BUTTERFLY: LABORATORY WORK. 



Notice the relative size of the wings. How are they 

 carried when the insect is at rest? Rub the wings and 

 notice your fingers. Scrape a wing with a scalpel and 

 study the "dust" under the microscope. With what is 

 the body covered ? Sketch the veins in the wings. 



Study the head. Below, notice the proboscis. Straigh- 

 ten it out with a needle. At the sides of the base of the 

 proboscis see the labial palpi. Are the antennas of the 

 same size throughout their length ? Sketch the head in 

 outline, then remove the hairs, etc., which cover it and 

 look for eyes and ocelli, inserting what you find in the 

 drawing. 



Do you find in the legs the same joints as in the legs of 

 grasshoppers ? Have the tarsi of all the legs the same 

 number of joints ? Is the base of the abdomen as broad as 

 the thorax ? Do you find cerci or ovipositor ? 



COMPARISONS. 



With columns for Squash-bug and Butterfly, answer the 

 following questions: 



(1) What is the relative size of the two pairs of wings ? 



(2) How are they carried when at rest ? 



(3) Are they naked or covered with scales ? 



(4) Are either pair thickened at the base ? 



(5) Are distinct labial palpi present ? 



(6) Can the proboscis be used as a piercing- organ ? 



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