
WoOMERSLEY—MICROTROMBIDIINAE OF AUSTRALIA AND NEW GUINEA 337 
In deseribing a specimen from Buru, Oudemans in Trenbia (loc. cit.) also 
shows that Tragirdh’s bipectinatum trom the Cameroons is not the same as 
distinctum of Canestrini from New Guinea, as stated by Berlese (1912). Oudemans’ 
specimen was an old and well developed female and measured 3-777 mm. in length, 
His details and figures agree well with those given in the above description. 
The species described by Boshell and Kerr, 1942, from Columbia under the 
name of Microtrombidium arborealis, but which is here considered a Canerotram- 
bidiwm, has also the peculiar palmate setae on the fourth legs and is therefore 
closely related to Trigiirdh’s bipectinatum and to distinetum of Canestrini. 

Fig, 27. Holevtrombidium securigerum (Canest), A, Crista and eyes (X 200); B, palp 
(x 200); C, front targus and metatarsus (% 200); D, BH, F, larger dorsal setae from above, 
below and side respectively (> 860); G and H, smaller dorsal setae ( 860); I, leg seta 
(x 860). 
Genus HoLcorrompipium nov. 
Microtrombidiinae in which the dorsal setae are uniform or if of two sizes or 
forms then the larger ones, decumbent and somewhat seale-like, with their lateral 
edges curved under to form a channel or helmet-like structure. 
Genotype Ollonia serurigera Canest. 
