Female scale white, but obscured by tissue of host, nearly circular. Exuviae marginal and project beyond the edge of scale (Comstock, 1883).
Adult female large, broadly turbinate: head, thorax, and anterior abdominal segments heavily sclerotised, pygidium broadly rounded. Important diagnostic characters are the large prominent median lobes set close together, outer margins longer than inner margins, serrate and slanting; each lobe with a prominent clavate sclerosis arising from inner corner. 2nd lobes each reduced to a small conical process. Gland spines present between median lobes short; long gland spines present in segmental groupings of 4 or 5 forward to abdominal segment 5. Dorsal ducts numerous on margins of pygidium and present in submarginal and submedian groups. Perivulvar pores absent.
Keys
Miller & Davidson (2005). Suh & Ji 2009: 1041-1043 (female) [Key to species of armored scales intercepted on imported plants (slide mounted females)]; Wolff & Corseuil 1993a: 153 (female) [Diaspidid species on mango in Brazil]; Williams & Watson 1988: 137 [Key to species of Howardia]; Fullaway 1932: 96 (female) [Key to species of Hawaiian Diaspinae]; Comstock 1916: 559 (female) [as Chionaspis biclavis; Key to species of Chionaspis]; Green 1899a: 108 (female) [as Chionaspis biclavis; Synopsis of Chionaspis species]; Comstock 1881a: 98 [as Chionaspis biclavis; Key to species of Chionaspis].
