Fly Patterns - Jose Mosca Negra

Jose Mosca Negra



Any good, sturdy saltwater hook with a short shank and ring eye 2/0-4/0


White 210 denier flat nylon


White buck-tail

Interior Flash:

Pearl fine flashabou or crystal flash


Silver 3-D stick-on eyes size 4.5”


Black bucktail


Five minute epoxy


Jose guided Karl Wolff and me this last November for four fishing days  in La Paz, Baja California Sur. I wrote an article for this month’s issue on that trip, so I won’t repeat myself here on how we fared. When it came time for bluewater tuna fishing, Jose said something like “mosca negra?” after looking through my fly boxes. “You mean ‘black fly,’ right?” was my lame reply. He grinned and nodded affirmatively. So I scratched around—unsuccessfully—in my gear for awhile as he watched patiently. He then produced a trashed black-on-top, white-on-bottom fly and had me tie it on. It worked but I lost it, and we had no more.


The next day he produced a couple more that he said were tied by his brother. They were gorgeous. He declined my offer to buy them, handing me one to tie on. I did manage to talk him out of one of them on the last day so that I would have a sample to copy. Here, for your benefit, is the fly I now call “Jose’s Mosca Negra.” Ron and Jeanne will correct my Spanish if I’ve blown it.

Tying Instructions

1. Cover the hook with thread back to the point of the barb—no further.


2. Bring thread forward to about 1/8” behind the eye. Cut and clean a pencil-size bunch of white bucktail. This bunch must be long enough to extend about 2 shank lengths to the rear of the hook bend. Turn the vise so that the underside of the hook is up, and tie this first bunch on, holding it so that it does not roll around the hook.


3. Tie in a slightly shorter bunch immediately on top of the first bunch. Repeat this step with a third bunch, again slightly shorter. This will taper the body to resemble a baitfish.

Bucktail on bottom





4. Turn the vise upright and tie in the flash; it should extend slightly beyond the longest bucktail tips. Keep the flash relatively sparse, as it is supposed to represent a lateral line.








Flash added on top


5. Tie in two bunches of white bucktail on top of the flash, with the second bunch being slightly shorter than the first.


Bucktail added on top


6. Tie in a half-pencil bunch of black bucktail on top of the last two bunches of white.


Black bucktail added on top


7. Begin shaping the fly head with your thread; it should end up to be a bullet shape tapering to the eye. See “Tying Tips” at the end of this article.

8. Mix a small amount of five-minute epoxy on a sheet of stick-on note paper. Holding the fly in your hand, cover the head with epoxy, turning the fly in your fingers as you work it around the head.

9. Once the epoxy has set but is still tacky, put the fly back in the vise and place the stick-on eyes on either side of the head. Make sure that they are even vertically and horizontally.

First coat epoxy and eyes added


10. Coat the head and eyes with a second coat of epoxy, allowing it to flow evenly around and over the eyes.


Completed fly with second coat epoxy

Tying Tips

1. As you add bucktail to the head of the fly, pay attention to the shape of the head. Don’t blunt-cut the butts; cut on a taper so that when you finally shape the head you won’t have a “step” effect that will make it impossible to create a smooth head.


2. Stir the epoxy with a needle or a glass cocktail stirrer. Toothpicks seem to cause excess bubbles in the mixture.



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