i2 4 REPORT OF NEW JERSEY STATE MUSEUM. 



PSEUDOCOCCUS Westw. 



P. citri Risso. Common mealy bug. Found in greenhouses throughout 

 the State and on a great variety of plants, cultural and ornamental. 

 Soap mixtures are usually found successful against these insects, but 

 must be frequently applied until the species is gotten under control. 



D. longispinus Targ. Another common mealy bug, the "adonidum," of 

 the last edition. Occurs on ferns, cycas and other greenhouse plants. 



D. sorghiellus Forbes. Feeds on sorghum and also found in the nests of 

 ants of varioiis species of "Lasius." 



D. trifolii Forbes. Clover root mealy bug; sometimes abundant enough 

 to be injurious. 



Sub-family 



PULVINARIA Targ. 







Fig. 51. Cottony maple scales: a, Piilvinaria acericola 

 on leaf; b, P. innumerabilis on the twigs. 



P. acericola Walsh & Riley. A cottony scale on maple leaves; not 



really common in New Jersey, but g. d. 

 P. innumerabilis Rathv. The "cottony maple scale." Occurs throughout 



the State, chiefly on soft maple, but also on grape and Virginia 



creeper. Found chiefly on twigs and branches and sometimes 



seriously injurious to shade trees. 



