56 



Pseudococcus aceris, means against, II, 46. 



Pseudosphinx tetrio, injurious to shade trees in Porto Kico, XXII, 90. 

 Psila rosge, injuring carrots, parsley, and celery in Norway, IX, 79. 

 Psoroptes communis, var. ovis, description and life history, V, 268. 



parasite of sheep, V, 266. 

 Psydrus piceus, habits and odor of, IX, 53. 

 Psylla mali, attacking apples in Norway, IX, 80. 

 pyricola, abundant in Maryland, XX, 64. 

 Psylliodes punctulata, feeding on rhubarb, IX, 22. 

 Pteromalus calandra?, parasite of Calandra, VIII, 43. 

 pallipes, parasite of Hessian fly, XVI, 33. 

 puparum, in 1900, XXX, 70. 

 vanessa?, parasite of Polygonia comma, VII, 51. 



interrogatonis, VII, 49. 

 Pteronus ribesii, damage by, in Maryland, XXVI, 82. 

 effect of cold winter on, XXII, 57. 

 injuring currants and gooseberries in Norway. IX, 80. 

 serious pest in Maryland, XX, 64. 

 Ptinus brunneus, food habits of, IV, 128. 



fur, food habits of, IV, 127. 

 Pulex avium, notice of, V, 147. 



bruneri, on spermophiles, V, 149. 

 coloradensis, on chickaree, V, 149. 

 fasciatus, on rats and mice, V, 148. 

 gigas, notice of, V, 152. 

 gilletti, from red squirrel, V, 149. 

 goniocephalus, notice of, V, 152. 

 hirsutus, on prairie dog, V, 149. 

 howardi, on squirrels, V, 148. 

 ignota=Typhlopsylla americana. 

 ina?qualis, on rabbits, V, 153. 

 irritans, habits of, V, 147. 

 longispinus, on chickaree, V, 149. 

 montanus, from large gray squirrels. V, 149. 

 sciurorum, on squirrels, V, 148. 

 serraticeps, habits of, V, 150. 



life history of, IV, 25; V, 151. 

 remedies for, IV, 29; V. 151. 

 simulans, on opossum, V, 146. 

 wickhami, from flying squirrel, V, 149. 

 Pulvinaria acericola, account of, XXII, 16. 



distinct from P. innumerabilis, XVII, 57. 

 in Georgia, XXVI, 52. 

 amygdali, in Georgia, XXVI. 52. 

 innumerabilis, abundant in New York, XVII, 22. 

 account of, XXII, 8. 

 in Georgia, XXYI, 52. 

 maclura?, in Georgia, XXYI, 52. 

 Pyralis costalis, infesting grape leaves, XVII, 99. 



farinalis, damage by, in Manitoba. XXYI. 96. 

 habits of, IV, 120. 

 life history of, IV, 120. 

 parasites of, VIII, 42. 

 fyrausta ferrugalis=Phlyct8enia rubigalis. 



