Abstract
Attempts at crossbreeding Delia florilega (Zetterstedt) and D. platura (Meigen) were unsuccessful, indicating that these are biologically distinct species. Examination of 1,000 newly emerged females each of D. florilega and D. platura revealed that a typical female D. florilega bears one bristle each on the anterodorsal and posterodorsal surfaces while that of D. platura bears one or two on the anterodorsal and two on the posterodorsal surfaces of the mesothoracic tibia. Using undamaged flies, this new method of identification will allow more accurate separation of the females of the two species than the previous method of using the preapical setula on the metathoracic tibia.
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