


354 RECORDS OF THE S.A. MUSEUM 
SUMMARY. 
The subfamily Microtrombidiinae of the Trombidiidae, of Australia and 
New Guinea, is revised. The subfamily is restricted to those species in which 
the palpal tibiae are furnished with a strong apical claw, a smaller but stout 
accessory claw (absent in one species of Dromeothrombium), two pectines and 
with or without an external spine; the crista is linear with a subposterior sen- 
sillarv area, but without any anterior expanded nasus-like area. Sixteen adult 
genera are now recognized, the characters lying in the different distinct struc- 
tural groups into which the dorsal setae can be arranged, thus following the 
initial generic classifications of Berlese and Sig Thor. Of these 16 genera, eleven, 
of which five are new, are recognized from Australia, New Guinea and New Zea- 
land, Twenty-three new species are described, one as a variety of a European 
species. M. spinatum and M, tubbi are sunk as synonyms. Four of Canestrini’s 
New Guinea species furcipile, distinctum, securigerum and dentipile have been 
rediscovered and are redeseribed. Distinctum Canst. is shown not to be synony- 
mous with bipectinatum Tragardh from the Cameroons as stated by Berlese, 1912. 
The larva of a species of Camerotrombidium is described. The genera Neotrom- 
bidium Leonardi and Calothrombium Berl. placed by Sig Thor and others in this 
subfamily are removed. 
The genera and species recorded are as follows: 
Dromeothrombium queenslandiae nom. noy. for macropodum Wom. nee Berl. Queensland. 
Echinothrombium echidninum (Hirst) South Australia, 
Echinothrombium willungae (Hirst) South Australia. 
Echinothrombium bardonense sp. nov. Queensland. 
Echinothrombium lamingtonense sp. nov. Queensland. 
Spathulathrombiwm southcotti (Wom.) gen. nov. South Australia, 
Spathulathrombium maximum sp. nov. Tasmania. 
Spathulathrombium queenslandiae sp. nov. Queensland. 
Spathulathrombium fulgidum sp. nov. South Australia. 
Spathulathrombium myloriense sp. nov. South Australia. 
Microtrombidium zelandicum Wom. New Zealand. 
Microtrombidiwm maculatum Wom. Victoria. 
Microtrombidium karriensis Wom. South Australia, Tasmania. 
Microtrombidium hirsutum sp. nov, 8, Australia. 
Microtrombidium wellingtonense sp. nov. Tasmania. 
Microtrombidium papuanum sp. nov. New Guinea. 
Microtrombidium myloriense sp. nov. South Australia. 
Microtrombidium ef. furcipile (Canest.) New Guinea. 
Microtrombidium aequalis (Banks) Western Australia and South Australia. 
Microtrombidium affine Hirst Western Australia and South Australia. 
NMicrotrombidium newmani Wom. Western Australia. 
Microtrombidium adelaidicum Wom. South Australia, New South Wales and Queensland. 
Microtrombidium jabanicum Berl. New Guinea. 
Microtrombidiwm goodenoughensis sp. nov. New Guinea. 
Microtrombidium cordatum sp. nov. New Guinea. 
Camerotrombidium simile (Hirst). South Australia, New South Wales (adult, and larvae). 
Camerotrombidium collinum (Hirst) South Australia, 
Camerotrombidium wyandrae (Hirst). Queensland. 
Camerotrombidiwm opulentum sp. nov. South Australia. 
Camerotrombidium vaginatum sp. nov. South Australia. 
Camerotrombidium carduum sp. nov. Western Australia. 
Camerotrombidium rasum v. robensis nov. South Australia. 
Camerotrombidium distinctum (Canest). New Guinea. 
