186 THE CANADIAN ENTOMOLOGIST. 



spruce and tamarack. For about a hundred yards beyond the mirgin of 

 the creek the swamp was a true floating bog, and the trees very few and 

 small ; and it was here that the crickets were found. They were present 

 in considerable numbers, but were very difficult to capture, and when 

 alarmed would at once burrow down among the masses of sphagnum. By 

 pressing these masses down under water, it was often possible to bring the 

 crickets to the surface. 



Mr. Blatchley, to whom I sent a pair, remarks that the specimens are 

 smaller than typical ones from Indiana. They are much the smallest of 

 the Ontario Nemobii. 



s. 



My attention was first called to this species by its chirp, which is a 

 continuous and rather feeble trill, very like that of N. atigusiicollis. 

 8. Nemobius angusticollis. New species. 



IV. pa/ustris, Walk., Ann. Rep. Ent. Soc. Ont., 1901, 109. 



Size medium, body of male very broad. Head small but prominent, 

 dark shining brown, more or less obscurely trifasciate above with darker 

 brown, rather scantily covered with black bristles. Eyes small but 

 prominent, oval. Maxillary palpi light brown, the terminal joint infuscatcd 

 apically. Pronotum nearly smooth, somewhat shining dark piceous, more 

 or less faintly variegated with lighter brown, sparsely covered with black 

 bristles ; slightly narrower at the anterior margin than the head, about 

 equal to it in width at the hind margin ; a rather deeply impressed 

 median longitudinal line on the anterior half Tegmina of S reaching 

 tip of abdomen, very broad, the dorsal breadth being much greater than 

 that of the pronotum, but fitting pretty closely to the abdomen ; uniform 

 deep shining piceous. Tegmina of $ covering about two-thirds of the 

 abdomen. Wings absent or fully developed, and extending beyond the 

 tips of the cerci. Legs and abdomen fuscous, the former more or less 

 variegated with pale testaceous, the hind femora without bands upon the 

 inner surface. Ovipositor a little more than one-half as long as the hind 

 femora, slightly arcuate, and feebly expanded at the base of the apical 

 fourth, each blade bearing an irregular row of rather sharp teeth, the basal 

 ones fine and close together, the apical coarse and unusually far apart. 



Length of body, $ 8 mm., 9 8.5 mm.; pronotum, ^ 1.5 mm., 9 

 1,6 mm., tegmen, ^ 5.4. mm., ■? 3.4 mm.; hind femur, $ 4.5 mm., $ 

 5 mm.; ovipositor, 3.3 mm. 



This species is most related to IV. cofi/usus and JV. paliistris, and 

 also resembles N. exiguus in some respects. It differs from all three in 



