Synonyms and other taxonomic changes
Orig. Comb:
Cimex anchorago Fabricius 1775
A handsome species that comes in a variety of color forms. There is only one North American species recognized in this genus. In 1971 two entomologists proposed a new species, Stiretrus fimbriatus, but others believed the proposed species was simply a color variant of S. anchorago.
Stiretrus anchorago
Explanation of Names
anchorago is Latin, though the exact meaning and origin is unclear. One possibility is that it comes from anchora- "anchor" + ago- "to act, do", with the implication of acting as or putting on the appearance of an anchor. While the correct spelling would be ancora, anchora was an alternate spelling that first appeared in the Middle Ages, and could still be found in some dictionaries in Fabricius' day.
The other possibility is that Fabricius used the word
anchorago (also spelled
ancorago, being perhaps an alteration of
ancoratus (Adams, 2007,
The Regional Diversification of Latin, p. 296--via
Googlebooks). This is an obscure term for a fish said to be found in the Rhine. Modern speculation is that it is most likely a salmon, especially the breeding form with hooked jaws (Adams, 2007 and
LATCict). Adams suggests it is based on a compound of
Gaulish anco (bent, crooked) plus
rago (before, in front), meaning "fish with a hooked snout". While it's tempting to connect the meaning with attributes of the salmon, Fabricius would only have known it as a word for some species of fish.
Identification
Both markings and color are variable, but generally includes a variably-shaped dark central band running from the head toward the rear of the insect. The pale area on the right and left sides of the pronotum contain one to three dark spots (usually two). The dark color is dark blue to black. The light color may be white, pink, yellow, orange, or red.
Nymphs:
Boris Buche offers this tip to distinguish this genus from genus
Zicrona: Profemora with strong tooth (without tooth in
Zicrona).
Range
TX-FL-ME-? / Ont. (BG data)
Habitat
Found on a wide variety of herbaceous plants.
Season
Mar-Nov, Most: Jul-Sep (BG data)
Food
Adults feed on the larvae of beetles, butterflies, and moths. Stiretrus anchorago is considered an economically beneficial insect, feeding on the larvae of the Mexican Bean Beetle, among other pest species.
Life Cycle
Eggs typically take seven days to hatch. The progression through the five instars takes another 25-35 days.
Print References
Salsbury, p. 96--photo
(2)
Slater, p. 42, fig. 49
(3)
Swan and Papp, p. 129, fig. 126
(4)Internet References
Featured Creatures - David B. Richman and Frank W. Mead, 2001
Systema entomologiae, p.699 Fabricius' original description of the species
