THE CANADIAN ENTOMOLOGIST 43 



in hindwing are the humeral, an obHque one connecting Ri with Rs towards 

 half-way, and two connecting Cu2 with the fused vein above it in its distal 

 half). 



The locality for this species is Tasmania. Though I have collected care- 

 fully in many places throughout the island, I have never met with it. The 

 common Leptoperlids of Australia, Tasmania and New Zealand do not belong 

 to this genus. 



Dinotoperla, n. g. 

 • (Text Fig. 4b). 



Cerci shorter than the abdomen. Third joint of tarsus slightly longer than 

 basal joint. Forewings with Rs simple, Cui deeply forked, and complete sets 

 of cross-veins between M and Cui, and also between Cui and Cuo. Hindwing 

 with only slight fusion between M3+4 and Cui, and with the anal fan narrower 

 than the rest of the wing at the end of Cuo. 



Genotype. — Leptoperla opposita Walker, Tasmania. 



This genus differs radically from Leptoperla Newm. in its much shorter 

 cerci, its longer distal joint of the tarsi, in the loss of the fork of Rs and in the 

 retention of the fork Cui. It is closely related to Gripopteryx End. and Para- 

 gripopteryx End., from South America (these two genera are barely distinct), 

 but can be at once separated from them by the unforked Rs of the forewing 

 and by the possession of the complete series of cross-veins between M and Cui. 



A number of undescribed species of this genus occur in Australia and 

 Tasmania. 



Zelandobius, n, g. 

 (Text Fig. 4c). 



Allied to Gripopteryx End. and Paragripopteryx End. from South America' 

 but distinguished at once from them by possessing a simple Cui in forewing 

 and a wide anal fan in the hindwing, as well as by the retention of the complete 

 series of cross-veins between M and Cui in forewing. Rs is distally forked as 

 in Gripopteryx and Paragripopteryx. 



Genotype. — Leptoperla conjiisa Hare, New Zealand. 



Leptoperla hiidsoni Hare also goes into this genus, but L. ftdvescens Hare 

 and L. mactilata Hare belong to Aitcklandohius End. All these species are 

 from New Zealand. 



Zelandobius differs from Aiicklandobius in ha\ing Rs distally forked in the 

 forewing, and the fusion of M3+4 with Cui not complete in hindwing. Auck- 

 landobius differs from Antarctoperla End. chiefly in its much wider anal fan 

 and in the complete fusion of M3+4 with Cui in hindwing. 



Both Zelandobius and Aiicklandobius are represented in New Zealand by a 

 number of undescribed species. The Leptoperlidce of South America are evi- 

 dently closely allied to those of New Zealand and Australia, and a knowledge 

 of all the forms is necessary for the study of those in any one region. 



EXPLANATIOX OF TeXT FiGURES. 



lA, 2A, 3 A, first, second and third anal veins, respectively; Cui, first cubitus, 

 with its branches Cum, Cuib, Cuic, Cuid; Cu2, second cubitus; M1+2, M3+4, the 

 two branches of the media; Ri, radius; Rs, radial sector, with its branches 

 R2, R3, R4, R5; Sc, subcosta. 



