OF \VASH1NCTON, YOLUMK XII, I'.llll. 27 







NOTES ON THE TWO PAPERS ON APHIDID^E BY 



RAFINESQUE. 



BY H. F. WILSON. 



These papers were published in the American Monthly 

 Magazine and Critical Review, Vol. I, 1817, pp. 16-18, and 

 Vol. Ill, 1818, pp. 360-302. 



In the first paper he described 12 new species and erected 

 two genera. In the second he described 24 additional species and 

 two new genera. 



^T do not understand why these papers should have been so 

 long overlooked or ignored. It is true that the descriptions 

 are short, yet the names will have to be accepted in aphid 

 nomenclature, and some, if not all, of the species described 

 are distinguishable. During the past summer an effort was 

 ma le to locate some of these species, by collecting specimens 

 from the plants named by Rafinesque and comparing them 

 with his descriptions. I was partially successful and am con- 

 vinced of the identity of the species indicated in this paper. 

 All of the species were placed in genera and groups according 

 to the length of the antennae and appendages (nectaries). 



The apterous forms were considered to be females and the 

 winged forms males. 



A few species given as not having appendages may not be 

 recognizable. The descriptions were numbered from 1 to 36, 

 and I have started with No. 1, making a note under each 

 species. Those species before which the asterisk (*) is given 

 were not located by me. Another season an effort will be 

 made to locate these. 



LIST OF SPECIES. 



1. * Aphis diervilla-lutea Raf., p. .'!(>( >. 



1. * Aphis ar alia his pi da Raf., p. 3<iO. 



:;. * Aphis aquilegia-canadensis Raf., p. :'>(>!. 



4. Aphis hieraciiim-venosum Raf.. p. :->i>1. 



.">. * Aphis melampyrum-latifolium Raf., p. .'-!(> 1. 



i). Aphis pteris-aquilinoides Raf., p. 361. 



7. Aphis campanula-riparia Raf.. p. :!(il. 



8. * A phis chenophyllum-canadense Raf., p. :!i>l. 

 '.i. * Aphis erigeron-philadelphicum Raf., p. :;<>!. 



In. Aphis verticolor Raf., p. .">.'!!., on Hieracium -venosuni and Cii '/nv . 



acerus. 



11. * Aphis furceps Raf., p. .'!<>!, on Primula veris and Bellis perennis. 

 1-J. Aphis fuscilava Raf., p. o<>l, on garden plants. Apparently not 



an aphid. (List of first paper, 1S17.) 



