BY R. J. TILLYARD. 469 



PsEUDAGRiON Selys, a me restrictum. (Plate xlix., figs.l5, 16). 



Basal postcostal nervule about midway between the levels of 

 the two antenodals. Pterostigma unicolorous, short. Venation 

 rather close; wings fairly narrow. Abdomen long and slender. 

 Superior appendages of male bifurcated or hollowed out (except 

 in Ps. ignifer); inferior shorter. Prothorax of female furnished 

 with two hooks pointing forwards. Medium to large insects of 

 blue or orange colouration. 



Type : Pseudagrion furoigerum Rambur; following Selys. 

 But I doubt if, even as now x-estricted, this genus forms a homo- 

 geneous group; the type-species, at any rate, seems to possess 

 some peculiarities not shared by other members of the genus. A 

 careful study may show the necessity of further division; unfor- 

 tunately, I have seen scarcely any of the non- Australian species. 



37. PsEUDAGUioN IGNIFER Tillyard. 



Tillyard, loc. cit. p. 188. 



(J. Appendages: superior 0'5 mm., black, with a brown 

 spot or mark, pointed, with a long and moderately broad sub- 

 triangular shelf, the inner lobe of which is rounded; in profile, 

 I'ather thickly sublanceolate, fairly well pointed; inferior 0'2 mm., 

 thick, truncate(Plate xlviii., figs. 21, 22). This species forms the 

 passage between Paeudagrion and Caliayrion, being very close to 

 the latter in the form of its appendages, and intermediate in 

 general build, which, though not so robust as in Caliagrkm, is 

 somewhat more so than in the more typical species of Pseudagrion. 



Hah. — Cairns, Kuranda, and Cooktown, N. Queensland; Bel- 

 linger River, N.S.W. At the latter locality, I took a very fine 

 series distinctly larger and more brightly coloured than my tj^e- 

 series from N. Queensland. 



Types: $^, Coll. Tillyard(Kuranda). 



38. Pseudagrion Australasia Selys. 

 Selys, loc. cit., p.261. 



(^.Appendages : superior 0-4 mm., bifid, the upper lobe 

 shorter than the lower; a small inner shelf irregularly notched; 



