66 R. W. CROSSKEY 
some lights. Sides of thorax purplish black or very dark brownish black with metallic areas 
coloured blue-green to purple-violet on upper sternopleuron and mesopleuron, the mesopleural 
metallic area largely covered by a bold white pollinose spot (conspicuous to naked eye) ; metallic 
areas of sternopleuron and mesopleuron often outlined with more violaceous colour than rest of 
metallic area. Thoracic hair (including suprasquamal ridge hair) entirely black. Wéngs. 
Basicosta black. Wing membrane clear hyaline (except for usual brown sub-basal area). 
First basal cell almost completely devoid of microtrichia. Calyptrae semi-translucent whitish, 
lower calypter at most only very faintly smoky, upper calypter not strikingly opaque white on 
basal part and therefore not very conspicuous to naked eye in side view; lower calypter with 
long dark erect hair on most of its surface (occasional specimen with hair confined to basal 
depression of lower calypter). Legs. Black with all black hair. Hind tibia with the ad fringe 
well developed and without pd setae. Abdomen. Ground colour blackish, purplish black or 
very dark tawny brownish with a pattern of golden green, light bluish green or slightly violaceous 
metallic areas arranged in spots or bands; black median vitta distinct to naked eye. T1 + 2 
with a long transverse metallic area, slightly diffuse on each side; T3 with a pair of submedian 
and a pair of lateral metallic spots, the submedian and lateral spot of each side sometimes nar- 
rowly or broadly coalesced so that each side of T3 has a metallic band; T4 with a pair of sub- 
median and a pair of lateral metallic spots which appear always to be well separated; T5 with a 
large metallic area on each side which is slightly excavate on its anterior margin so that the 
metallic area is slightly V-shaped or slightly lunate. All abdominal hair black, recumbent 
except on last tergite. Genitalia (Text-fig. 74): surstylus of very remarkable form, with a large 
sub-basal to submedian anteriorly and outwardly directed process and strongly excavate 
between this process and the apex, apical part as a whole strongly acuminate (the anterior 
process conspicuous in posterior view of hypopygium as well as in profile); cerci very slender 
on the apical third and this part very slightly sinuous, but actual apices of cerci not directed 
either forwards or backwards. Measurements. Body length about 11-5-15 mm, wing length 
about 12°5-15°5 mm. 
Q. Generally similar to ¢ but ground colour of abdomen more distinctly black and metallic 
areas of abdomen tending to be more coppery green. White pollinosity of mesonotum more 
conspicuous than in g and very conspicuous to naked eye between the black vittae of the pre- 
scutum and laterad of the sublateral vittae. No proclinate orbital setae. Vertex 0:27-0:29 
of head-width. Hind tibia with either one or two small pd setae. Probably averaging larger 
than ¢ (three speciments seen with body length about 15 mm). 
MATERIAL EXAMINED 
Holotype g, AUSTRALIA: South Australia, near Moonta, 16.ix.1904 (W. Wesche). 
In British Museum (Natural History), London. 
Paratypes. AUSTRALIA: 2 g, Victoria, Bright (HW. W. Davey). 1 g, Victoria 
(C. French). 13, New South Wales, Barrington Top, 13-17.xii.1g21 (G. Goldfinch). 
23,39, ‘Australia’ (no other data) (ex coll. Bigot). All paratypes in British Museum 
(Natural History). 
DISTRIBUTION. Known only from south-eastern Australia. 
AFFINITIES. R. (C.) cryptica sp. n. was in the past confused with R. (C.) splendida 
(Donovan) and R. (C.) decora to which it is certainly extremely closely allied. It has 
very similar or in some specimens identical metallic colour patterning to these species, 
but is distinguished from both of them (and from all other Rutiliini) by the quite 
exceptional shape of the surstyli (Text-fig. 74) mentioned in the description and the 
key; the surstylus shape is so characteristic that the species can be recognized 
immediately the male genitalia are examined. The shape of the apical part of the 
genital cerci also distinguishes cryptica from decora and splendida (in cryptica the 
