672 



MR. B. F. CL'MMIXGS OX LICS 



Spermatophores in IbicltBCUS. (Text-fig. 21.) 



Ibidcecus plataleie. — The receptaculum seniinis is an irregularly 

 shaped sac at the end of an extremely fine chitinous duct which 

 opens by a small aperture through the chitinous intima of the 

 genital chanibei-. The duct is finer than in Neophilopterus incom- 

 pletus and the calyx is of a very different shape, being bent back 

 around the top of the duct. Inside the sac may be seen the 

 spermatophores — hard, thick-walled follicles containing nests of 

 spermatozoa. In some of these no opening could be discovered. 



Text-fieure 21. 



Receptaculum seminis of 1. Ihidnecus platalece, 2. I.flavus, and 3. Neophilopterus 

 incompletus. X 70. 

 S. spennatodome. C. calyx. D. duct. N. nest of spermatozoa. 



Ibidoecus Jlavus. — The receptaculum resembles that of /. platalece 

 and gives the same suggestion of a hydroid on its stalk. Just 

 within the calyx, however, the canal opens into an atrium, absent 

 in the preceding species. The flask-shaped spermatophores, five 

 in one female and eight in anothei", lying loose and disposed 

 irregularly, somewhat recall the form of the spermatophore 

 figured by Von Siebold (13) for the Locustid Decticus verruci- 

 vorus, but the mouth is much larger and the neck broader. In 

 each spermatophore in the first specimen was a nest of sperma- 

 tozoa. In the second they were absent and had probably been 

 discharged. 



Cholodkovsky (14 and 15) divides the spermatophores in insects 

 into four distinct types — (1) True spermatophores arising from 

 the sexual organs of the male arid faeilitatins' the transference of 



