3o8 



Journal of Agricultural Research 



Vol. IV, No. 4 



Table II. — Length of life of adult Tetrastichus asparagi at the Riverhead, N. Y., 



laboratory in igi2 



o The average length of life was 7.1 days; the maximum, 14 days. 



6 Records for the last 2 days only. 



<: Records for the last 3 days only. 



<* Several eggs hatched in the parasite vials. 



Table III. — Life cycle of Tetrastichus asparagi at the Riverhead, N. Y., laboratory in IQI2 



o Pupa. 



6 Adults. 



SEXES 



Dead. 



During the time that this parasite has been under observation only 

 females have been found, both among the adults collected in the field and 

 among those reared in the laboratory, and reproduction has been parthe- 

 nogenetic, so far as has been observed. Of two generations that have been 

 reared in the laboratory, no males have appeared. 



