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Echinargus isola (Reakirt, [1867])
(Reakirt’s Blue)

Pinned Specimens
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Larval Foodplants and Habitats
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Distribution and Larval Foodplants:

[= alce],  Dalea greggii Gray


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

Genus Echinargus Nabokov, 1945

Psyche 52(1/2): 27-28. Type-species: Lycaena isola Reakirt, [1867], Proc. Acad. Nat. Sci. Philad. 18(3): 332, no. 28, by original designation. K. Johnson and Bálint (1995), Reps. Mus. Nat. Hist. Univ. Wisc. (Stevens Point) (54): 1-15, placed this genus in the Polyommatus section.


Echinargus isola (Reakirt, [1867])

Proc. Acad. Nat. Sci. Philad. 18(3): 332, no. 28.

Original Combination: Lycaena isola

Type Locality: “Mexico (near Vera Cruz)” [Veracruz]

Types: Syntype said to be in FMNH, but possibly lost.

            =    nyagora (Boisduval, 1870)

Consid. Lépid. Guat.: 17.

Original Combination: Lycaena Nyagora

Type Locality: “Mexique...Honduras”; lectotype from “Mex.” [Mexico]

Types: Lectotype (#265591) in BMNH, designated by Bálint (1999), Neue Entomol. Nachr. 46: 8.

            =    alce (W. H. Edwards, 1871)

Trans. Am. Entomol. Soc. 3(3/4): 266, 272-273, no. 11.

Original Combination: Lycaena Alce

Type Locality: “Colorado”; defined as “Turkey Creek, Jefferson Co. and Georgetown, Clear Creek Co.” by F. Brown (1934), J. N. Y. Entomol. Soc. 42(2): 162; subsequently defined as “vicinity of Turkey Creek Junction on the old stage road between Denver and the mining fields of northern South Park” by F. Brown (1970), Trans. Am. Entomol. Soc. 96(3): 363; neotype from “Larkspur, Douglas Co., Colorado.”

Types: Neotype in CMNH, designated by F. Brown (1970), Trans. Am. Entomol. Soc. 96(3): 365, fig. 5 ♀ D&V.

Lamas (2004g), Atl. Neotrop. Lepid. Chcklst. Part 4A: 139, treated this taxon as a synonym of E. isola.



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