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first of all, dna is your best bet if you cannot find an expert to assist you with your id. it is expensive but it is useful in the case of poor documentation. I use dna testing from time-to-time but usually for spiders. I am currently researching dna kits for future usage.

genitalia is typically not included in publications if the author(s) feel that it is not necessary for identification. outdated material about Bombyliidae uses descriptions like keys which are prone to error nowadays because of new discoveries or overlooked problems (such as loss of bristles, hairs or scales.) However, modern keys do exist for many Bombyliidae. Even amateur work exists. for example: http://www.entomo...-Falck.pdf

certain Bombyliidae may need a revision but dna tests will be your key to the future. you can store the results in Bold Systems database. Such storage can be used after a revision has occurred to arrive at the newfangled species. I have records in the database for spiders. http://www.boldsy...

i do not know how you made your photos but it looks like flash is used. The wings are illuminated and unnatural in appearance. The wings almost look like glass or ice ( blown out by a strong lightsource.) Wing infuscation is barely detectable in these photos.

it is an overstatement to say that it is 'impossible to reach the species'. Even i am working on genitalia for Bobmbyliidae but it takes time to collect all of the species, dissect, identify (even if dna is necessary), then put together documentation. such a process will take years. I'm currently documenting Bombylius. I will continue to work on Villa this year. I'll add Villa genitalia to the diptera.info gallery when i can do so. However, genitalia can already be found here:

https://diptera.i...to_id=5492