246 



STOBERA CONCINNA, Stal. 

 Delphax concinna, Stal, Of. Vet. Akad. Forh. XI, p. 246, 1854. 

 Stobera concinna, Stal, Berl. Ent. Zeits., Ill, p. 327, 1859. 



"Fusco-testacea {i), vel pallida (?); fascia lata frontis genarumque, 

 niaculis marginalibus abdominis parvis, pedibusque pallidis, his nigro-an- 

 nulatis; tegniinibus vitreis, fascia obliqua ante medium, fasciis 2 opposite 

 obliquis, una mox pone medium, altera prope apicem, ad commisuram con- 

 junctis, fusis; venis fusco-punctatis. Long, cum tegm. 4}4 millim. Patria: 

 Mexico." 



This probably is not distinct from the preceding but I refrain from 

 uniting them at present on account of Stal's note appended to his later 

 description which reads: "Adset in Museo Berolinensis species e Pensylva- 

 nia S. concinnae maxime affinis et similis." Assuming this note to refer to 

 tricarinata, which is more than probable, it is evident that Dr. Stal con- 

 sidered thisadistinct but closely allied species. So that it seems advisable 

 to retain both names until the question can be settled by the study of a wider 

 range of material than is now at my disposal. 



STOBERA BIFASCIATA, (Prov.) 

 Delphax bifasciata, Prov., Pet. Faune Ent. du Can., Ill, p. 337, 1890. 

 This is without doubt but a slightly immature form of tricarinata. 

 Were it not for Provancher's remark — "son front est blanchatre" [ would 

 not hesitate for a moment to place it as a synonym of that species. I have 

 seen unquestionable specimens of tricarinata that agree with his description 

 in every respect except the pale front. 



GENUS LIBURNIA, Stal. 



Stal, Hemipt. Africana IV, pp. 176 and 179, 1866. 



Sahlberg, Cicadariaj p. 422, 1871. 



Fieber, Cicad. d'Europe I, p. 89, 1875; II, pi. 8, 1876. 



Edwards, Trans. Ent. Soc. Lond., 1886, p 51. 



Delphax, Fieber Ver. der Zool. Bot. Ges. Wien, XVI, p. 520, 1866. 



Amyot & Serv., Hemipt. p. 512, 1843. (in part) 



Berg, Hemipt. Argent, p. 223, 1879. 



Mayr, Tabellen I, p. 20, 1884. 



Ashmead, Ent. Am. V, p. 26, 1889. 



Prov., Pet. Faune Ent. du Can. Ill, p. 223, 1S89. 



Stal in 1866 first restricted the genus Delphax to clavicornis and its 

 allies, on the ground, apparently, that clavicornis was the first species de- 

 scribed by Fabricius under this generic name and therefore should be con- 

 sidered the type; thus making Delphax synonymous with Asiraca and dis- 

 placing the latter generic name. Many European Hemipterists still retain 

 the name Delphax for the present genus. But Delphax has long been em- 



