Dr. Murai Éva szerk.: Parasitologia Hungarica 20. (Budapest, 1987)

Fig. 23: A tearing line left the exact print of a prestomal tooth on the surface of the epithelium (1 500 x). Fig. 24: The labella of Musca domestica in a filtering position in anterior view (Ps: pseudotracheal rows) (150 x). Fig. 25: Pseudotracheal rows have an annular structure (2 600 x). Fig. 26: Pseudotracheal rows (Ps) in dorsal view. One end of an incomplete ring has. the shape of a fish-tail (H), the other end forms a wish-bone (V) (K: chitinous plates leaning to the surface). The pseudotracheal rows are as far open as possible, which permits filtering of low efficacy only (2 000 x). Fig. 27: Pseudotracheal rows (Ps) in dorsal view (V: wish-bone end, K: chitinous plates leaning to the surface) (2 000 x). Fig. 28: Chitinous plates (K) leaning out of the pseudotracheal rows, and their articular connection (Kc). The plates leave open small spaces for filtering (10 000 x). Fig. 29: Pseudotracheal rows with filtering fissures reduced to a minimum (1 100 x). Fig. 30: The surface of a tissue-culture is abraded by a sucking of a house fly. The remains of cells and nuclei are still discernible, the distinct contour of cells is blurred (1 000 x). Fig. 31: A diagramm of longitudinal sections of the labella (1= resting position; II-VI = feeding positions; 11= filtering position, 111= cupping position, IV= intermediate position, V= scraping position, VI= sucking position). From Graham-Smith, 1930 and Greenberg, 1973. Fig. 32: A schematic lateral view (contour) of the prestomal teeth of: a) Musca autumnalis, b) Musca domestica, c) Musca osiris (drawn from SEM pictures). Fig. 33: Filtering fissures and structure of the chitinous skeleton of the pseudotracheae based on light-microscopic studies: a) dorsal view; b) alternating relationships of the extremities of the pseudotracheal rings; c)interbifid space of a pseudotracheal ring in a lateral view. From McAlpine, 1981. Fig. 34: A schematic view of: a) the cross-section of pseudotracheae; b) the structures of pseudotracheae seen from the external surface, based on SEM pictures (H = fishtail end, V= wish-bone end, K= chitinous plate, Kc= articular connection of chitinous plates).