278 



CLASSIFICATION 



[CH. 



a little proximal to it. Quadrilateral variable in shape, but always free. 

 Wings rarely coloured. Cross-veins usually more or less completely arranged 

 in cross-sets. Abdomen slender. Body-pattern variable, often brightly 

 coloure^d. 



Larva variable in form. Caudal gills usually lamellar, constricted, 

 nodate, or subnodate, the division tending to disappear in the higher forms. 

 Gizzard of 8-16 fields, variable in dentition. 



Subfamily 1. Megapodagrioninae (figs. 23 D, 143). 



Nodus placed at from one-third to one-fourth of the wing-length from 

 the base (in Thaumatoneura, one-sixth). Quadrilateral somewhat irregular, 

 the distal angle being acute but not sharply so ; C'w 1 leaves it without arching 

 strongly upwards. Pterostigma regular, short or long. M 2 leaves M ^ nearer 

 to nodus than to pterostigma, rarely half-way between. Nearly always Ms 



Fig. 143. Hind wing (45 mm.) of Podopteryx roseonotata Selys, 2, 

 Queensland. Original. 



arises at subnodus, M 3 somewhat proximad to it. Ax 2 in line with arculus 

 (except Nesolestes). Main veins diverging towards distal end of wing, thus 

 allowing development of intercalated sectors. 



Larva (Argiolestes) short, thick-set (fig. 42 A). Mask short, flat, without 

 setae, resembling that of the Epallaginae. Caudal gills in the form of simple 

 lamellae, broadly foliate, horizontally spread out. Gizzard of 14-16 genera- 

 lized fields. 



Subfamily 2. Pseudostigmatinae (fig. 144, also PI. I, fig. 8). 



Nodus placed very close to wing-base, at one-sixth to one-seventh of the 

 entire length. M 2 arising very far distad from nodus. Quadrilateral fairly 

 regular, distal angle slightly acute. Postnodals very numerous, continued 

 across the wing as complete transverse veins. Two or more intercalated 

 sectors, with branches in the more richly veined forms. Pterostigma weak, 

 diffuse, abnormal or absent. Abdomen very slender, excessively elongated. 



Fig. 144. 



Hind wing (62 mm.) of MRciatogaster lucretia Drury, 

 Brazil. Original. 



