Kkxisiox of the Embiopteija of Western Austraeia, 
14 
Locality: Ereinantle, 20~23/v/35, coli. K. K. Norris (liolotype and 
paratypo (J, Macleay Musouin). 
Note, — The three foro^going species ar(‘ [)robal)ly tlie most ljighly*specialis(>d 
in tlie genus, agreeing well with the concept tluit greater structural cliang<‘ 
is to be expected in those descendants which have migrated furthest frojn 
the ancestral region. They may later bo separated as two distinct sul)g(m(T’a, 
one containing O. (ikiuerti, the second tlu* otlu'r two species. 
Oligotoma gurneyi spinulosa l)a\'is. 193(i (Plato b, fi^s. U Iti). 
Op. cit., p. 239, Fig. 3. 
^ Jjcngth 8. 7-13. S mm. ; head 1.7-2. 3 mm,, x 1.4 2.0 mm. ; fort'wing 
7.0-10.0 mm., x 1.6--2.5mm. ; hindwing 0.0-9. 0 mm., x 1.7-2. 5 mm. Colour 
as in O. glauerti or somewhat darker. Head as in preceding species, eyes 
prominent ; antennae with up to 20 segments, maximum total length 4.2 mm. ; 
mandibles (Plate I., fig. 10) essentially as in the ])receding species except for 
the presence of a marked excavation in the ])roximal half of the inner margin. 
Thorax including wings and legs normal for the genus. Terminalia (Plate 
I., fig. 14) with outer process of right hemitergite terminating in two a]>j>roxi- 
mated subacute teeth, the outer one slightly incurv(xl ; process of left hemi- 
tergitc (Plate I., fig. 15) slender, sinuous, with a slender acute terminal spine 
directed forward and to the left. First segment of left cercus with a blunt 
subterminal inward projection, the inner margin basad to this sliglitly and 
smoothly concave. (This structure is distorted in tlu^ slid(5 mount of the 
holotype, Plate I., fig. 14 ; for natural structure see Davis, 1936, Fig. 3, LCi.) 
Ninth abdominal sternite tapered posteriorly and terminally smoothly I’ounded, 
right-hand margin sinuous. Left cercus-basipodite intimately fused to the 
left-hand margin of the ninth sternite, subterminally ])roduced to the left as a 
sharp spine. Terminalia otherwise as throughout the genus. 
9 See belowx 
Localities: Morgan’s, near Mt. Margaret, x/33 (holotype Macleay 
Museum ; paratype W.A. Museum, etc.) ; Lake Violet, East Murchison 
District, x /27 (1 c^) ; Geraldton (1 cj) ; and the following new records : Belele 
Station, Murchison (3 ; Annean Station, near Nannine, Murchison (8 
in association with 1 of 0. tillyaxdi, and a female, length 14 mm., colour 
dark red-brown, and therefore j^robably referable to 0. gurmeyi spimdosa 
but larviform and with no apparent specific characters). 
Oligotoma gurneyi Frogg. 1904, subsp. ? 
A single male from Lalla Rookh Station, North-West Australia (W.A. 
Museum ; cf. Davis, 1940, p. 159, Figs. 5-6) is intermediate between O, gurneyi 
spinulosa, and subspecies occupying a more' easterly and northerly range 
(O. gurneyi suhclavata Davis 1936, op. cit., p. 240, Fig. 4 : North Australia ; 
and O. gurneyi centralis Davis 193(>, op. cit., p. 237, Fig. 2 : Central Australia), 
A male from Hermannsburg, Central Australia (Davis, 1940a, p. 157, Fig. 7) 
is barely distinguishable fi’om the Lalla Rookh example, so that this series 
may have a wide range, and deserve subspc^cific nomenclature. The first 
segment of the left cercus is only barely clavate, as in O. gw'ueyi s'ubclavata ; 
the left cercus-basipodite is blunt and more or less \ipcurved, suggestive of 
0. gurneyi centralis. The processes of the hemitergites, however, agree most 
closely with 0. gurneyi spinulosa. 
Further specimens are required, especially (1) from localities between 
the range of O. gurneyi spmtdosa (supra) and the localities Lalla Rookh and 
