Genus: Caltoris Swinhoe, 1893
Species: cormasa Hewitson, 1876
Wingspan of Adult Butterfly: 32-34mm
Caterpillar Local Host Plants: Ottochloa nodosa (Poaceae), Panicum maximum (Poaceae, common name: Guinea Grass), Ischaemum ciliare (Poaceae, common name: Smut Grass).
Physical Description of Adult Butterfly:
On the upperside, the wings are dark brown with hyaline spots in spaces 2,3 and 4, subapical spots in spaces 6 and 7 and two cell spots in the forewing. The upper cell spot is typically either absent or small in comparison to other Caltoris spp. On the underside, the wings are ferruginous brown, usually with a purplish tinge.
A close-up view of the forewing upperside, showing two small cell spots of a Full Stop Swift.
The upperside view of a newly eclosed Full Stop Swift. The upper cell spot is absent while the lower cell spot is small.
A Full Stop Swift visiting flower in a wasteland.
Field Observations of Butterfly Behaviour:
The Full Stop Swift is moderately common in Singapore. The adults have been sighted in multiple locations including forested areas, wastelands, urban parks and gardens across the island. The adults fly with a swift, strong and darting flight.