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Thank you Paul and John,

my first approach was the key provided in the Drosophila species guide, but I could not always decide on a character described, so I followed both branches (e.g., coxa darker than rest of leg? There is some dark patterning, but not throughout the coxa - thus I don't know if this qualifies...) In the end, I came up with a list of possible candidates. It must be somewhere in the repleta-group and, if this might exclude some, they can be raised on standard Drosophila corn meal medium. I guess e.g. D. mojavensis needs a special diet?
And, as Paul mentioned, what about a certain strain of D. hydei with brighter eyes and different body size?
At a first glance, the male genitalia they looked similar to D. hydei...