1968 ] 
lilies — Wingless Stone fly 
329 
DESCRIPTION 
Leptoperla darlingtoni nov. spec. 
Measurements : (in mm.) 
Body length 
Antenna 
Cercus 
cf 
6 
8 
2.5 
$ 
12 
8 
3 
General color: Brown with dark markings on pronotum and lighter 
patches on meso- and metanota. 1 Head : Frons uniform brown. 
Ocelli visible. Eyes bulged forward. Epicranium mottled in brown 
and darker brown. Antennae with very fine covering hairs. Prono- 
tum: Almost square with angles slightly rounded. Meso- and meta- 
nota: Wing vestiges present as small flaps which are without vena- 
tion and slightly project posteriorly past hind margins of their re- 
spective nota. Legs: Brown with slightly lighter color on middle 
of femora and tibiae. Abdomen: Uniform brown. Tergites of male 
chitinised overall; those of female fully chitinised in tergites I, VIII, 
IX and X but II-VII chitinised only medially. Male genitalia: Ter- 
gite X trapezoid with tergite XI projecting from its posterior 
margin in form of a narrow cone. Epiproct tapered to small down- 
turned tip; ventral keel present and dorsal margins each with 3 or 
4 teeth. Paraprocts taper to down-curved apices. Subgenital plate 
with medial notch on posterior margin. Female genitalia: Subanal 
lobes almost triangular with wide bases. Subgenital plate produced 
to form two lobes either side of a medial notch. Tergite X with 
triangular hind margin, its apical angle obtuse. 
material : Holotype cf and allotype 9 > Paratypes 7 cf cf and 3 
99 Mt. Donna Buang, Victoria, 6-7 /xii/1931, P. J. Darlington. 
( 1 cf 1 9 paratype pinned, the remaining specimens relaxed and in 
alcohol). Coll. VIus. Comp. Zool. Harvard University. 
AFFINITIES 
The new species, judging from the genitalia, belongs within the 
group of Australian Leptoperlinae which in the present system 
(lilies 1966) is harboured in the genus Leptoperla. In a recent re- 
vision of Australian gripopterygids, studying the abundant material 
of my collection from Australia and Tasmania in 1966, I. McLellan 
has split the Leptoperla - Complex into several well characterized new 
genera. After the publication of his results, L. darlingtoni nov. spec, 
will find its definite place in one of these new genera. It appears to be 
closely related to L. rugosa Kimmins from East Australia (N.S.W.). 
ECOLOGY 
The mountain of Donna Buang, Vic., has one of the typical high- 
alpine grassland sites almost above the timber-line, where such wing- 
less forms could be expected (judging from New Zealand and 
