348 ILLINOIS ACADEMY OF SCIENCE 



and other aquatic hemiptera by Mr. J. R. de la Torre Bueno, 

 lead one to feel confident that the organs described above, in 

 Benacus, and Notonecta, as well, are respiratory in function, 



(Paper illustrated by lantern slide, showing structures men- 

 tioned. ) 



A MORPHOLOGICAL STUDY OF THE HEAD AND 

 MOUTH-PARTS OF THE BLOW-FLY 



ABSTRACT 

 ALVAH PETERSON, UNIVERSITY OF ILLINOIS 



In order to reach a correct interpretation of the head and 

 mouth-parts of the highly specialized Muscidae it is neces- 

 sary to study the more generalized Diptera. At present such 

 a study is being made. So far I have been able to secure rep- 

 resentatives of thirty-eight families out of sixty-one listed by 

 Williston. As a result of the observations on the forms thus 

 far studied, a number of interesting relationships with respect 

 to the mouth-parts have been worked out. When all the ob- 

 servations which I propose to make have been recorded, I feel 

 quite sure that a number of the different points in the inter- 

 pretation of the mouth-parts of the higher Muscidae (Blow- 

 fly) will be made clear. 



PUPAE OF THE LEPIDOPTEROUS FAMILY 

 SPHINGIDAE 



EDNA MOSHER, UNIVERSITY OF ILLINOIS 



The pupae of the family in Sphingidae belong to the so- 

 called obtect type of pupa in which the appendages are firmly 

 soldered to each other and to the body. 



They retain, however, one very primitive character, the pres- 

 ence of a portion of the first femur between the maxillae and 

 the remaining portions of the first leg. 



By .far the most interesting thing about these pupae is the 

 way in which they provide for the very long maxillae which 

 are present in most of the sub-families. The body is strongly 

 curved on the ventral surface, and the labrum is found on 

 the dorsal surface of the head in many instances, thus allow- 

 ing for considerable extra length. Others have a prominent 



