
328 RECORDS OF THE S.A, MUSEUM 
loc. Type material (in 8. Aust. Museum) from Belair, 8. Aust., Jan. 1, 
1928 (S. Hirst); other specimens from South Australia: Sou’-West River, 
Kangaroo Is., Dec., 1934 (I.W.), (3 spec.) ; Wood’s Point, May, 19385 (H.W.), 
(1 spec.) ; Mt. Gambier, Jan., 1941 (J.8.W.), (1 spec.) ; Coorong, April, 1943 
(H.W.), (a number); Robe, Oct., 1943 (H.W.), (1 spec.). New South Wales: 
Myali Lakes, Sept., 1922 (A, Musgrave), (1 spec.). 
Remarks. The specimen from New South Wales was amongst the Hirst 
material left in Adelaide and was that from whieh C. harsti (Wom., 1934) was 
described. I am now satisfied, however, that the specimen does not differ essen- 
tially from typical simile Hirst. 
Description of Larvae. Fig. 20 A-E. Colour in life reddish. Shape 
rather ovoid, tapering posteriorly and apex incised, higher than wide. Length to 
300u, width to 165. Legs shorter than body, I 270u, Il 225, IIT 240n. Dorsally 
with two anterior median scuta, the anterior very large, 184p long by 128,» wide, 
longitudinally striated, occupying nearly the whole width of dorsum and extend- 
ing backwards to level of beiween first and second coxae, anteriorly it, overlaps 
on to the venter and this portion has the longitudinal striae much wider apart 
(cf, Fig. 20 A-B) ; this scutum has 3 pairs of short stout setae, 32-40 long and 
ciliated, as well as a pair of long filamentous sensillae, 72» long, and with bases 
1054 apart; the second scutum is transverse, as wide as the first, but only 34. 
long, with two setae, 40. long, and ciliated. Eyes 2+-2, the anterior eyes on a 
level with sensillae. Behind the second anterior scutum are four strong ciliated 
setae, about 50» long, set in the centre of small pitted oval plates, these are 
followed by about 16 setae of which the last pair are 80» long. Mandibles long, 
with the chelae as in Fig. 20 D. Palpi apparently 4-segmented, stout, tarsus short 
and rounded with 3 long and 1 short simple setae, tibia with curved hook-like 
elaw, which appears almost bifureate. The oral opening is circular, formed of a 
pair of semicircular lobes set with teeth (in the figure 20 B, the lobes have become 
displaced and only one is seen). Ventrally, enathosoma with a pair of short stout 
fimbriated setae, coxae I and LI forming two lateral groups, separated in medial 
line, IIT practically touching medially, | with two pairs of short ciliated, tapering 
setae, IL and IIT with 1 pair; no setae between coxae I or II, but a pair of short 
setae between coxae II] at anterior corners. Tarsi and claws of legs I and II normal, 
those of ITI with the outer claw deformed as in Fig. 20 E. 
Loc. Several larvae were found during Oct. 1943 in a tube in which an adult, 
collected from the Coorong, 8. Aust., April, 1948, had been confined with a small 
amount of sterilized soil. No eggs were seen. Two specimens were mounted. 
Remarks. In the form of the mouth parts, dorsal scuta and the third tarsus 
this species agrees with those placed by Oudemans (1912) as of the genus Throm- 
bidium Fabr., 1775. Of the species so placed by Oudemans, however, none are 
known from the adult forms, and indeed he states on p. 112, that they are only 
provisionally placed in Thrombidiwm, 
Tn the two species, which Oudemans figures, viz. demeiicret Ouds. and africa- 
num Ouds. the third pair of coxae are distinctly and widely separated, Assum- 
ing this difference to be valid the larval generic diagnosis of Camerotrombidiunn 
may be stated as follows: 
Trombidiidae with the characteristic pseudostigmal opening between coxae I 
and 11. Hyes 2+2. Two median dorsal scutum, anterior with 3 pairs of setae 
and 1 pair of sensillae, anteriorly overlapping on to venter ; posterior with 2 setae ; 
both longitudinally striated. Coxae I and II touching, separated in medial line, 
III touching more or less completely in median line. Oral opening circular, Pal- 
pal tibia with hook-like claw. Outer claw of tarsus III deformed, 
