GENERIC CLASSIFICATION OF APHIDIDAE. 89 
writer considers composed of apterous forms, which really belong in 
older and well-recognized genera, but which can not be definitely 
placed until the alate forms have been secured and studied. 
Genus SCHOUTEDENIA Riibsaamen. 
1905. Schoutedenia Riibsaamen, Marcellia, v. 4, p. 19. 
This genus, which was described for rdlumensis Rub., is here listed 
as unknown. The gall formed by the species is described but the 
writer, never having been able to obtain either gall or insect, would 
be able only to guess at its position from the description. 
Genus CLAVIGERUS Szepligeti. 
Clavigerus Szepligeti, Rovaraszati Lapok, v. 1, p. 4. 
This genus was described in the only volume issued of the Journal 
cited. The writer has been unable to secure a copy or any details 
of the description given. 
ADDENDA. 
The following generic names have been employed by Mordwilko 
(Fauna Russ. vol. 1, Aphidodea) without, apparently, the mention 
of any species in connection therewith. They have not been con- 
sidered in the foregoing paper: Anameson, Aorison, Chaetosiphon, 
Corylobium, Elatobium, Euaulax, Eurythaphis, Halmodaphis, 
Impatientinum, Jaxart aphis, Nasonovia, Orobion, Paczoskia, 
Sitobium, Staticobium, Tlja, Turanaphis, Uroleucon (subgenus), 
Uromelan. The subgenera Dactynotus Raf., Cladoxus Raf., and 
Adactynus Raf., have not been considered. 
