321 



the time a copy of Le Baron's Fourth Illinois Eeport was referred 

 to and a careful comparison made with the figure of that insect. Then, 

 too, the writer has always (that is from a period as far back in life as 

 he can recollect) known the difference between a " thousand-legged " 

 worm and a " worm." 



Everything being favorable the coming summer, it is the present in- 

 tention to secure specimens of this luminous Nebraska myriopod that 

 will speak for themselves. In the meanwhile let us hear from other 

 American entomologists who may have seen light-producing myriopods 

 in this country. 



The animal is, without doubt, exclusively a nocturnal form, since a 

 careful search during daytime failed to reveal any specimens of it. 



THE PREPARATORY STAGES OF EUSTROTIA CADUCA. 



By D. S. KellicotT; Columbus, Ohio. 



At Elves Junction, Jackson County, Michigan, in July, 1876, I ob- 

 tained from a larva found eating the fruit of Nuphar advena, a specie- 

 of Eustrotia which Mr. Grote described and named in Canadian Ento- 

 mologist., Vol. VIII, p. 207, Eustrotia caduca, I have since sought for 

 this larva in many localities without success until July of this year at 

 Ooruniia, Michigan, where it occurred, not uncommonly, on the yellow 

 pond lily growing in the Shiawassee River. At the time of the first 

 finding I had but recently commenced to observe insects, and very im- 

 perfect notes were made ; the more favorable opportunity of last month 

 has enabled me to give more exact data concerning its characters and 

 habits. 



The eggs. — These are placed on the upper side of floating leaves, in 

 irregular patches of a few in number, and at a little distance from one 

 another. They are hemispherical, 1 millimetre in diameter, and with a 

 waxy hue ; the surface is beset with about thirty meridional, nodular 

 ridges. 



The young escape by cutting nearly off a round lid which it lifts on 

 a hinge. Soon after escaping the larvae are 2 millimetres in length with 

 large head and slender body; the skin is green with numerous pilifer- 

 ous spots. The first molt occurred the third day ; after this ev^ent the 

 length was 7 millimetres; the black spots had disappeared leaving the 

 general color pale green with faint white dorsal and subdorsal lines, head 

 lustrous and immaculate. The subsequent growth was rapid and there 

 was no other notable change until the last molt, so I will only describe 

 before and after this change. Those under observation reached this 

 period July 11. They were then 20 millimetres in length, elongated, 

 tapering slightly from the middle to the extremities; head nanow, 

 smooth, pale luteous with faint brown dots, body naked, pale yellow- 



