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 Cerambycidae Cerambycinae
 Clytini
 India, Xylotrechus subscutellatus & smei
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sangamesh
Member Purpuricenus

India
426 Posts

Posted - 09/02/2015 :  19:22:32  Show Profile  Email Poster  Reply with Quote

118.86 KB
12mm...Xylotrechus subscutellatus?



222.45 KB
14mm...Xylotrechus smei?

very hard to differentiate these two species...

Edited by - Gerard on 30/01/2016 15:28:20

Francesco
Forum Admin

Luxembourg
9454 Posts

Posted - 09/02/2015 :  20:42:20  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
Yes, both ID are exact.

According to Gahan (1906) X. subscutellatus has
- dark brown integuments (brown in X. smei or reddish in immature specimens),
- yellow (greyish or slightly yellowish in X. smei) and complete elytral pattern (oft reduced to spots or missing in X. smei males)
- postbasal spot normally larger, curved and united to the scutellum (finer and separated from the scutellum in X. smei).

From what I have seen X. subscutellatus often shows reddish legs in specimens with dark elytra, while reddish legs are always related to immature specimens in X. smei.
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