38 BULLETIN 826, U. S. DEPARTMENT OF AGRICULTURE. 



Characters. — Cornicles extremely long and hairy; antennas of six segments armed 

 ■with oval or subcircular sensoria and distinct hairs. Fore wings with media twice 

 branched; hind wings with both media and cubitus present. Sexes winged. 



Type (monotypical), Siphonophora artocarpi Westw. 



Genus GREENIDEOIDA Van der Goot. 



Plate V, LHP. 



1900. Greenidea Wilson, not Schoutcden, Ann. Ent. Soc. Amer., v. 3, p. 317. 

 1916. Grecnideoida Van der Goot, Zur Kenntniss der Blattlause Java's, p. 1J0. 



Ill discussing the genera 'of the Trichosiphini in 1910, Wilson based 

 his descriptions and key on specimens in the collection of the Bureau 

 of Entomology. Material in that collection determined as artocarpi 

 by Pergande proves not to be that species for it does not agree with 

 the descriptions given either by Westwood or Schouteden. Wilson, 

 therefore, used the two generic terms Trichosiphum and Greenidea. 

 In reality the species listed as artocarpi was undescribed at that time 

 and the species of Trichosiphum presented all of, the characters of 

 Greenidea. Since that time Van der Goot has erected the genus 

 Greenideoida for such species as that understood by Wilson to be 

 artocarpi. 



Characters. — Cornicles present, very long, subeylindrical, and armed with long 

 hairs. Antennas of six segments armed with oval or subcircular sensoria. Fore wings 

 with the media once branched; hind wings reduced in size and lacking both the 

 media and cubitus. Cauda and anal plate rounded. 



Type (fixed by Van der Goot, 1916), Grecnideoida elongata V. d. Goot. 



Genus EUTRICHOSIPHUM Essig & Kuwana. 



Plate V, A-E. 

 1918. Eutrichosiplium Essig & Kuwana, Proc. Cal. Acad. ScL, v. S, no. 3, p. 97. 



The genus Eutrichosiplium Essig and Kuwana was erected for the 

 species pasaniae Okj . 



Characters. — Similar in general characters to Greenidea. Antennas of five segments) 

 armed with long hairs and somewhat oval sensoria. Cornicles very long, subcylindrical 

 and covered with hairs. Fore wings with the media twice branched, hind wings with 

 both media and cubitus present. Cauda and anal plate rounded. 



Type (monotypical), Trichosiphum, pasaniae Okj. 



Tribe SETAPHIDINL 



The correct position of the tribe Setaphidini is somewhat difficult 

 to ascertain. In some ways it closely resembles the Aphidim, and 

 in others suggests the Lachnini. 



It has Aphis-like antennae with, however, a reduced number of 

 segments. The venation of the wings is also reduced. On the other 

 hand it possesses cornicles situated on low flat cones somewhat like 

 those of the Anoecina or Lachnina. But these cones are devoid of 

 hairs. 



