12 November 1949 The Queensland Naturalist 
the water. Search for them may be prolonged and ted- 
ious. involving pulling up the plant and washing its 
roots carefully in a white tray, when the larvae may 
become detached and swim about. It seems highly prob- 
able that larvae of T. linealis will be found on the 
roots of one or more of the common acquatic plants in 
the extensive swamps about Dunwich, but to date, search 
for them has been fruitless. This species offers scope 
for an interesting life-history study for which the Dun- 
wicb area appears particularly favourable. 
Anopheles amictus hilli, a potential vector of mal- 
aria. has been taken in large numbers at Myora; it can 
breed in either salt or fresh water and the location of 
its breeding places in this area would be a useful contri- 
bution from any future visitor. Anopheles hanctofti, 
Culex annulizostcis and Culex sitiens have also been col- 
lected at Dunwich. 
The above account is based on collections made at 
Dunwich at the end of November. 1943 and beginning 
of March. 1946. On 27th-28th September, 1947, 
adults of A. atratipes, A. vigilax and Culex sp. near cyl- 
indticus were taken biting. During the Naturalises’ Club 
Easter Excursion to the area. 26th-29th March, 1948, 
A. vigilax, Culex sp. near cylindricus and T. linealis 
were the only adults collected, the latter two being scarce. 
A. notoscciptus was breeding in a fallen palm frond in a 
deserted garden. On 21st-22nd August, 1948, only 
two anopheline adults were observed. On none of 
these occasions could larvae be found in the Two-Mile 
Scrub, though water was present. 
ORCHIDS NOTED AT DUNWICH, EASTER, 1948 
By TREVOR E. HUNT 
The type of open forest country occupying the 
bulk of Stradbroke Island is not generally rich in epi- 
phytic types, and at this time of the year very few of 
the terrestrials are above ground. Mr. Dunn and I 
searched the area as thoroughly as possible in the time 
available, and found only about a dozen species from 
eleven genera. The only epiphyte encountered was Den- 
diohium linguiforme. It was seen only once, on two 
trees a couple of miles south of the settlement. One 
