THE CANADIAN ENTOMOLOGIST. 325 



NOTES ON THE LOCUSTID^ OF ONTARIO. 



BY E. M. WALKER, B.A., M.B., TORONTO. 



7^he Locustid?e (Tettigonidfe, Rehn), comprise the long-horned or 

 green grasshoppers, katydids and camel or stone crickets. They have for 

 the most part a southern distribution, and hence are but poorly represented 

 in Ontario, except in the south-western part, to which the majority of the 

 species are confined. 



Five sub-families are represented in the province, and twenty-six 

 species have been found, many of these being now recorded for the first 

 time. All, or nearly all, of these occur in the south-west, but the number 

 of species rapidly diminishes northward, and in the boreal zone not more 

 than six or seven species are to be found, only one or two of these being 

 at all characteristic of the north. Along Lake Erie the genera Orchelinmm 

 and Xiphidium are well developed, there being eight species of the 

 former, only one of which, O. vulgare, extends north of the south-western 

 peninsula. To this region is also confined the sole representative of the 

 sub-family Decticinse, Atlanticiis pachymerus. There are doubtless also 

 unrecorded species in the south-west, especially in the genera Cetithophilus 

 Conocephahis and Xiphidium. 



In the preparation of the following notes I am indebted to Messrs. 

 Blatchley and Caudell for their kind assistance in the determination of 

 puzzling species. 



Excellent tables for the determination of all but one species of our 

 Locustidae are to be found in Blatchley's " Orthoptera of Indiana," in the 

 27th Annual Report of the Dept. of Geology and Natural Resources of 

 Indiana, 1902. 



Sub-family Phaneropterin.e. 



I. ScuDDERiA TEXENSis, Saussure-Pictet. The Texas Katydid. 



Scudderia Fexensis, Sauss -Pict , Biol. Cent. Amer. Orth, 1897, 328. 



Scudderia curvicauda, Bl, Proc. Ind. Acad. Sci., 1893, 99. 



Measurements: Length of body, $ 25 mm., 9 28 mm.; of pronotum, 

 ^ 6.2 mm., 5 6.5 mm.; of hind femora, $ 29 mm., ? 28,5 mm.; of 

 tegmina, ^ 39 mm., $ 38.5 mm.; of ovipositor, 8 mm.; width of tegmina, 

 (J 8.2 mm., $ 8,5 mm. 



This fine large species is quite common in south-western Ontario, but 

 seems to be confined to that part of the province. I found it upon tall 

 coarse grasses and sedge growing in open marshes. Blatchley says it is 

 probably less arboreal than any other species of katydid. 



