SEPTEMBER, 1909. ] THE ORCHID REVIEW. 281 
whitish lines, and the petals heavily blotched with red-purple on a white 
ground. The lip is pandurately three-lobed, with a very broad nearly 
circular front lobe, and the ground colour is white, blotched with red-purple, 
except at the margin, and there is a transverse band of similar colour in 
front of the crest. The latter is broad, concave, and extends in a pair of 
prominent truncate keels infront. The column is white, with purple spots 
behind, and very broad, denticulate, almost hatchet-shaped wings. It is a 
handsome acquisition. i 
THRIPS. 
Wuat is the best remedy for the red thrip affecting Cypripediums? This 
has been introduced to Australia on plants imported from England, and 
in Brisbane it has almost destroyed some collections of Cypripediums. 
They grow them in a bush or shade house which cannot be fumigated. My 
experience is that with constant fumigation, and growing the plants in a 
cool airy place, with constant spraying overhead, I can reduce the thrips 
to a minimum, but I am not certain if I have exterminated them. They 
have not spread to any other plants. 
I was in England a year ago, and when visiting Kew Gardens I was 
informed by one of the young gardeners attending to the Orchid houses, that 
they regularly used some weak insecticide when spraying the plants, which 
kept all scale and thrips down. If this is so could you give the name or 
formula of the insecticide used, and the proper strength ? 
The Orchid Stud-Book is very complete, and such a book was badly 
wanted. It is to be hoped that it will become the authority regularly used 
by all growers. ARTHUR YATES. 
Sidney, New South Wales. 
By a singular coincidence the last issue of the Kew Bulletin contains an 
account of the the thrips found at Kew by Mr. Richard S. Bagnall, a 
summary of which will be generally interesting to Orchid growers. It 
occurs in a paper entitled “ Additions to the Wild Fauna and Flora of the 
Royal Botanic Gardens, Kew.” Under the heading Thysanoptera, Mr. 
Bagnall writes (p. 254) :— 
‘“‘Until recently only three species of thrips were recorded from European 
greenhouses, namely, Heliothrips hemorrhoidalis, Bouché; H. femoralis, 
Reuter, and Parthenothrips dracene, Heeger. In 1904, however, Prof. 
Reuter described Leucothrips nigripennis, from hothouses, Helsingfors, 
Finland, found on species of Pteris; and in 1g07 Mr. Dudley Moulton, 
described Euthrips orchidii, from four specimens found on Orchids in a 
hothouse, California, U.S.A. The writer has taken both Leucothrips 
nigripennis, Reuter, and Euthrips orchidii, Moulton, in the houses of the 
