Copestylum violaceum, (SAY, 1829)

Rotheray, Graham E., Marcos-García, Maria-Angeles, Hancock, Geoff, Pérez-Bañón, Celeste & Maier, Chris T., 2009, Neotropical Copestylum (Diptera, Syrphidae) breeding in Agavaceae and Cactaceae including seven new species, Zoological Journal of the Linnean Society 156 (4), pp. 697-749 : 720

COPESTYLUM VIOLACEUM (SAY, 1829)

Larva and puparium: Posterior breathing tube shiny below TR. AP shiny, faintly punctured about as long as TR is wide, and with a shallow depression just below apex not forming a complete longitudinal groove to the TR. AP about as long as TR is wide. Pupal spiracles curved in upper half and about 1.6¥ apart as pupal spiracle is long.

Taxonomic notes: This species may be distinguished from others in the group by the slightly curved pupal spiracles and the faintly punctured AP which is about as long as the TR is wide.

Material examined: 2 ♀, two puparia MEXICO Hidalgo 26.iii.1924 no other data ( SI) ; 5 ♂, five puparia MEXICO Hidalgo, Metztitlán 19.viii– 3.ix.2005 ex columnar cactus M. A. M. ( CIBIO, NMS) .