14 



159) for 51 nuiiiljer of species agreeing with the characters of Macro- 

 siphuin Oesthmd, overlooking, however, the fact that Macrosiphum 

 was preoccupied l)y Passerini for a genus structurally quite differ- 

 ent. Dr. M, II. Schoutenden was the first to observe this error, and 

 changed Macrosiphum Oe-stlund to Nectarosiphon, in contradistinction 

 to Macrosiphiun I'ds^crin/. 



The principal characters of this genus, as accepted b}' authors, are: 



Genus Macrosiphum /'a.s.srrm(. 



Front of head deeply eoncave, proviiled with large, terminally <liverging frontal 

 tubercles or projections for supports of the antenme. Antenna; long and filiform, as 

 long or usually much longer than to the end of the body or tail, with the si:)ur of 

 the sixth joint very long and bristle-like. Nectaries very long, cylindrical, tajjcring, 

 and frequently projecting beyond the tail. "Tail long, slender, more or less distinctly 

 contracted near its base, curved upward. Legs long and slender. Wings large, the 

 third discoidal vein with two forks; stigma rather long, narrow, elongate lanceolate. 

 The majority of the species are large and frequent the foliage of weeds, cultivated 

 plants, and grasses. 



Macrosiplium granaria Buckton. 



SiphonopJiora grdudriii Buckton, Monogr. of British Aphides, vol. 1, p. 114, 1876. 

 Siphondpliora avenx Thomas (in part). Eighth ReiJt. Nox. and Benef. Insects 

 of 111., p. 51, 1879. 



With regard to this species nuich uncertainty has existed. Buck- 

 ton was the first to introduce this name in his writings on English 

 Aphides, on the supposition that the insect in his hands at the time 

 was identical with that treated of hy Kirby and Curtis under the name 

 of Aj)his gj'anaria^ concluding also that ^1. civenm Fab., hordel Kyber, 

 cerealis Kalt., and Siph. cereal Is Koch were all of them the same 

 species. After examining, however, the extremely short and in every 

 detail insufficient description of ^1. granaria \i\ Kirby (Linn. Soc, 4, 

 p. 238, 1798), I doubt very much that the species mentioned by Kirb}^ 

 and Curtis under the above name is identical with the one described 

 by Buckton, but believe that the species treated of by them was the gen- 

 uine ^l/>///6' aoenx Fab., and, while investigating this matter, found that 

 a description of A. liordel was never published and that the name of it 

 was simply suggested by Kyber (Germar's Mag. d. Entomologie, 

 vol. 1, pt. 2, p. 11, 1815), with a footnote to the effect that he 

 intended to describe the species later on. It was surelj' not identical 

 with A. cereidls Kalt. and Koch, which 1 have known for some years 

 to exist in this country. Buckton, while describing his granaria, 

 seems to have mainly depended on the superficial description of the 

 species by Curtis (Farm Insects, pp. 287-290, figs. 9, 10, 11, and PI. J, 

 figs. 10, 11, 13, 1860, the figures of which are absolutely unreliable). 

 As far as the description of aveiim is concerned, I am confident that it 

 does not belong to Siphonophora Koch^ since the frontal tubercles so 

 characteristic of Siphonophora are wanting. Curtis states that the 



