234 THE CANADIAN ENTOMOLOGIST. 



(i). — Light green false Span-Worm. 



Length, 7 to 8 mm. Three pairs of prolegs, on segments 9, 10 and 

 13. Elongate and rather slim, light green in colour. Segments not 

 longer than wide ; with but very few short hairs, each arising from a 

 minute pale brownish dot in centre of a rather indistinct tubercle, a dozen 

 or so to each principal segment. Head likewise with hairs, which arise 

 from less plain dots. In addition to these, there is on each side of seg- 

 ments 5 to n a conspicuous black tubercle bearing a hair, these tubercles 

 being of same form as the others, but appearing much more conspicuous 

 and larger because of the black pigment they possess. 



Two specimens, swept May 12, 1891. (No. 80.) 



Note. — The measurements given above were made from the alcoholic 

 specimens, and are somewhat (usually a millimeter or so) less than what 

 the same specimens measured in life. 



CORRESPONDENCE. 



REARING SPHINX CHRYSALIDS. 



Sir: On the 30th of July, 1892, I saw a Sphinx larva digging into the 

 ground at the foot of an ash tree, evidently with the intention of burying 

 itself preparatory to transforming. I put it into a box I had in my 

 satchel, and forgot it until three days after. When I opened the box there 

 was a perfectly formed chrysalid instead. I placed it on the same bed 

 that the Quinquemaculata of my former record had matured upon (Can. 

 Ent., Vol. 24, p. 237), and paid no further attention to it. On the 20th 

 of June, 1893, that chrysalid gave forth a Sphinx chersis, Hub., large in 

 size, perfect in form and rich in colouring. This surely proves that mois- 

 ture is not an absolute necessity for the maturing of Sphinx pupae, of 

 these kinds at least. . . 



In my earlier efforts to obtain moths from Sphinx pupae I had no 

 success. Being under the impression that moist soil was necessary for 

 their maturing, all the careful attention I could give them was unavailing ; 

 they invariably died. Observing that soil getting between the segments 

 of the abdomen irritated them greatly, and kept them constantly wriggling, 

 I got some growing moss, put it on a plate, placed the chrysalids on it, 

 moistening it slightly, when all my troubles with them disappeared, — no 

 more moulding or drying up, they matured without fail, and the moths 

 emerged in perfect condition. This simple method was to me a most 

 gratifying success. I could now obtain the moths with no special attention 

 required for the chrysalids. 



