QROWTE AND METAMORPHOSIS OF JSS1 



be found in various stages of development 'i 

 in two main tubes which unite to form the luct 



{pv.t) which lies "ii the floor of the abdomen. 

 A B 



Fig . Ihophorabia rctiua. .4, male; B, female. — After Ni 



the opening of the oviduci is the sebific -land and its duct. 



This gland Becretes a copious supply of a sticky fluid, which 



- in many other insects, poured ou1 as thi • out 



87. - Egg tube of a saw-fly (Athalia). a, >•. <•. eg 

 matheca or reservoir for the seminal fluid; 

 vessels (fc); 10, the last nerve centre >>i' ihe abdomen 



of the oviduct, thus surrounding them with a tough i 

 (compare Fig. 2 i (. 



