DESUKIPTIONS OF AUSTRALIAN ^ESCHNIN^. 43 



in Asia Minor, while C. conspersa is confined to New South Wales, led me to 

 compare the two insects care£ullj_, wlien important difterences at once became 

 apparent. As to the question whether the other species described by Martin 

 under Calicesclma, and occurring in various parts o£ India and the East 

 Indies, are also congeneric with the type, I am unable to give a definite 

 answer for lack o£ the necessary material. The chief differences between 

 Caliceschna, Selys, and DendrocescJma, n. g., are as follows : — 



1. In Calicesclma the e3''es are " pen contigus.'" In TJendroa;schna, on the 

 contrary, they are very contiguous and large, almost obliterating the post- 

 orbital triangle. 



2. The remarkable form of the front in DendrocescJma, with the consequent 

 closeness of the three ocelli together, the obliteration, almost, of the vertical 

 tubercle, and the wide separation of the antennce, is far more specialized than 

 any tendency in the same direction observable in Calicesclma. 



3. In Caliceschna the nodus lies about halfway between base and ptero- 

 stigma in fore-wing, nearer to the base in hind-wing. In De?ulroceschna the 

 nodus lies distally from the middle in both wings. 



4. In Calicesclma the pterostigma is not braced ; in Dendrocesclma it is 

 very strongly braced. 



Dendeo^schna conspersa, Tilli/ard, n. sp. (Plate 4. fig. 5.) 



Calicesclma conspersa, Tillyard, Proc. Linn. Soc. N.S.W. xxxi. (1906), 

 Part 4, p. 727 ; Martin, ^schnines Coll, Sely.^ fasc. xix. (1909) p. 112. 



Types : c? ? , Coll.. Tillyard. 



Habitat. New South Wales, Sydney district and lower Blue Moun- 

 tains ; also Illawarra district iind Mittagong. I have also taken the larva, 

 but not the perfect insect, on Pocky Creek, Nandewar Panges, near Bingara, 

 N.S.W. 



Life-Histor y. — This species appears very late in the season, at the end 

 of February or beginning of March. The immature imagines fly straight 

 up into the trees, which become their home for the rest of their existence. 

 Consequently, one can always find throughout March and April very many 

 more exuvise than imagines. At Heathcote, N.S.W. , on April 12th, 1909, 

 I found the exuvise thick on every stick and stem jutting out from the creek. 

 On one twig I gathered no less than twelve exuvia3, while in some cases 

 they had climbed on to one another's backs for lack of room. Most of the 

 insects had evidently been out for some time, but a feu' v/ere still emerging, 

 and I secured a long series of perfectly fresh clean larval skins. Though 

 it was a warm sunny day, I only captured six imagines. 



As is usual with those Driioonflies which live in the forest, the imaoines 

 remain immature for a long time, especially the females. During the day 

 they may be ""seen flying high up round the trees, alternately soaring and 



