THE CANADIAN ENTOMOLOGIST. 271 



exhibited specimens of California pears, obtained in Brooklyn, which were 

 covered with the San Jose scale in all stages of development. 



Mr. Lintner exhibited an apple comings from Ottawa, Canada, handed 

 to him by Mr. Saunders, which was covered with the scales oi Mytilaspis 

 pomormn. 



Mr, Davis read a paper on Mealy Bugs and other lice. He gave a 

 careful re'sume' of the life-history of the common Mealy Bug ( Dactylopius 

 destructor), with detailed descriptions of the different stages ; also some 

 notes on D. longifilis. He also described a Coccus which he found on 

 roots of clover, giving a general account of the habits and careful 

 descriptions of the species. He also referred to Eriococcus azalece and 

 other scale insects. 



The paper was discussed by Messrs. Sirrine, Ashmead and Howard. 

 Mr. Sirrine thought Mr. Davis's clover Coccus was the same as the one 

 found by Professor Forbes on white clover, and named by him Coccus 

 tri/olii, Mr. Ashmead coinciding in this view, and Mr. Howard stating 

 that the Eriococcus azalece was certainly not an introduced species from 

 Belgium, as suggested by the author, since the species is not known in 

 Europe, an-d Professor Comstock has found it on wild plants near Ithaca, 

 indicating that it is undoubtedly a native species. He said also that the 

 two old species of Dactylopius referred to by the author had been shown 

 by Berlese to be synonymous with European species, and that their life- 

 histories had been worked out by this author in great detail. 



Mr. Marlatt read a paper on the Pear-tree Psylla in Maryland, in 

 which he described the sudden occurrence of this Northern pear pest in 

 tv/o orchards on the eastern shore of Maryland, in very destructive 

 numbers. The introduction of the species was shown to have been upon 

 nursery stock from infested regions in New York, and the author was 

 confident that the injury, while excessively severe for the moment, would 

 not be of long duration, judging from the past history of the insect. A 

 brief review of the life-history was given, with some notes on the natural 

 enemies, notablya species of lace-wing fly (Chrysopa oculata), the larva 

 of which feeds voraciously on all stages of the Psylla ; also various species 

 of lady-birds, which are useful in a similar way. The life-history of the 

 lacQ-wing fly was carefully worked out. Experiments with various insec- 

 ticides on the eggs of the Psylla were detailed, and general recom- 

 mendations for remedial work were given. 



