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Paqui:

You need a Catalog to reveal species descriptions (e.g. Catalogue of Palaearctic Diptera).

For Bombylidae on worldwide scale look at: World catalog of bee flies.

In the bibliography you will find what you are looking for:

Francois, F. J. J. (1970): Bombyliidae (Diptera) Meconnus. V. Un Hemipenthes orophile nouveau: H. villeneuvei. - Bull. Ann. Soc. R. Entomol. Belg. 106: 203-205.

so long,
xylo