August. "09] JOURNAL OF ECONOMIC ENTOMOLOGY 267 



be placed the duty and responsibility of investigation relating to 

 the questions under consideration, men who are not only equipped 

 entomologically, but who also have a knowledge of certain diseases 

 and of the pathogenic organisms to be dealt with, and the laboratory 

 methods involved. Therefore in developing the subject of medical 

 entomology it has been my aim to construct the work from this view- 

 point. That this conception seems to have met with favor by phy- 

 sicians and veterinarians is evident from the many opinions already 

 voiced in many parts of this state and elsewhere. 



Health officers and supervisors of hygiene have already recognized 

 the value of such special training, and are freely calling on our de- 

 partment for aid and advice. 



Methods 



In teaching this subject, much careful attention should be devoted 

 to the study of insect mouthparts, upon knowledge of which rests 

 the proper interpretation of disease transmission. Enough atten- 

 tention must be paid to general structure to aid in classification. In- 

 ternal anatomy should deal principallj^ with the organs of digestion, 

 including the salivary glands and canals. Usually the latter phase 

 can be dealt with in specific cases. The importance of this knowledge 

 should be impressed upon the mind of the student at once, and this 

 can be made more "weighty by calling attention to the widely different 

 mouth structure of two closely related Diptera, — the housefly and 

 the stable fly — consequently differing widely in their powers of disease 

 transmission. By judicious lectures and demonstration covering two 

 periods the contradistinction between bacteria and protozoa may be 

 impressed. The various insects to be discussed may be conveniently 

 taken up in the usual systematic order. It has been my plan to dis- 

 cuss family characteristics and follow this by a sub-topic, for example, 

 "jMosquitoes and ]\Ialaria," treating the matter under several head- 

 ings, viz.: Historical. "What Is IMalaria ? What is the Pathogenic 

 Organism — Its Life History? How Transmitted? Characteristics of 

 Anopheles, Life History and Habits, Methods of Control. Thus, with 

 necessary deviation, the list of disease-transmitting insects, including 

 other insect and arachnid, parasites of man and domesticated ani- 

 mals may be considered. It is planned to segregate the subject-mat- 

 ter into two divisions, the medical and the veterinary, and thus we 

 are better able to devote more attention to each subdivision. The 

 aim of our work should never be lost sight of, — the control of disease- 

 transmitting insects. 



In the laboratory the insect should be studied from all possible view- 



