the Growth and Habits of Carausius morosus. 355 



roughness is probably the cause of the capsule's easy 

 adherence to any object however smooth if the surface 

 be only slightly moist. The inside of the capsule is, on the 

 other hand, very glossy, and under the microscope shows 

 complex reticulations. 



The weights are of eggs dropped by full-grown insects of 

 all ages after the sixth ecdysis. 



Six eggs dropped by the undersized full-grown insect, 

 No. 159, weighed '023 gr., or on average 3 - 833 milligrams. 



Fertility of the Eggs. 



In determining the quantity of fertile eggs dropped by 

 the individual insect under observation all the remaining 

 eggs were, several months after the date of the last hatching 

 out of the others, broken open and examined. The number 

 of eggs found to have been fertile, but unhatched, were 

 then added to the number which hatched out, and the total 

 treated as the quantity of fertile eggs. The following table 

 gives the results of the examination of four batches of eggs. 



Eggs dropped at the commencement are as fertile as 

 those dropped at a later stage ; 24 eggs dropped in the first 

 week by various beginners all hatched out, and out of 

 another lot of 26 first eggs dropped by any insects, 22 

 hatched out = 84*6%. Of 2 eggs, the last dropped by 

 different insects, 1 hatched out. 



Table V. — Fertility of the Eggs. 



OVIPOSITION. 



After the sixth or last ecdysis, from which proceeding the 

 insect emerges very attenuated, the same as after every 

 ecdysis, the ovaries begin to develop. 



I have only seen the egg produced on three occasions. 

 The emergence was slow and deliberate — it was, in fact, 

 mere egg dropping. On one of these occasions I happened 



