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Plebejus idas atrapraetextus W. D. Field, 1939
(Northern Blue)

Type Specimens photo collection:

Pinned Specimens photo collection:

Distribution and Larval Foodplants:



(From: A Catalogue of the Butterflies of the United States and Canada, Jonathan P. Pelham)

Genus Plebejus Kluk, 1780

Zwierz. Hist. Nat. Pocz. Gospod. 4: 89-92, no. 148. Type-species: Papilio argus Linnaeus, 1758, Syst. Nat. (ed. 10) 1: 483, no. 152, by designation of Hemming (1933), Entomol. 66(845): 224. I.C.Z.N. Opinion 278 placed Plebejus on the Official List of Generic Names in Zoology as name no. 705. This name has been spelled various ways; the spelling given in the Official List is the proper spelling by rule (Code Article 79.4.1). Bálint et al. (2001), Folia Entomol. Hung. 62: 177-184, discussed this issue.


Plebejus idas (Linnaeus, 1761)

Fauna Svecica (ed. 2): 284, no. 1075; cited Linnaeus (1746), Fauna Svecica: 247, nos. 804-805, and Ray (1710), Hist. Ins. Ins.: 131, no. 12.

Original Combination: P[apilio]. P[lebejus ruricola]. Idas

Type Locality: “Ericetis”; “Svecica” determined by I.C.Z.N. Opinion 269.

Types: Types apparently lost.

I.C.Z.N. Opinion 269 gave priority to this name over Papilio idas Linnaeus, 1758, Syst. Nat. (ed. 10) 1: 488 no. 192, determined this species by reference to the male genitalia figured by Chapman (1917), in: Oberthür, Étud. Lépid. Comp. 14: pl. 3, fig. 7 ♂ genitalia, and placed this name on the Official List of Specific Names in Zoology as name no. 85.

            =    acreon (Fabricius, 1787)

Mantissa Ins. 2: 76, no. 699.

Original Combination: P[apilio]. P[lebejus]. R[uralis]. Acreon

Type Locality: “Russia meridionali”

Types: Syntypes in HMUG.

            =    amphion (Fabricius, 1793)

Entomol. Syst. 3(1): 301, no. 139.

Original Combination: H[esperia]. R[uralis]. Amphion

Type Locality: “Germania” [Germany]

Types: Type(s) probably lost.


Plebejus idas atrapraetextus W. D. Field, 1939

J. Kansas Entomol. Soc. 12(4): 135-136.

Original Combination: Plebeius scudderi atrapraetextus

Type Locality: “Priest River, Idaho” [Bonner County]

Types: Holotype in USNM.

                   =    sweadneri F. Chermock, 1945

Can. Entomol. 76(11): 214.

Original Combination: Plebeius scudderi sweadneri

Type Locality: “Uranus Peak, Shoshone Co., Idaho, altitude 5200 feet”

Types: Holotype in MGCL.



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