44 STUDIES IN AUSTRALIAN NEUROPTKRA, ii. 



they are fewer, wider apart, and less regular). Towards apex 

 of wing, a set of cross-veins forms a distinct, curved line running 

 across the wing from M to pterostigma, separating off an internal 

 "disc" from a distinct apical portion, which carries only closely 

 parallel, longitudinal veins (cf. Psi/chopsis); in Porismns, this 

 line is absent. Four anal veins present, as in Porismus. hut 2A 

 and 3A stand further from the posterior border, and the cross- 

 veins arising from them are longer and more numerous than in 

 Porismus. 



Genotype, Euporisnius albatrox, u sp. 



This genus may be placed as intermediate between Porismns 

 and Oedosmylas; for, while it resembles the former in the strong 

 branching of Ou, and in the dense wing-pigmentation, it ap- 

 proaches the latter in the shape of the wings, and in the pos- 

 session of the apical line of cross-veins. 



It is interesting to note that a fossil insect-wing, closely re- 

 sembling the hind- wing of F. albatro.c, has recently been dis- 

 covered in sandstone-rock at Goodna, near Ipswich, Q This 

 rock is supposed to have come from a Tertiary deposit (? Eocene) 

 overlying the Trias-Jura rocks of the Ipswich Coal- Measures. 



I.EUPORISMUS ALBATROX, n.Sp. (PI i., fig.l). 



Total length 16'5, abdomen 9'5, forewing 30, hindwing "iSmra. 



Head very small, 25 mm. wide; e^yes dark olive-brown; the 

 three ocelli large, black, the median one very distinctly double; 

 epicranium black, antennce 11 mm., slender, black, basal joint 

 twice as long and thick as the second; lahnim and moiUhparts 

 shiny brown. 



Thorax : prothorax Iwmm., elongate, slender, orange-brown. 

 Pterothorax orange brown, marked with black in the sutures, 

 especially along the middle line; wing-bases blackish. Legs 

 black, fore- and middle-legs short, hind-legs long. 



Abdomen short, of medium width, dark grey above, marked 

 with numerous, orange-brown spots; underside orange-brown, 

 especially at apex. 



Wings: venation very close and abundant. Costal border of 

 forewing strongly arched near base; costal space wide near 



