ON SPREADING BUTTERFLIES. 



47 



of one hand and pinch the thorax of the insect. This 

 can be done in such a way as to kill the insect at 

 once without crushing the specimen. It can then be 

 removed from the net and pinned and placed into 

 the collecting box. 



If the collector has a bottle of chloroform and 

 brush, as soon as the insect is at rest in a fold of the 

 net it can be killed by wetting its thorax with chloro- 

 form. This is done by putting the wet brush on the 

 net where it rests against the thorax of the insect. 

 The butterfly can then be removed and pinned into 

 the collecting box. 



5. Read paragraph on folded papers for butter- 

 flies, page 287. 



6. Go into the field and collect some butterflies. 

 Try to secure them in perfect condition rather than 

 to try to get a large number. 



7. If you have time to spread the butterflies when 

 you return from the field, pass at once to the next 

 lesson; but if not, put the specimens on damp sand 

 in a tightly closed jar or box and leave them till the 

 following day. See paragraph on relaxing insects, 

 page 305. 



LESSON XXIV. 



ON SPREADING BUTTERFLIES. 



Read the directions for making spreading boards 

 and for spreading insects on pages 303 to 305, and 

 then spread the butterflies that you have collected. 



