2 PROCEEDINGS OF THE NATIOlS^U MII^EUIV. vol. 67 



Dr. A. C. Baker of this Bureau, under whose immediate direction 

 the work has been done, has given many valuable suggestions and 

 has helped in many ways. The writer also wishes to thank Dr. A. L. 

 Quaintance for making it possible to undertake the work. 



Genus AMPHOROPHORA 



Amphorophora Buckton, British Aphides, vol. 1, 1876, p. 187. 

 Macrosiphum Oestlund, Minn. Geol. Survey Rept., no. 14, 1886, p. 27. 

 Macrosiphum Del Guercio, Nuove Rel. Staz. Firenze, ser. 1, 1900, no. 2, 



p. 159. 

 Nectarosiphon Schouteden, Ann. Ent. Soc. Belg., ser. 5, vol. 45, 1901, p. 112. 

 Eunectarosiphon Del Guercio, Redia, vol. 9, 1913, p. 188. 

 Rhopalosiphum Van der Goot, Tijd. voor Ent., vol. 56, 1913, p. 146. 



The above is copied from Baker's Generic Bulletin.^ For a dis- 

 cussion of this synonymy see Baker's paper. The species convolvuli 

 Kaltenbach, which he refers to Amphorophora in his discussion proves 

 to be a Myzus, according to letters received by the writer from both 

 Laing and Theobald, 



I am of the opinion that Baker's characterization of the genus 

 should be modified so as to exclude certain species in which the 

 antennal tubercles are covered with small scales or imbrications. 

 Tubercles of this type may be either converging or diverging. I am 

 excluding these species from my conception of Amphorophora and 

 leaving them for a future study. 



The antennae are usually longer than the body, dark colored in 

 the majority of the species, and imbricated. Tiie sensoria are sub- 

 circular and vary greatly in number in the different species, some 

 having only a row on segment III, while other species have segments 

 III, IV, and V thickly covered. The hairs are plainly capitate on 

 some species. In other species they are indistinctly so, if at all. 

 The hairs are sometimes nearly as long as the width of segment III, 

 while in other species they are very minute. 



The antennal tubercles are very prominent in most species, but 

 occasionally are almost wanting on the outer side. 



The beak usually reaches about to the second coxae, but may be 

 longer. 



The wing venation is normal. Some Amphorophorus-\ike species 

 have a brownish tinge to the veins but most of these fall in the group 

 with imbricated antennal tubercles, which I am excluding from the 

 genus. A few species are dusky near the tip of the wing. 



The legs are very long, the posterior ones being much longer than 

 the length of the body. 



The cornicles are long, much longer, as a rule, than the cauda. I 

 have given considerable latitude to the amount of dilation, some 



' U. S. Dcpt. Agr. Bull. 826, p. 54. 



