BEE OR WASP: LABORATORY WORK. 



What peculiarities do you find in the antennal joints ? 

 Are both compound eyes and ocelli present? Are the 

 mandibles, like those of the grasshopper, fitted for biting ? 

 How do the other mouth-parts compare in shape with 

 those of the grasshopper ? Do you find a " tongue " ? 



How many thoracic segments ? Are all freely movable ? 

 Which is the smallest ? Which bear wings ? Which pair 

 of wings is the largest ? Are the veins of the wings many 

 or few ? Are the wings transparent ? 



Does the abdomen join the thorax by its whole width, 

 as in the grasshopper ? or is there a slender stalk joining 

 the two ? How many abdominal segments do you find ? 

 Squeeze the abdomen and look for the sting. Does it 

 compare in any way with the ovipositor of other insects ? 

 Where was it before pressure was applied ? 



COMPARISONS. 



Rule a sheet of paper with columns for Grasshopper, 

 Beetle, Dragon-fly, and Wasp, and write the answers in 

 each to the following questions : 



(1) Are ocelli present ? 



(2) Are the antennal joints equal in size ? 



(3) Are the maxillae and labium short and stout, or 

 long and slender ? 



(4) Are any of the thoracic rings free ? 



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