
WOMERSLEY—MICROTROMBIDIINAE OF AUSTRALIA AND NEW GUINEA 323 
Adult ¢. Generally only differing in size. Length to 0:9 mm., width to 
0°62mm. Tarsus 1151p long by 86» high, T\/Tw = 1-75, metatarsus I 83, long, 
T,/M, =1-82. Otherwise as in female. 
Loc. Four females and three males from damp soil in typhus area, Good- 
enough Is., New Guinea, Aug., 1944 (D.C.S.). 

Fig. 18. Microtrombidium cordatum sp.n. A, Crista and eyes (X 200); B, palp (X 200) ; 
©, front tarsus and metatarsus of female (Xx 200); D, same of male (X 200); E, setae from 
middle of dorsum (X 860); F, seta from propodosoma (X 860). 
KEY T0 THE ABOVE SPECIES OF Microtrombidiwm s.str. 
1. Front tarsus more or less elongate, about twice or more than twice as long as high 2 
Front tarsus distinctly less than twice as long as high i ey, Pore: 
2. Front tarsus more than 3 times as long as high at « 23 Be 
Front tarsus about twice or to 2} times as long as high n.3 4, 
3. On external side % palpal tibia with two strong spines arising from near ; bysaninast of 
tarsus. T)/Ty 1, Ty/M; = 1-54. Dorsal setae uniform to 24, tapering with long 
setules phe zelandicum Wom. 1936. 
On external side of palpal tibia with only one spine, this short and stout, T)/Ty = 3-36. 
T,/M, = 1°67. Dorsal setae of two distinct sizes, ae and sch thick, with long setules, the 
longer setae appearing clavate or bushy .. myloriense sp. nov. 
4. No external spine on palpal tibia AIA +4 ws ke om eh 
One external spine of palpal tibia th -% pr) 10s 
5. Front tarsus only slightly longer than metatarsus, 1,/M; = = 1-27. Ty/Ty = 2-26. Dorsal 
setae uniform to 40y, slightly tapering, with long setules affine Hirst 1928, 
Front tarsus about 14 times as long as metatarsus, Ty My = 66, Ti/Ty = 2-22. Dorsal 
setae uniform, to 20u (near suture to 36), tapering with long setules 
goodenoughensis sp. nov. 
