COCCID^ 



133 



ing or when changing from the nymph to the adult stages 

 may occur. 



Maple Scale {Puhinaria innumerahilis). — The maple scale 

 is a wide-spread and occasionally abundant and destructive 

 species, attacking particularly the soft maple and occurring 

 at times on other trees or woody plants. In this species 

 the adults mature in autumn and winged males issue from 

 the scale and mate with the females, the latter remaining 



Fig. 88. — Puhinaria innumerahilis: a, newly hatched young; h, female, 

 third stage, from above; c, same, from side; d, male, thiid degree; e, same, 

 natural size, on leaf and petiole; /, same, enlarged, on leaf petiole showing 

 two specimens parasitized, all greatly enlarged except e. (From Howard, 

 Buieau of Entomology, U. S. Dept. of Agriculture.) 



unwinged. They may, however, migrate from leaves to 

 twigs or branches and attach themselves firmly for the 

 winter, which is passed by the adult female only. In spring 

 the eggs are developed and by early June a very large cottony 

 mass is formed beneath the scale, lifting it from the bark, 

 except at the anterior end, and within this large cottony 

 mass an enormous number of eggs are deposited. Hatching 

 of the eggs occurs shortly after the deposition and the larvae 



