344 KANSAS UNIVERSITY SCIENCE BULLETIN. 



5. The differences between the field and domestic crickets 

 is probably great enough to prevent intermating, yet this is not 

 at all proven. 



6. Gryllus has no gland which secretes a lubricant for the 

 copulatory organs. The so-called "prostatic gland" has to do 

 with the formation of the thread and plate of the spermato- 

 phore. 



7. Mole crickets form a spermatophore. A transparent 

 viscid fluid flows out during the transfer. The male and the 

 female assume a very peculiar position relative to one another 

 during copulation. 



University of Kansas, 

 March 12, 1910. 



BIBLIOGRAPHY. 



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