spu¬ 
marius Linne 
[Ptyelus spumarius] populi [nec Linne] Hiieber 1904a: 266 [Key] 16 
[Ptyelus spumarius] populi [nec Linne] Hiieber 1904b: 266 [Key] 16 
P[tyelus] spumarius populi [nec Linne] Melichar 1904a: 36 [Compara¬ 
tive note] 
[Philaenus spumarius] populi [nec Linne] Morley 1905b: 25 [Listed] 17 
[Philaenus spumarius] populi [nec Linne] Oshanin 1906a: 37 [Cata- | 
logued] Equals Cercopis populi Fabr. [nec Linne] 
[Philaenus spumarius] populi [nec Linne] Bierman 1907b: 29 [Listed] 
[Philaenus spumarius] populi [nec Linnel Oshanin 1907b: 222 (10) I 
[Listed] 18 
P[tyelus] spum[arius] populi [nec Linne] Enderlein 1908a: 102, 107, 
189 [Ecology] 9 
[Philaenus spumarius] populi [nec Linne] Saunders and Edwards 
1908a: 11 [Listed] 8 
Philaenus spumarius populi [nec Linne] Cobelli 1909a: 8 [Listed] 4 :9 
[Comparative note] 
[Ptyelus spumarius] populi [nec Linne] Lambertie 1909a: cxv [Listed] 6 | 
[Ptyelus spumarius] populi [nec Linne] Lambertie 1910a: 86 [Listed] 6 
Pt[yelus] spumarius populi [nec Linne] Lambertie 1910d: 16 [1] [Ecol¬ 
ogy] 6 
P[hilaenus] leucophthalm[us] populi [nec Linne] Horvath 191 Id: 600 
[Comparative note] 
Philaenus spumarius populi [nec Linne] Schumacher 1911a: 156 !j 
[Listed] 16 
[Philaenus spumarius] populi [nec Linne] Haupt 1912a: 180 [Key] 
[Philaenus spumarius] populi [nec Linne] Haupt 1912b: 449 (4)1 
[Listed] 19 
[Ptyelus spumarius] populi [nec Linne] Lallemand 1912a: 37 [Cata-1 
logued] Equals Cercopis populi Fabr. [nec Linne] Equals Philaenus l' 
populi Fabr. [nec Linne] Equals Ptyelus populi Fabr. [nec Linne] 
[Philaenus leucophthalmus] populi [nec Linne] Oshanin 1912a: 98 
[Listed] 
Philaenus [sic] spumarius populi [nec Linne] Schumacher 1912c: 95 jj 
[Listed] 20 ' 21 
[Philaenus spumarius] populi [nec Linne] Schmidt 1912g: 151 [Notes] I 
Philaenus spumarius populi [nec Linne] Schumacher 1912c: 95] 
[Listed] 16 - 20 
