Abstract
Melophagus ovinus (L.), the sheep ked, when fed on a mouse ear, is a vessel feeder (solenophage). The haustellum of the ked penetrated the skin through the stratum corneum by rapid eversion of the prestomal teeth reinforced by pressure on the haustellum. It probed the subepidermal tissue with a reciprocating motion, accompanied by continuous activity of the prestomal teeth. When the labella contacted a venule of 30–100 μ, they immediately penetrated it, the prestomal teeth everted and anchored the labella to the vessel wall. Sucking of blood followed immediately and engorgement was complete within 5–10 minutes. Bursts of saliva were seen entering the vessel four or five times during engorgement. Sheep skin biopsy material containing the haustellum indicated that the ked fed from venules near the level of the apocrine glands and bases of wool follicles. Previous work is discussed in relation to these results.
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