again you have dealt with the issue by changing the subject from what I am talking about, LIVE mealworms, to what you want to talk about, dried mealworms. It is not a better source if it deals with a different thing!Better source:
https://www.sciencedirect.com/science/article/pii/S003257911930906X
(that's the meal, with moisture content reduced from about 60% to just 4%). At those levels, dry matter about 95%, crude protein about 52% (as fed), neutral plus acid detergent fiber around 21% (as fed), and fat around 28% (as fed).
Fresh Mealworms (per feedipedia) are here. We are using that source for the complete A A profile (keep in mind, these are averages with a very small sample size, some variation to be expected)
The four key are:
Met 1.5% of protein (range of 1.3 - 2.0)
Lys 5.4 % of protein (range of 4.6 - 6.1)
Thre 4.0 % of (3.5-4.4)
Tryp 0.6% of (0.0-0.9)
Sadly, we are suffering some imperfect sources, and I'm not sure how long the break in the rain will last. So I don't have time to search better, but I hope you can follow along.
Now, once again from feedipedia, here are earthworms. (meal, that is, dried) Again, averages. 90% dry matter, 57% protein as % dry matter, 9% fat as % dry matter, NDF + ADF 19.4% as % of dry matter. Dry matter was 90%, so "as fed" (the numbers used in the study above) the dried Earthowrms are around 51% protein, 8% fat, 17% fiber - apart from the much lower fat numbers, that's pretty comparable.
As to the protein itself, lets look at its AA makeup. Same four
Met 1.8% (1.5-2.7 range)
Lys 7.0% (5.4-8.5 range)
Thre 4.1% (2.3-5.5 range)
Tryp 1.0% (0.6-1.3 range)
The variation in the tested earthworm samples is greater (except in Tryp), and we are suffering from small sample sizes in every case with just a handful of data sets averaged together from various studies), but I would judge those similar, with a nod to earthworms as the superior source (if Met, Lys, or lower associated total fat are your measures).
and because the rain is holding off, here's dried BSFL (since they've been mentioned), again feedipedia (and again, averages, small sample sizes) for those interested. I'll do the math for "as fed".
Approx 38% protein, 24% fat (they only listed crude fiber, not ADF and NDF, so no direct comparisons). AAs as percent of total protein:
Met 2.1% (1.7-2.4)
Lys 6.6% (6.0-8.0)
Thre 3.7% (1.3-4.8) Huge variation!
Tryp 0.5% (only one sample)
Of the three, the BSFL due to its significantly average lower protein and high fat, together with a not markedly superior AA ratio, would be my third choice in a perfect world. Earthworms my preference, as the lowest fat source of the three. As already established, its not a perfect world, earthworms don't work for me, but from a protein perspective, and a fiber perspective, I'd certainly view them as comparable to mealworms. Certainly more comparable than between certain grains or various seeds.
YMMV