There is no difference between a mosquito (little fly) and a gnat, both names are applied indiscriminately to thin-bodied Diptera of the group Nemocera which attack man; only the females bite (see Vol. VI. pp. 466-468).
Regarded by Schaudinn as a state of the Flagellate Trypanosoma (p. [119] f.).
In Quart. Journ. Micr. Sci. xliv. 1901, p. 429.
It would seem that resting-cells, i.e. the crescents and corresponding spheres, of Laverania and Haemamoeba may linger during months of apparent health in the spleen and red marrow of the bones; and that these by parthenogenesis produce sporozoites and determine relapses when, owing to a lowering of the general health, conditions favourable to new sporulation occur.
Léger and Duboscq have found that Sarcocystis tenella, a parasite common in the muscles of the sheep (and rarely found in man), has a conjugation and sexual process recalling that of Stylorhynchus, save that the sperms are much smaller than the ova (C.R. 1902, i. p. 1148).