224 NATURE STUDY REVIEW [8 :6— Sept., 1912 



In pinning specimens, the following directions are suggested : 



(1). Use regular insect pins (preferably the Japanned pins) 

 usually of size No. 2 or 3. 



(2). If possible pin the insects shortly after killing them. 



(3). Pin uniformly so that one-fourth the length of the pin 

 extends above the insect. 



(4). Pin Beetles through the right wing cover about one- 

 fourth of the distance back from the base. Pin other water in- 

 sects through the middle of the thorax. 



(5). Put small date and locality labels on the pin of each 

 insect. 



(6). Store in a tight box which has the bottom lined with 

 cork or some good substitute. 



For preserving Larvae and Nymphs, the following brief 

 general instructions are recommended : 



(1). Preserve in 75-85 per cent alcohol or in 4 per cent 

 formalin, in vials of appropriate length and diameter. Alcohol, 

 formalin, and vials can be obtained from any druggist. 



(2). A small neat label should be put either on the outside 

 or inside of each vial on which should be written the name of the 

 specimen, date of capture, locality of capture, and a number which 

 refers to the field notes. If the label is to be put inside of the 

 vial be sure that the label is written with pencil on white paper. 



COXCLUSIOX. 



It is scarcely necessary to call attention to the fact that these 

 articles on Pond and Stream Insects have been in no wise ex- 

 haustive. In fact they represent only the smallest beginning of 

 the study of this great field of animal life. The insects which 

 have been referrred to are only a few of the common forms se- 

 lected from the large number of fresh water species because their 

 size, wide distribution, abundance, and ease of observation and 

 collection make them suitable material for the beginner. The 

 diligent youth who finds interest in this work will discover that 

 as his knowledge of aquatic life increases the wider does the re- 

 maining field of the unknown become. He will constantly be 

 meeting new forms, new modes of behavior, new activities, all of 

 which are rich in interest but much of which may of necessity 

 remain hidden, at least for a time, and it is well that it is so. 

 The writer agrees with those who hold that it is important that 

 the pupil should be brought to realize to some extent the wide 

 scope of any liiological subject which is being studied ; that the 

 realization of outlying territory of unexplored matter gives a 



