THE CANADIAN ENTOMOLOGIST. 187 



the smaller head and narrower pronotum, the width of which, in angns- 

 ticollis, is less than the dorsal field of the tegmina in their natural position. 

 It differs ixom. palustris in the much greater size, the longer and broader 

 tegmina in the male, lighter maxillary palpi and shorter ovipositor, with 

 more irregular teeth. From confusus the male of angusticoilis differs in 

 the longer and broader tegmina, those of confusus covering only three- 

 fourths of the abdomen, and in the uniform coloration of the hind femora, 

 those of confusus being blotched and spotted on the inner surface. The 

 females of augnsticollis approach those of confusus so closely that they are 

 separated with difficulty. The last two joints of the maxillary palpi m 

 the latter are white, those of the former light brown; the hind femora and 

 ovipositor are somewhat shorter in confusus, while the pronotum as men- 

 tioned before is broader than yi angusticoilis. From exiguus, angusticoilis 

 differs in the much darker and more uniform coloration, the much broader 

 body and tegmina in the male, narrower hind femora, and in the some- 

 what longer and more sharply-toothed ovipositor. 



Although neither has been reported from Ontario, I have figured both 

 exiguus and confusus from specimens kindly loaned me by Mr. Blatchley, 

 because it is thought that this will aid in the separation of these difficult 

 species, and it is quite possible that both, especially exiguus, will eventu- 

 ally be found to occur in Ontario. Angusticoilis is, next to fasciatus, the 

 commonest Nemobius in Ontario. It frequents low grounds of almost any 

 kind, but delights especially in low grassy borders of swampy woods or 

 clearings in swamps. I have found it in abundance in sphagnum moss 

 when growing in such localities, but have not met with it in the open peat- 

 bogs where N. palustris occurs. It is also found beneath stones along 

 the margins of lakes and streams. 



I first discovered this insect through its stridulation, which I heard 

 among the granite boulders which line the shores of Lake Simcoe at De 

 Grassi Pt. It was a high-pitched continuous trill of considerable volume, 

 and although I could approach the performer within a few feet, it was 

 always necessary to disturb the rock in order to expose him. This, of 

 course, not only silenced him, but allowed him to make himself scarce, 

 and it was not until after repeated efforts that I at last secured one of the 

 little musicians. 



Of the long-winged form I have but a single pair, a male taken at De 

 Grassi Pt., July 30, 1901, and a female from the Severn River, Aug. 24, 

 1898. 



