152 THE CANADIAN ENTOMOLOGIST 



In Nova Scotia it is most common on pears and apples, swarming 

 over the trees in large numbers during the spring and early summer. 



LIFE-HISTORY. 



The emergence of the nymphs from the eggs commences several 

 days before the apple blossom petals open, and continues for some 

 time after they fall, a period, speaking generally, including the 

 latter part of May and the first part of June. The duration of the 

 nymphal stage is from 7 to 8 weeks. 



Some days after emergence copulation takes place, and shortly 

 after this, the eggs are laid. Selecting a suitable place, most fre- 

 quently in the fruit spur, or a roughened surface on one of the 

 smaller twigs, the female makes a puncture with her beak. She 

 then draws herself forward and inserts her ovipositor in the spot, 

 remaining thus for several minutes. She then removes her ovi- 

 positor, rests for several minutes, and selecting another suitable 

 location, repeats the process. 



There is only one brood a year, the winter being spent in the 

 egg stage. 



REFERENCES. 



1. Fitch, Asa, (1851). Idiocerus maculipennis . 4th Ann. Rept. 

 of the State Cabinet of Natural History, p. 59. Reprinted 

 in 9th Rept. Inj. Ins. of N. Y. for 1892 (1893), p. 399. 



2. Walker, Francis (1852). Bythoscopus macidipenms. List of 



Homop. in Brit. Mus., IV, p. 1161. 



3. Van Duzee, E. P., (1890). Idiocerus maculipennis. Psyche, 



Vol. V, p. 388. 



4. Osborne, H., (1892). Idiocerus maculipennis. Proc. la. Acad. 

 Sc, Vol. I, pt. II, p. 12. 



5. Van Duzee, E. P., (1894). Idiocerus maculipennis. Trans. 

 Amer. Ent. Soc, Vol. XXI, p. 262. 



6. Osborne, H. & Ball, E. D., (1898). Idiocerus maculipennis. 

 Review of the North American Species of Idiocerus. Proc. 

 Davenport Acad. Sc, Vol. VII, p. 127. 



7. Osborne, H., 1898. Idiocerus maculipennis. Rept. la. Agr. 

 College for 1898, p. 9. 



8. Van Duzee, E. P., (1909). Idiocerus fitchi. Can. Ent., Vol. 

 XLI, No. 11, p. 383. 



