
WoMERSLEY— MICROTROMBIDISNAR OF AUSTRALIA AND NEW Guinea 301 
of vather different form and do wot constitute the major portion of the dorsal 
clothing, The larger setae do not reach the lengths of those found in echtdeanum 
and they ave all distinetly ciliated or setulate, Tntermediate sizes also aceur, 
The following redeseription is drawn from # speeimen [rom Rivervale, South 
Australia. In the dimensions of the front tarsi and metatarsi the extremes and 
average of nine specimens are given: 
Redeseription, Length to 2-1 mim., width across shoulders ta 1-275 mm, 
Shape as in eehidninum, Legs shorter than body, T 1275p, [7 9280p, TIT 9465p, TV 
125; tarsi | 292-315. (aver, 308.) long, 101-1380y, (aver. 120.) wide, metatarsi 
1182-210, (aver, 201) long. Byes 2 + 2, sessile, well away from erista and in 
advance of sensillary area. Crista as figured, 480, long, with sensillary area at 
about % from apex, sensillae ca, 120, long, apparently nude and with bases 34) 
apart. Chelae with inner edge serrate, Palpi as fared, tarsus elongate but not 
over-reaching tip of palpal elaasy, tibia with one lone slender external spine well 
separated from base of claw. 
Dorsim thickly covered with spine-like setae: generally of two distinet lengths, 
but with some intermediate; all with distinct ciliations or setulations except at the 
tips which are pointed and more chitinized ; short setae 35-45, lone, longer setae bo 
150. lone. 
Loc. Wirst's type was from Willunga, South Australia, Oct, 1929. T have 
further specimens from the following South Australian localities: Glen Osmond. 
Oct. 1933, Long Gully, May 1984, Mt. Osmond and Mt. Lofty. June 1934, Barn- 
side, Aug, 19384, Rivervale, April 1934, Belair, May 1935 and March 1938, 
All the above specimens in possessing three paivs of genital dises ave adull anid 
probahly all females. Two other specimens, one from Mt. Lofty, 8. Aust., Time 
1954, and one from Fern Tree Gully, Vietoria, Jan, 1937 agree in the nature of 
the dorsal setae but are considerably smaller in size and dimensions of front tarsi 
and metatarsi and erista, etc,, as follows : 
From Mt. Lofty. 
Length 6754, width 420y. Lees 16754, 17 470p, TIT 440n, LY 675; tarsus 1 
186y. by 86, metatarsus 1105. Crista 195, long. Sensillae ea. 1304 long and 
bases 234 apart. Dorsal setae 30—40u and to 100,, 
From Fern Tree Gully: 
Length 675p, width 450, Legs T 660p, TT 420p ea,, TTT 450", TY 600.; tarsus 
T 189 by 90u, metatarsus 11104. Crista 1902 long. Sensillae ca. 126) lone and 
bases 24, apart. Dorsal setae 30-10 and to 110p. 
Despite the differences in the relative preportions of the tarsal dimensions, 
which might only be sexual, these specimens must, T helieve, be recarded as males. 
Tn having three pairs of eenital dises they are adults. 
ECiiNOTHIMOMIMIIEM RARDONTNEH sp, Nov, 
Fig. 4 A-D. 
Degeription. Colour red, Shape roughly elliptical with maderalcly prominent 
shoulders. Length to 2-025 mm,, width to 1-275 mm, Legs fairly stout, T 2100), 
long, TT 18A0p, TIT 1275p, TY 2250u: tarsi T elliptiea! 450p long by 210u high, meta- 
tarsi T380p long. Crista linear ax firured, 380» long, with subposterior sensillary 
area, sensillae ? length, hases 386u apart. Eves 2+ 2, on cistinet subsessile ocular 
shields, Palpi as figured, tibia with one slender external spine. tarsus rather 
elliptical, reaching tip of tibial claw. Dorgal setae of two kinds and lengths, the 
smaller pointed, rod-like, 40-55y long, with distinct ciliations; the larger spine- 
like, to ae lone, with strongly chitinized and pigmented pointed tips, apparently 
ite ned, 
