332 



cf the fifth abdominal segment, brown over the l)asal two-thirds 

 of clavus, fuscous or black over the rest, the margins thick, the 

 ai)ical margin and hind margin of chivus white. Lengtli iJi 

 mm. ; tegmeii .7 mm. 



Genus Deli'iiacodes Fieber. 



DelphacodcK Fieb. subgenus of Delphax, logotype niidsanti 

 Fieb., Verb. /. b. Ges. Wien XVI (18(50), p. r)24, PI. 

 VIII, fig. 32. 

 Lihurnia Stal 186G, Hem. Afr. IV, pp. 170, 170, in part. 

 DrJplKt.r Fabricius Ent. Syst. Suppl. (1708), j). r>ll, in i)art 

 (and other authors). 



In listing the genera of Delphacidae I retained the name 

 Lthm-nia Stal with Delpha.r prilurida Fabr. as its type" for the 

 largest group of species in the family, thinking that by so doing 

 it would cause the least amount of change. A reconsideration 

 of the matter has convinced me that tliis name cannot be main- 

 tained. 



Fabricius described the genus Delphax (1708) in which he 

 ])laced crassicornls. clavicornis and, at a later date, pclliicida 

 and other species. There is no such genus as Delphax Latr. 

 1807; in that year Latreille vainly tried to fix pelltieida Fab. 

 as the type of Delpliax Fab. Stal and othei- writers described 

 species under Delphax Fal). (not Delphax L:itr. ) which were 

 congeneric with pelluelda but not with erassicom'is. In 18(;(; 

 Stal recognized that rrasslcornls was the ty])e of Delphax and 

 so he erected the new genus Idhuniia to contain those s])ecies 

 of Delphax which were not congeneric with ciii-'^sicoriils. As 

 synonyms of Llhiinila he gave Delpha.r Anctoi- and h'lnholo- 

 phura Stal 18r).'5, and mentioned seven species. Jt has been 

 contended that the sections a and axi. used by Stal to divide 

 his s])ecics of Lihnnila ai'e subgeueiMc. I cannot agi'ce with 

 this contention as Stal nowhere states this to be the case and 

 he gave no subgeneric names to the divisions. In the same 

 work on ])ages l.") to 41 he deals with the genus T'dileen Latr. 

 and dix'ides if into subgenera wliich he names and describes, 



Canadian Entomologist, 191;'), p. 26^ 



