Kevisiox of the E-Mbiofteka of Western Australia. 
141 
for the actual colonies may reveal wingless forms of the adult male in species 
where at present the winged form alone is known, or even new species entirely 
v^ingless in all stages, such as in the Eastern Australian genus Metoligotoma. 
SYSTEMATIC^. 
Family OLIGOTOMIDAE Enderlein 1909. 
Zool. Anz., 35, p. 190. Type genus, Oligotoma Westwood, 1837, Trans. Linn. 
Soc. London, Zool., 17, p. 373. 
In addition to the type genus, whose diagnosis is given below, this family 
includes only the genus Haploembia Verhoeff (Shores of Mediterranean and 
Black Seas), which differs from Oligotoma in having the males always, instead 
of exceptionally, wingless, and in the presence in both sexes of a medial bladder 
or vesicle on the plantar surface of the first segment of the hind tarsus. 
Genus OLIGOTOMA "Westwood 1837. 
Loc. cit. (as subgenus of Embia Latreille, 1829). Raised to generic rank, Bur- 
meister, 1839, Handbuch der Entomologie, Bd, 2, p, 770. 
Males winged (more rarely, winged and wingless forms occur within the 
same species), R4+5, M, and Cui„ simple and subobsolescent (each represented by 
little more than a median row of macrotrichia in a broad band of pigment, Plate 
] , Fig. 1) ; tenth abdominal tergite partly divided to hemitergites, the cleft not 
extending forward to the ninth tergite ; right hemitergite with outer margin 
produced back as a slender sclerotized lobe, basally overlying an inner mem- 
braneous flap, the latter sclerotized only medially, this sclerotization con- 
tinuous with that of the outer process. Left hemitergite with a prominent 
process, sometimes complex. First segment of left cercus subcylindrical 
to clavate but never echinulate ; second segment, and both segments of right 
cercus, elongate-subcylindrical and distinct. Structures at the base of the 
left cercus, conventionally referred to as the left cercus-basipodite, often 
complex, and probably always including elements of the left half of the tenth 
sternite of the larva. 
Both sexes with plantar surface of first segment of hind tarsus carrying only 
the terminal l)ladder, remainder of surface carrying many stiff setae (Plate 
L, fig. 2). 
The genus is indigenous in the warmer parts of Asia, throughout Australia, 
in the islands between Asia and Australia, and islands in the Indian Ocean. 
It is now tropicopolitan, spread by man. 
Oligotoma glauerti Tillyard, 1923 (Plate I., figs. 5-7). 
Journ. Froc. Boy. Soc. West Aust., 9, 1, p. 64. Re-described from type series, 
Davis, 1936, p. 242, Plate I., figs. 6, 13, 20, 27, and 34. 
Length 9.5-10.0 mm. ; head 1.4-1. 5 mm,, x 1.1 mm. ; forewing 8.2 mm,, 
X 2.2 mm. ; hindwing 7.5 mm., x 2.2 mm. Colour mid-brown, eyes black, 
wings with veins or their traces bordered by pale-brown bands. Head rounded 
behind ; eyes subreniform ; antennae with up to 21 segments, maximum 
total length 7.5 mm. ; mandibles (Plate I., fig. 7) slender, left with three 
thin inwardly-directed teetli terminally and subterminally, right with two ; 
inner margin of loft mandible with a median dorsi-ventrally flattened cutting 
edge. Thorax, including wings and legs, normal for the genus. Terminalia 
(Plato I., fig 5) with outer process of right hemitergite ending in two closely- 
approximated subacute teeth ; process of left hemitergite (Plate I., fig. 6) 
ending in an anchor-shaped hooklot. First segment of left cercus irregularly 
