40 



ENTOMOLOGICAL SOCIETY OF ONTARIO, 



It is po88ib)e to separate the genera of the family by the following method : 

 A. — Crickets with broad fore tibiae. 

 B. — Antennae long and setaceous. 





Fig. 27. Wing of (Ecanthus 

 angustipennis, female. 



Fig. 28. Wing of (Ecanthus 

 angustipennie, male. 



A A. 



Fig. 29. Horizontal portion of 



wing-cover of Nemobius 



fasciatus, male. 



C. — Fore tibiae with four spurs, Gryllotalpa. 



CO. — Fore tibiae with two spurs, Scapteriscus. 



BB. — Antennae rather short and filiform. 



C. — Body smooth ; head horizontal, Iridactylus. 



CO — Body velvety ; head vertical, Rhipiptoryx. 



-Crickets with slender fore tibiae. 



B. — Hind femora stout. 



0. — Apical spurs on hind tibiae five and equal, Anaxiphus. 



CO — Apical spurs six and unequal. 



D. — Last segment of maxillary palpi nearly same length as penul- 

 timate, Gryllus. 



DD. — Last segment of maxillary palpi twice as long as penultimate, 



Nemobius. 



BB. — Hind femora rather slender, Oecanthus. 



S Hi 



f «.., .(. I N ."Vsilj 



Fig. 30. Hoiizontal portion of 



wing cover of Nemobius 



vittatus, male. 



Fig. 31. Antennal marks and Harpa 

 areas of (Ecanthus. 



Venation of the Wings. 



H. de Saussure and J. Pungur have worked out a nomenclature of the veins in this 

 family. That portion of the wing cover which assumes a vertical position on the aide^of 



