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Dixeia pigea
The Ant-heap Small White〔Williams, M. (1994). ''Butterflies of Southern Africa; A Field Guide''. Southern Book Publishers. ISBN 1-86812-516-5.〕 or Ant-heap White〔Markku Savela's pages: (''Dixeia'' ), retrieved 4 August 2010.〕 (''Dixeia pigea'') is a butterfly in the Pieridae family and is native to Africa.
==Description==
The wingspan is 40–48 mm for males and 40–52 mm for females.〔Woodhall, S. (2005) ''Field Guide to Butterflies of South Africa'' Struik Publishers, Cape Town. ISBN 1-86872-724-6.〕 The upperside of the wings of males is pure white with a narrow black forewing tip and small black dots on the hindwing margin.〔 The underside is whitish with two rows of black spots on the hindwings,〔 with the inner row sometimes absent or incomplete. The female has several colour forms,〔 but is usually pale yellowish-white on the uppersurface with heavier black markings than the male,〔 and has a dark spot on each forewing. There is a rare female form (''luteola''〔) where the upperside is orange-yellow〔 or deep apricot.〔 The underside of females is similar to the male but the rows of black dots are more pronounced and the base colour is pale to bright yellow. Another rare form (''rubrobasalis'') has orange suffusion at the base of the underside of the forwing〔 and a creamy-yellow upperside.〔 The dry season form (''alba''〔) has reduced black markings.〔 A distinguishing feature of ''D. pigea'' is that the hindwing costal has a yellow streak, unlike other ''Dixeia'' species.〔
File:Ant-heap_White_6016_Sharp_IC_&_A_2009-01-29_Limpopo.jpg|Female form ''rubrobasalis'' from Limpopo Province, South Africa Photo: Sharp I.C. & Sharp A.
File:Ant-heap_White_male_side_30_07_2010.JPG|Male viewed from the side; showing the yellow streak on the hindwing
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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