547 



DESCRIPTIONS OF THREE NEW SPECIES OF 

 AUSTROGOMPHUS [Neuroptera : Odonata]. 



By R. J. TiLLYARD, B.A. 



(Plate xxxiv.) 



The Australian species of the subfamily Gomphinse are com- 

 prised in the three genera Aust7'ogomphus, Ictinus and Petalura. 

 The two latter contain one species apiece; of the former, twelve 

 species have already been described. Three new species are now 

 added, all of which come from Northern Queensland. 



1. AusTROGOMPHUS ARBUSTORUM, n.sp. ( = proselytus Selys, MSS.) 

 (Plate xxxiv., fig.l). 



(J. Total length, 38 mm.; abdomen, 28 mm.: wings, fore 23mm., 

 hind 2 1-5 mm. 



Wings. — Neuratio7i black; memhranule nil; jHerostigma 

 nearly 3 mm., fairly broad, black. Nodal Indicator 10-12 7-9 



7-9 7-9 



Head. — Occipital ridge I mm., black with a large triangular 

 yellow spot. Vertex black with a round excavate yellow spot. 

 Ocelli in a triangle, front transparent, other two black. Antennce 

 short, black, basal joint short, thickened, a small yellow spot on 

 inner side of base. Eyes brown. Front low and narrow, yellow 

 with a black band, widest in the middle, across the clypeal 

 suturCj and extending on to the postclypeus. Clypeus yellow. 

 Lahrum yellow, upper suture black; often with a thin vertical 

 transverse central line reaching half-way across from above. 

 Labium and mandibles yellow; mouth edged with dark brown. 



T h o r a x. — Prothorax black with a transverse yellow line and 

 a central yellow spot. Meso- and metathorax black, marked with 

 yellow as follows : — A pair of dorsal spots next prothorax; behind 

 these an interrupted yellow collar formed by two transverse 



