Corixids are aquatic Hemiptera, better known as water boatman, they are a great source of food to the fish, this is my favorite pattern. ~ Xavier
Hook: Wet/nymph #12.
Body: Yellow Latex .
Shellback: Natural Latex colored.
Eyes: Burnt mono.
Legs: Hackle stems with the tip fibers left in place.
Thorax: Yellow dubbing.
Head: Yellow dubbing
Step 1: Attach thread and make a nice bed on the front of the hook and tie in the eyes with figure 8 wraps.
Step 2: Cut a 1/8" Wide strip of natural latex and form a "V" on the tip and tie it in.
Step 3: Cut a similar width yellow latex strip point to 45º and tie it in.
Step 4: Attach some lead wire to build up the body and secure it.
Step 5 & 6: Make a football shaped under body with yellow thread or floss.
Step 7: Create the body with even wraps of the latex, make sure you cover half of the previous turn every time.
Step 8: Attach the hackle stems for the legs, tie them exactly to the side of the body for a better finish.
Step 9: Pull the natural latex to the front and tie it in just where you finished the abdominal segments.
Very tight lines. ~ Xavier