331 STUDIES IN AUSTRALIAN EMBIOPTERA. PART V: GEOGRAPHICAL VAUIATIOX IX ilKTOLIGOTOMA REDUCTA DAVIS. By CONSETT Davis, M.Sc, Lecturer in Biology, New England University College. (Thirteen Text-figures.) [Read 25th November, 1942.] Introduction. It has been noted (Davis, 1940, p. 156) that Metoligotoma reducta Davis occurs on the North Coast of Nevi^ South Wales, and that specimens from that region differ from typical specimens in structure. No attempt has been made previously to describe and name these northern variants, since a large hiatus in records — between Port Macquarie and Broken Bay — has rendered impossible a proper correlation of the structural variation with geographical distribution. A series of males was recently collected at Myall Lakes, approximately half-way between Port Macquarie and Broken Bay, and It is now possible to describe two new subspecies of M. reducta. The type subspecies, M. reducta reducta, was described (Davis, 1936, p. 248) from Eleanora, near Narrabeen, New South Wales. It was later re-described with narrower limits (Davis, 1938, p. 227, Figs. 1-4), the following additional localities being listed for specimens agreeing in detailed structure with the type series (Davis, 1938, Map 1): Sydney (Lindfield, Mosman, and Sydney University Grounds) ; Kurrajong Heights; Otford; and Hardy's Bay, Broken Bay. It has since been collected at National Park, not far north of the previous Otford record. The following points may be stressed from the previous description of the terminalia (Davis, 1938, Figs. 2-4) : The posterior process of the right hemitergite of the tenth abdominal segment in the male is short, obtuse, and directed inwards; the inner process of this hemitergite is smooth in outline; the process of the left hemitergite ends in a blunt and rather short expansion; the outline of the left cercus is smooth and approximately pyrlform in dorsal view; the structure usually referred to as the left cercus-basipodite is blunt, and is chitinized only distally and on the left. Metoligotoma reducta subtropica, n. subsp. Figs. 1-6. Holotype c^. Length 10 mm.; head 2-1 mm. x 1-8 mm. Colour as in the type subspecies, living specimens having the dorsal sclerites black to very dark brown, dull, the sternites dark brown, paler medially in the anterior abdominal region, the segments of the antennae and cerci light brown, those of the legs dark brown with obvious pale areas near the joints. Head outline as in the type subspecies; antennae 16-segmented, length 3-2 mm., apparently complete. Terminalia (Figs. 1-3) differing from the type subspecies in the posterior process of the right hemitergite, which is shorter and less incurved; the inner process of the right hemitergite, which has its antero-medial angle prolonged to a thin, obtuse lobe; the termination of the process of the left hemitergite, whose expanded portion is longer and thinner, and regularly ovate; the left cercus, which is less smooth in outline, having a blunt lobe on the inner face in the distal third; and the left cercus-basipodite, which is more slenderly tapered. Six other males were secured from the same colony as the holotype. The size limits are: Length 8-11 mm.; head 1-4-2-2 mm. x 1-1-1-9 mm.; antennae with up to 18 segments. In one of these, the terminalia are indistinguishable from the holotype; in two others, the terminalia differ from the holotype only in having the distal expansion of the process of the left hemitergite a little shorter; in the fourth, the terminalia agree
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