BY R. J. TILLYARD. 243 



lobe 01- projection, thinner, curved downwards and inwards, black; 

 the tips of these two lobes are fairly close together. Inferior 

 strongl}^ bifurcated, the two portions wide apart, 0-6 mm., thick, 

 blunt, upcurved, black, downy (see Plate xxiii., figs. 9 and 10; in 

 fig. 9 the abdomen was slightly turned up to show all parts). 



9. Total length 48 mm., abdomen 34 mm.; forewing 28 mm., 

 hind wing 27 mm. It differs from the male as follows : Ptero- 

 Migma 3 mm.; very often a tinge of yellow on wings from base 

 up to nodus. Occiput with two small yellow tubercles in centre 

 at back of ridge, tips black (see Plate xxii., fig.9). Abdomen : 

 1-2 swollen, not cylindrical, thicker than in male, 7-10 soniewliat 

 enlarged when seen sideways. Markings more conspicuous; 3-6 

 with the basal sublateral yellow spot large, triangular, and 

 separated from the yellowish edging of the ventral carina; 7 with 

 a small round anal yellow spot on each side; 10 ending below in 

 a dark brownish tubercle, slightly hairy; a smaller round tubercle 

 above it, between appendages. Appendages: 0-9 mm., wide apart, 

 subcorneal, light yellow, tips black. 



This species is very close to A. praeruptus Selys, described 

 ■from a unique specimen (9) from Adelaide. The latter is a 

 larger species, abdomen 38 mm., hind wing 28*5 mm.; it differs 

 from A. melaleucce in having " three yellow points on the nasus 

 and front " and in the occiput carrying " two small black points, 

 olose together." I have not seen the type of A. praeruptus, which 

 is in the de Selys Collection at Brussels, but I sent specimens of 

 A. melaleucce to M. Ren6 Martin, who considers them a distinct 

 new species. 



Hah. — Duck Creek, Auburn, near Sydney, N.S.W. Rare; 

 December-February. 



This beautiful Gomphine differs from all others I have seen in 

 the richness of its yellow colouring, which is a brilliant lemon- 

 colour. In that respect it resembles Synthemis regina Selys, 

 which accompanies it in the bush near Duck Creek. Probably 

 the same causes have operated on these two species to bring about 

 the same colouration. It is also the only Gomphine known tome 

 which inhabits a sluggish stream. All the others prefer clear 

 mountain streams. 



