332 



of the fifth a])doiniiial segment, brown over the l)asal two-thirds 

 of elavus, fnscous or bhick over the rest, the margins thick, the 

 a])ical margin and hind margin of clavus white. Length 1.0 

 mm. ; tegnien .7 mm. 



(icnns Delpiiacodes Fieher. 



D('lj)/i(iro<l('s Ficli. subgenns of Deljdnix, Idgotvjx' iiiiilsaiiH 

 Fieb., Verb. z. b. Ges. Wien XVI (ISCH). ]). ^lU. PI. 

 VIII, fig. 32. 



Li/) III Ilia Stal 18()<), Hem. Afr. IV, pp. I7(i, 170, in part. 

 Dclplia.r Fabricius Ent. Svst. SnppL (179S), p. r)ll, in part 

 (and other anthors). 



In listing the genera of Delphacidae I retained the name 

 Libnniia Stal with Dclpliax pelhirida Fabv. as its type* for the 

 largest gron]) of species in the family, thinking that by so doing 

 it wonld canse the least amonnt of change. A reconsideration 

 of the matter has convinced me tliat this name cannot be main- 

 tained. 



Fabricins descriljed the genns Dciphcnv (1798) in which he 

 placed rrassiconiis. chiciconiis and, at a later date, pcAlucida 

 and other species. There is no sncli genus as Dclpliax Latr. 

 1S()7; in that year Latreille vainly tried to fix prllnrida Fab. 

 as the type of Dcl/i/ia.v Fab. Stal and other writers described 

 species under Del pliax Fab. (not Dclpliax Latr. ) which were 

 congeneric with pclliicidn but not with ciitsslconiis. in 1S(»(; 

 Stal recognized that cnissiconiis was the tvjx' of Ddphax and 

 so he erected the new genus Lihiirnni to contain those species 

 of Ih'Iplia.r which wei'c not congeneric willi ci iissiconiis. As 

 synonyms of Lihiiniia he gave Dclplia.r Auctoi- and J'Jinholo- 

 pliora Stal IS,");!, and mentioned seven sjx-cies. li has been 

 contench'd that the sections a and a. a. usa] by Stal t(» ilivide 

 his species of Lihinina are subgeiU'ric. I cannot agree with 

 this cout(Miti<in as Stal nowbei-e states this to he ihe case and 

 he gave no subgeiieric names to the di\isions. hi the same 

 work on ])ages IT) to 41 he deals with the genus 'rihiccn hati'. 

 and divides it into suhucnei-a wliicli he names and dess-rilx's, 



1 



I 



* Canadian Entomologist, 191.'), p. 2(i.') 



