824 



AUSTRALIAN 3IEGAL0PTERA OR ALDER FLIES, 



vein between R2+3 ^^^^ ^4-1 5 is exceptionally^ oblique in direction. 



Genotype, Steiwsialis aitstraliensis, n.sp. 



JI(tb South Queensland. 



As with Aitstrosialis, so with this genus; the arrangement of 

 the branches of Rs and M corresponds exactly with that of the 

 oldest Trichoptera, M3_|_4 being branched in the forewing, but 

 simple in the hind. One is tempted to ask, is this merely the 

 result of a chance convergence, or does it indicate a closei" rela- 

 tionship between the two Orders Megaloptera and Trichoptera 

 than has hitherto been suspected 1 



Text-tig. 3. 

 Wings of Stenosialis aastrallensi-^, n.g. et sp. Notation as in Text-tig. 1. 

 (The wings of the type-specimen being considerably torn, the figure 

 was completed by combining portions of both right and left pairs of 

 wings). (Hindwing 10 mm. long). 



Stenosialis australiensis, n.sp. (Text-fig. 3). 



7'otal length, 8 mm.; abdomen, 4 mm. ; forewing, 11 -5 mm.; 

 hindiving, 10 mm.: expanse, 25 mm. 



Head brownish, a darker area posteriorly on occiput, isolat- 

 ing several paler raised circular areas placed close together on 

 either side of the mid-dorsal depression. Eyes dark brown. 

 Antennm dark brown, the basal joint large and stout, the second 

 joint small; the rest missing. 



