98 THE CANADIAN ENTOMOLOGIST. 



a skin roughened with granulations and capitate or clavate projections 

 (overlooked by previous describers), the little projections being visible 

 even in the first stage, at which time they are less capitate. The Chan- 

 Hodes larva has the last pair of spiracles on the tips of a pair of contractile 

 filaments described as setae by Walsh, who failed to apprehend their real 

 nature and wrongly described the Chauliodes larva as having one pair of 

 spiracles less and one abdominal joint less than that of Corydalus, 

 whereas both larvse have the same number of joints and spiracles, and 

 both possess the rudimentary mesothoracic spiracle, which Mr. Riley finds 

 more common in insects than is generally supposed. In other structural 

 respects, as well as in habits and transformations, the two larvae greatiy 

 resemble each other. The eggs of Chauliodes have a longer tubercle or 

 stem on the top, and are not covered with white albuminous material as 

 are those of Corydalus. Mr. Riley has obtained large additional numbers 

 of the egg masses of the latter during the past summer, finding them not only 

 on the leaves as described in his former paper, but on the stems of differ- 

 ent trees, as well as on rocks overhanging water. He has had as many 

 as twenty egg masses on a single maple leaf, both sides of the leaf being 

 completely plastered up by them ; and as a large number of these masses 

 will generally be found in some one particular locality, or on a few 

 branches of the same tree, the assumption is that the females congregate 

 for purposes of oviposition. The white, albuminous substance covering 

 these eggs shows by analysis that it has all the physical properties of wax. 



How do Crickets Produce their Sound ? — I have frequently tried 

 to find out how crickets produce their well-known chirrup ; but only on 

 one occasion did I succeed in inducing a cricket to exercise itself in that 

 direction, they having apparently a great objection to " sing" in captivity. 

 On the occasion I refer to, I put two crickets — a pair — under a tumbler, 

 whereupon the male immediately raised its elytra and shuffled them 

 together, producing a noise which would be best represented by the word 

 " shilly.'' . It repeated this several times with its head towards the female, 

 who probably considered herself insulted, for she literally clawed his face 

 with one of her hind feet, supplementing this action with a sudden and 

 violent kick, and from that time the male took no more notice of her. — 

 J. P. B., in Science Gossip. 



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