Examples of Pupils' Work 175 



larvae, for I have not attempted to make a minute study 

 of any particular part. It might be well to say, just here, 

 that this paper is written with the purpose of setting forth 

 the results of my general observations upon this subject. 



After about eight days the sleeping pupa began to show 

 signs of life, drawing up its body if touched; its color 

 had changed from white to brown; and metamorphosis 

 had advanced to the stage shown in Figs. 9, 10, and n. 



At the expiration of four or five days more the change 

 was complete, and the imago or adult came forth. It is, 

 on the average, a little less than one-fourth of an inch in 

 length, and gray in color (Fig. 12). 



In this drawing of the insect the following characteristics 

 can be seen: 



I. The head: 



1. Antennae or feelers. 



2. Pon-pon or tuft (silvery white hairs). 



3. Compound eyes. 



4. Mouth parts. 

 II. The thorax: 



1. First segment or pro thorax. 



a. First pair of legs. 



2. Second segment or mesothorax. 



a. Second pair of middle legs. 



b. First pair of wings (gray and netted). 



3. Third segment or meta thorax. 



a. Pair of hind legs. 



b. Second pair of wings. 

 III. The abdomen: 



a. Ten segments covered with silvery white 



scales. 



b. Ovipositor. 



XVII. The Biology of the Paramecium. By F. T. 



(Outline supplied by the teacher.) 



1. INTRODUCTION. 0, Classification; b, habitat in nature; 

 c, how cultivated, etc. 



2. MORPHOLOGY, a, Form, size, and general appearance; 

 b, appendages; c t organization, etc. 



