346 Vniversihj of California PuUications [Entomology 



The winged forms are dark and often very numerous in large 

 pseudogalls on the leaves of the English elm, JJlmus campestris 

 Smith, at Berkeley, California, July 8, and Hayward, California, 

 July 14, 1916. 



Eriosoma lanigera (Hausm.) (fig. 30). A dull reddish species 

 with the bodies entirely covered with long white woolly material 

 giving rise to the common name woolly aphis. A very common 

 species throughout the state on apple and rarely on pears. 

 Sexuparae begin to appear the last of September on the campus, 

 but so far I have not succeeded in taking the sexuales. 



Chermes cooleyi Gillette. A very small pinkish or dark, 

 nearly globular plant louse occurring on the needles of various 

 conifers and usually covered with white cottony material and 

 appearing as small white specks on the trees. Sometimes very 

 abundant and injurious. Taken on the campus on Monterey 

 pine and other conifers, March 29, 1916. 



Transmitted January 8, 1917. 



