REPORT OF STATE ENTOMOLOGIST, 1898 



239 



abundant secretion of waxy threads renders it very promnent. The 

 photograph of the adult colony represented in fig. iSa was taken July i. 

 About this time the young (fig. 19) appear in large numbers and found 

 colonies near the tips of the smaller branches. Fig. 18/^, of a young 

 colony, is from a photograph taken July 16. This insect occurs not only 

 on species of alder but also attacks birch. It has an enemy in the little 

 orange butterfly, I^eniseca tarquinins Fabr., the larva of which lives in the 

 colonies and devours the aphids. 



Fig. 18 Adult females and young of pemphigus tessellatus (original), 



Pulvinaria innumerabilis Rathv. This destructive scale insect is 

 being constantly brought to notice here and there in the state, though 

 during the past few years it appears to have been less destructive 

 than usual. On July 5 this scale was reported as injuring the elms 

 seriously at Sandy Hill, N. Y., and affecting the maples to a less extent. 

 At that time the young had not left the protecting filaments of the 

 mother, though they were numerous in the cottony secretion. A few 

 days later twigs of maple were received from Baldwin, L. I., their con- 



