The morfological characteristics of the female gen Italia of Llrlomyza huldobrensis (Blanchard) and Llrlomyza trifolli (Burgess) are the most important features in the identification of these two species. The gen Italia of L. huldobrensis is larger. The egg gulde is longer and wider, pegs are shorter, stralght and localized on the same lavel and over a definite area on the distal part of IX abdominal segmento