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Third-stage larva of Thelazia callipaeda at the dissection of the proboscis of Phortica variegata on day 21 dpi in the square box—a detail at higher magnification of the anterior part of the larvae with a delicate transversally striated cuticle and buccal opening bearing a buccal capsule resembling a vase-shaped and a well-developed digestive tract. This figure appears in color at www.ajtmh.org.
