NOTES ON THE SYNONYMY OF THE GENERA 

 INCLUDED IN THE TRIBE LACHNINI. 



H. F. Wilson, 

 Oregon Agricultural College. 



In taking up the preliminary work on what I term the sub- 

 family Lachninae it is very hard to ascertain the correct stand- 

 ing of several of the genera in the tribe Lachnini both from a 

 standpoint of literature and classification. 



Beginning with the original description of the genus Lachnus 

 the author will discuss the later genera as erected and invites 

 further discussion in order that the correct generic names may 

 be used in the future. 



The genus Lachnus Burmeister. Illiger is credited with 

 the genus, but in reality it belongs to Burmeister and was 

 published in 1835 in his Handbuch der Entomologie, p. 91. 



"3 (13) Gatt Lachnus 111. 

 Aphis autor. 



Eh. Fuhler dcutlich sechsgliederig, kurzcr als der Leib. Das 

 erste und zweite Glied kurz und dick, das dritte sehr lang, das viertc '2-'.\ 

 kurzcr, das ftmfte etwas langer als das dritte, das sechste klein, zuges- 

 pitzt bei einigen Artcn wic am Ende zusammen geschnurt und scheinbar 

 ein eigenes Glied bildend. Flugel mit starker Randrippe. Hinterleib 

 ohne Honigrohren hochstens mit zwei Hockern an deren Stelle. " 



Under this genus Burmeister gives seven species as follows: 



1. Lachnus lapidarius, (Fab.), which appears to be an 

 unrecognizable species. 



2. Lachnus jagi, (Linn.), which is now the type of the 

 genus Phyllaphis Koch. 1 



3. Lachnus quercus, (Linn.), which is now the type of the 

 genus Stomaphis Walker. 2 



4. Lachnus fasciatus, Burmeister, which Del Guercio has 

 recently placed in his Genus Lachniella. 3 



5. Lachnus Punctatus, Burmeister, which up to the present 

 time has not been definitely recognized (mav be viminalis 

 Boyer). 4 (?) 



1. Koch, Die Pflanzenlause Aphiden, 1857. p. 24S. 



2. Walker, The Zoologist, 1870, Vol. 28, p. 2000. 



3. "Redia," 1909, Vol. 5, fasc. 2, pp. 173-359. 



4. Boyer, Ann's Ent. Soc. France, 1841, p. 184. 



5i 



