WOOLLY APIIIDS OF THE ELM. 2/7 



BETULA OE AE. BIRCH FAMILY. 



ALNUS. Alder. 



A. glutinosa (L.) 



Aphis alni Fab. (nicht A. aini Schrank) (A. maculata Heyden). 

 Kaltenbach, 1843, p. 138. 



Callipterus giganteus Choi. Cholodkovsky, 1S99, p. 474. 



Pterocallis alni (Fab.), Pass. Buckton, 3, p. 32. 

 A. incana (L.) Willd. Speckled or Hoary Alder. 



Callipterus giganteus Choi. Cholodkovsky, 1899, p. 474. 



Pemphigus tessellata Fitch (acerifolii Riley). Patch, 1908, p. 484. 



Vaciina alni (Schrank) Pass. (V. betrlae Kalt.'i (C.lyphina 

 betulae Koch). Passerini, 1863, p. 84. 

 A. rhombifolia Nutt. 



Euceraphis flava Davidson. Davidson, 1912, p. 406. 



Mysocallis alni (Fab). Essig, 1912, Aphid. So Cal. X, p. 767. 

 A. rubra Boug. 



Lachnus alnifoliac Fitch. Williams, 1891, p. 5. 



Pemphigus tessellata Fitch (Chermes alni Kalm). Hunter, 1901, 

 p. 79. 



A. sp. 



Aphis alni Fab. Kaltenbach, 1874, p. 620. 



Aphis alni Schrank. Kaltenbach, 1874, p. 620. 



Aphis bifrons Walker. Walker, 1848a, p. 444. "On alder?" 



Callipterus (Pterocallis) alni Fab. Davis. 1910b, p. 41$. 



Glyphina alni Schrank. Lichtenstein, La Flore. 



Lachnus ahiifoiiac Fitch. Thomas, 1879, p. 118. Essig, 1912, 



Aphid. So. Cal. X, p. 773. 

 Pemphigus alni Provancher. Kirkaldy, 1906, p. 15. 

 Pterocallis maculata Heyden. Lichtenstein, La Flore. 



BETULA. Birch. 



B. alba L. (papyracea Ait) (pubescens Ehrh) (papyrifera Marsh). 



Paper, Canoe or White Birch. 

 Aphis antennata Kalt. Kaltenbach, 1843, p. 115. 

 Aphis betularia Kalt. (A. tuberculata Heyden). Kaltenbach, 



1843, p. 120. 

 Aphis comes Walker. Walker, 1848a, p. 258. 

 Aphis nigritarsis Heyden. Kaltenbach, 1843, p. 135. 

 Aphis guadrituberculata Kalt. Kaltenbach, 1843, p. 134. 

 Callipterus bctiilicola (Kalt.?) (C. betulae Koch). Buckton, 3, 



p. 16. 

 Callipterus betulaecolens (Fitch) Monell. Davis, 1909a, p. 30. 

 Callipterus oblongus Heyden (Aphis oblonga Heyden) Del 



Ciiercio, 1900, p. 11 1. 

 Chaitophorus betulae Buckton (?). Gillette, 1910, p. ;i6j. 



