HOW TO KNOW THE INSEQS 



are housed In duct-tight, pest-proor steel cabinets, holding two 

 rows or 48 cases in each cabinet. 



Each species of insect known to occur in the state has a 

 record card (Fig. 247) on which its distribution by counties and 

 months is marked. The records come from the specimens in the 

 Survey collection and from the apparently reliable lists of Iowa 

 insects. Different characters are employed to show the source 

 of the Information thus marked on the cards.* 



HOW OTHERS MAY HELP 



Entomologists, private collectors, biology and agriculture 

 departments of high schools and junior colleges and others who 

 are interested in seeing the largest possible progress made with 

 this survey of Iowa Insects are Invited to collaborate with it, 

 as many have been doing in the past. Authentic lists of insects 



from any Iowa region are always welcome and 

 useful. Carefully collected specimens in 

 good condition, with locality and date 

 records, are desired from all parts of the 

 state. Even a few specimens are appreciated. 

 Large numbers will help that much more. As 

 far as time will permit, the Survey is glad 

 to furnish identifications of Insects sent in. 

 It is a particular pleasure to help high 

 schools, and teachers or students may feel 

 free to write at any time. 



Correspondence with specialists making a 

 study of or revising a group is invited . 

 Duplicates are gladly shared with specialists 

 who thus make determinations. 



Accurate measurements play "an important 

 part in insect identification. A rule is 

 printed here for the help of those v7ho may 

 not have one at hand. 



* Scao Eeohods of Labelling and Housing Large Insect Collec-Uions, H. E. Jaques, 

 Canadian Entoiaologist, Jan, 1936, 



116 



