Butterflies of Mexico, USA & Canada
Boisduval's Grass Yellow
Eurema arbela ( boisduvaliana ) GEYER, 1832
subfamily - COLIADINAE
Eurema arbela Peter Bruce-Jones
The genus Eurema was until fairly recently represented in North, Central and South America by 31 species, but phylogenetic analysis has led to 12 of these being reassigned to Pyrisitia, leaving a total of 19 currently recognised Eurema species in the Americas. Elsewhere in the world 11 species are found in Africa, 2 in Madagascar, and 9 in the Oriental and Australian regions.
These smallish butterflies are characterised by having yellow or white uppersides, with dark apical markings. The forewings have a strongly curved costa and a squarish apex. In most species the hindwings are rounded, but in salome, mexicana and arbela the termen is projected to a point.
The various species can be told apart by the pattern of mottled dark markings on the underside hindwings, and by the black borders on the upperside forewings, which differ according to species.
Eurema arbela is found from Mexico to Bolivia.
This species was previously known as Eurema boisduvaliana, hence the common name.
This is a pre-montane cloudforest species, occurring along roadsides, riverbanks and forest edge habitats at elevations between about 400-2000m.
To be completed.
Adult behaviour

Males are usually encountered singly, or occasionally in two's or three's, seen imbibing dissolved minerals from damp ground at the edge of ditches, runnels or roadside banks in forested areas.

Females are more often seen nectaring at flowers along roadsides and riverbanks, or when exploring sunny wood edge habitats in search of egg-laying sites.

The flight is fluttery but fairly rapid, and always close to the ground.



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