408 ' NOTES AND EXHIBITS. 



Mr. W. W. Froggatt exhibited a new aphid that has infested the native 

 cypress over an area of about 100 miles from Dubbo to Condobolin, and appears 

 to have killed many large trees. They were first reported about two months 

 ago and simply smothered the branehlets and main branches of the trees. Since 

 then they have been cleared from many of the large trees by the red and black 

 spotted ladybird beetle (Leis conformis) which has appeared in very large num- 

 bers. If the latter continue to increase they will probably save all the smaller 

 trees on to which the aphis ai'e now crawling from the larger trees that were 

 the first to be attacked. 



Mr. A. N. Burns exhibited specimens of Argynnina hobartia cijrila from 

 Narrabeen and Ferntree Gully, Victoria. The specimens from Nanabeen are 

 much larger and rather darker than the Victorian examples. It is remarkable 

 that this species should occur so near the coast at sea level, being an inland 

 mountain species in Victoria. It appeared to be more abundant at Narrabeen 

 than in its Victorian haunts. 



Mr. W. F. Blakely exhibited from the National Herbarium the following 

 species of Pterostylis with the labellum emarginate or bifid which is contrary to 

 the normal form. (1). P. obtusa R. Br., Hobson's Bay, Victoria (C. Walter, 

 July- Aug., 1896). The cleft labellum somewhat resembles P. concinna R. Br., 

 but it is more contracted towards the top, with a broad band commencing at the 

 junction of the lobes and gradually diminishing downwards; lobes | mm. long. 

 (2). P. nutans R. Br., Batlow (R. B. Timmis, Nov., 1910); Mt. Lofty Ranges 

 (ex Herbario C. E. Menzel, Sept., 1897). The labellum is somewhat similar to 

 that of P. obtrisa but the lobes are barely J mm. long. These two forms ap- 

 proach P. nutans R. Br., var. hispidula Fitz. (3). P. reflexa R. Br., Mittagong 

 (W. Greenwood, No. 706, Feb., 1916). Liabellum linear, abruptly expanded at 

 the top into two obtuse lobes about 1.5 mm. long, the two lobes spreading to a 

 little over 3 mm., while the labellum just below them is scarcely 1 mm. broad. 



