58 



Studies on Life-history of Bomhycine Mofht 



between the piliferous warts. A small slender white lateral pencil 

 on 3d thoracic segment, and a thicker black one on 1st abdominal 

 segment of about the same length. The other black pencils are a 

 little longer than before. The 2d and 3d thoracic segments have a 

 pair of small dorsal yellow transverse slashes on each side, and the 

 dorsal tubercles on these two segments are bright yellow and very 

 conspicuous. The prothoracic piliferous tubercles are still bright 

 Indian-red. The lateral pale hairs along the body are whiter and 

 denser than before. The head is black, not coral-red as in 0. leu- 

 costigma. 



June Tth several began to spin a cocoon {%?). June 8th, 4 or 5 

 cocoons. The 9 larvae were still molting June 14th; none yet in 

 cocoon ; I think the 9 larva must molt oftener than the Z . 



Variation in the four dorsal tufts of last stage : Some are all 

 cream-white, others are buff-yellow, in others the 2 anterior dusky, 

 and 2 posterior buff-yellow, and in one specimen of the 2 anterior 

 tafts, one is dusky and the 2 posterior are snow-white. 



Of 12 cocoons, all up to June 15th seemed to be %. June 18th, 

 2 % moths appeared ! 



Fig. 1. 



One of the black plumose hairs taken from a lateral prothoracic 

 tuft is represented at Fig. 1 ; a, portions of a simple, spinulated hair. 



