NEW SPECIES OF BRISTLETAILS OF THE FAMILY MACHILIDAE (MICROCORYPHIA) FROM TAJIKISTAN

Two new species from the bristletai family Machilidae are described from Tajikistan, Central Asia: Allopsontus sogdianus sp. n. and Silvestrichilis perfectus sp. n. Allopsontus sogdianus sp. n. seems to be particularly similar to A. pulchellus (Kaplin 1982), a species of the subgenus Anisopsontus from the Dzhungarsky Alatau Mountains, southeastern Kazakhstan, as their males share many small, dark, specialized bristles on the ventral surface of articles 2–7 of the maxillary palps. Allopsontus sogdianus sp. n. differs from A. pulchellus by the length of the body, the structure of the antennae, the number of articles in the distal parts of the antennae, the color and structure of the eyes and paired ocelli, the maxillary palps, the sensory field on the femora of the male forelegs, the relative length of the styli on the males and females urites VIII and IX, the number of articles of the ovipositor and male parameres. Males of Silvestrichilis perfectus sp. n. are with 4–5 almost vertical, thickened, needle-like bristles on the second articles of the fore, middle and hind tarsi, this being one of the main morphological features of this genus. Silvestrichilis perfectus sp. n. differs from other species of the genus first of all by the presence of sensory fields on the fore and middle femora of males.