WHAT AN INSECT IS LIKE: OUTSIDE 15 



LABORATORY PROGRAM 



1. With a specimen of a stonefly nymph in hand read 

 the preceding pages, 3 to 12, and verify all the statements 

 therein, 



2. Do the same with adult stonefly. Note especially 

 the wings. Expand and refold them, and note their basal 

 articulation. 



3. Examine a grasshopper, nymph and adult, following 

 the same outline; identify every part. Note differences in 

 the shape of the body, in the larger development of the 

 hind legs. Note the backward slant of the side pieces of 

 the synthorax toward the leg bases. Observe that the wing 

 pads of the nymph are in position upside down, hind wings 

 overlying the fore. Note that the heavy, parchment-like 

 fore wings of the adult have become protective in function 

 and useless in flight, and that the broadly expanded hind 

 wings have a fan-like folding. 



4. Examine in like manner an adult dragonfly, noting 

 especially (1) the freedom of movement of the head; (2) 

 the enormous development of the compound eyes; (3) the 

 slenderness of the bristle-like antennae; (4) the smallness 

 of the prothorax; (5) the great size and consolidation of the 

 synthorax, with the forward slant of its side pieces toward 

 the bases of the slender and spiny legs; (6) the rigidity of 

 the long, veiny wings; and (7) the freedom of the slender 

 abdomen. (To be continued later, p. 51.) 



5. Examine in like manner an adult beetle, noting es- 

 pecially the freedom of the prothorax, and the consolida- 



