Geometridae 



by D. W. Coquillet in the " Bulletins of the United States Depart- 

 ment of Agriculture," New Series, No. 7, p. 64. From this 



Fig. 205. C. plumigeraria. a, male; b, female, magnified. (After 

 Coquillet, " Bull. U. S. Dept. Agric," New Series, No. 7, p. 66.) 



article we have taken the accompanying cuts, and from it we 

 draw some of the facts herein set forth. In describing the insect 

 Mr. Coquillet says : " The color of the caterpillar is a light pinkish 

 gray, varied with a darker gray or purplish, or sometimes with 



black and yellow, but never 

 marked with distinct lines; 

 the piliferous spots are black 

 or dark brown, and the spir- 

 acles are orange yellow, ringed 

 with black, and usually situ- 

 ated on a yellow spot. The 

 worms become full grown in 

 the latter part of April or dur- 

 ing the month of May; they 

 FlG fi f \~ C ' P lumi gr ari ?\ a > larva ' then enter the earth to a 



magnified ; o, segment viewed laterally ; c, 



do. viewed dorsally. (After Coquillet, depth of from tWO tO four 

 -Bull. US. Dept. Agric," New Series, j h and form smaU ce ,i s 

 No. 7, p. 65.) 



but do not spin cocoons. 

 The change to the chrysalis takes place shortly after the cells are 

 completed, and the chrysalis remains unchanged throughout the 

 entire summer and until early in the following year, when they 

 are changed into moths, which emerge from the ground from the 

 first week in January to the last week in March. The male moth 



346 



