Ctenoplusia placida (Moore, 1884)

Scientific name

Ctenoplusia placida (Moore, 1884)

Synonymy

Argyrogramma rhuscola Chou & Lu, 1979

Type-locality

Ceylon (Sri Lanka)

Distribution

Tamil Nadu

West Bengal

Himachal Pradesh

Punjab

Diagnosis

C. placida differs from its closely related species C. fracta (Walker, 1858) by its larger wingspan and more darker forewing colour with respect to other. Valva of C. placida broader with larger cucullus; vesica with group of small cornuti present on the middle structure apart from distal and basal cornuti.

Description

Wingspan 30-35 mm. Head and thorax olive-greyish mixed with whitish colour. Antennae filiform in both male and female.  Scape, pedicel and shaft furnished with  brown scales. Labial palpus upturned. Vertex and frons olive-greyish coloured. Thorax and collar also irrorated  with olive-greyish scales and white tinge in to it. Forewing triangular with pointed apex ground colour shining olive with grey scales present, intense metallic olive brilliancenin the terminal area. Basal and costal area irrorated with pinkish. Post medial and subterminal lines not sinous and forms a band like structure. Lower median area with shiny olive colour present in it. Hindwing olive brown coloured. Abdominal and anal tuft well developed. Male  genitalia with uncus long and curved; tegumen shorter and broader. Valvae broader and different in shape, there is  narrow constriction present between valvae and cucullus. Vinculum longer. Vesica with basal and single terminal cornutus present. Fine spinules present on the terminal vesica near cornutus. Female genitalia with oval corpus bursae; ductus bursae smaller and narrower; Ovipositor rather medium shaped, weakly sclerotised, papillae anales rounded.

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