48 



INTRODUCTION TO ZOOLOGY. 



7. Study tlie sting. Tlie sting consists of a slieatli 

 and two lancets connected witli a ])oisoii bag. At the 

 end of the abdomen, find two palpi. 



8. AVhat is a ciueen? A drone? A worker? Of 

 what use is tlie bumblebee's color? 



THE WASr, OI{ HORNET. 



1. Look on the wasp for the same things you found 

 on the bumblebee, noting all differences. 



2. Note, especially, the tongue. Draw. 



3. Draw the larva. The pupa. AVhat kind of 

 metamorphosis has the wasp? 



4. The sting is more easily studied than that of 

 thd: bee. Draw. 



5. Study and describe the wasp's nest. The mud 

 dauber's nest. 



Mici'os«<>i)!C Objects. 



Near tlie ]tr)u\ 

 maxillary ifal[ii 



The toiiLjue «( tlie bee i-s 

 a slender, hairy organ. It 

 consists of a slender carti- 

 laginous rod and a muscular 

 sheath. The sheath is 

 merely folded around the 

 rod, and is not .joined at tlie 

 ed.ges. 



The laliial palpi are recog- 

 nized by bein,g segmented. 

 T\V(j short se,gments at the 

 tip, one longer segment 

 ne.xt, and then a, still longer 

 .segment constituting the 

 principal part of theiialpus. 



The maxilla' are broader 

 and flatter than the palpi. 

 • i' the iiKi-Kilhe can be seen the rudiments of the 



