276 



ELEMENTARY STUDIES IN INSECT LIFE 



pillars with light color and delicate skin, when they are 

 held between the observer and the snn. 



REPRODUCTIVE SYSTEM. 



Should a female be examined a few clays previous 

 to the time of oviposition, the ovary will be found 

 much distended and containing about one hundred eggs. 

 These eggs are carried out through the egg-duct and 



FIG. 211. Reproductive system of female grasshopper. Large egg-sac lying above stomach ; ovi- 

 (kict leading out above egg-guide (the external opening of oviduct is above point where duct is cut by 

 this sectional figure) ; r, rectum ; a-a, digestive tract. Enlarged three times. 



placed in position in the ground in the manner previ- 

 ously shown. If eggs are present in the specimen now 

 studied, make a drawing of the lateral view of the 

 whole ovary and of one of the eggs. 



THE BEETLE. 



That some conception may be obtained of the dif- 

 ferences and resemblances existing between the relative 

 parts in different insects, the anatomy of the rummag- 

 ing ground-beetle 1 is outlined. 



This is not an uncommon insect, and can be found 

 in the woods around decaying logs, or under rocks. It 



} Calosoma scrutator. Any of the larger beetles belonging to the Carabidae, the 

 ground-beetle family, will do. 



