134 Annals Entomological Society of America [Vol. VI, 



The Society then adjourned to meet at 2:00 p. m. when the 

 following business was transacted and papers read : 



The Committee appointed to draft resolutions on the death 

 of Dr. John Behrnhardt Smith presented their report. It was 

 ordered accepted and printed. 



James Zetek, Sanitary Commission Canal Zone: Determin- 

 ing the Flight of Mosquitoes. Read by Title, 



William A. Riley, Cornell University: Some Sources of 

 Laboratory Material for Worlz on the Relation of Insects to 

 Disease. 



The demand for at least elementary courses on the relation of insects 

 to disease brings up the question as to available laboratory material. 

 There is comparatively little difficulty in obtaining the parasitic mites, 

 ticks, lice, house-flies, mosquitoes and fleas in their various stages, but 

 it is usually assumed that most of the pathogenic Protozoa are tropical 

 species and that nothing can be substituted for them in laboratory 

 work. As a matter of fact, a number of insect-borne Protozoa and 

 worms occur in this country and together with other blood parasites 

 whose life-history is less better known, are available for laboratory 

 work. The species discussed were Trypanosoma lewisi a widely dis- 

 tributed parasite of brown rats; Trypanosoma rotator ium from the frog; 

 the related Corithidia from the "sheep tick"; Herpetomonas from the 

 house-fly; Monocystis from the seminal vesicles of the earth worm as 

 introductory to the study of the Haemosporidia ; Lankesterella ranarum 

 Haemogregarina sp.; Proteosoma, Halteridium, Babesia hilaria in the 

 blood of the crow and English sparrow, and Dipylidium caninum, the 

 double-spored tape worm of dogs, cats, and man. 



Discussion: F. L. Washburn — It was asked whether Dr. 

 Riley had ever found acridids killed by the presence of an 

 excessive number of gregarines. Being answered in the nega- 

 tive, it was stated that a party in western Oregon had recently 

 written him of the occurrence of large swarms of locusts in the 

 Willamette valley which did not lay eggs, but perished in large 

 numbers and a microscopical examination disclosed a very 

 large number of gregarines in each insect and the reproductive 

 glands entirely disintegrated. 



, Y. H. Tsoii and S. B. Fr acker, University of Illinois: The 

 Homology of the Body Setce of Lepidopterous LarvcE. 



This paper consisted (1) of a statement of the difficulties involved 

 in homologizing the body setas of these larvae, (2) of a consideration of 

 the serial homology of the setas of the different segments and (3) of the 

 specific homology in the larger groups. Greek letters were employed 

 to designate the setae in order to obviate the confusion which has arisen 

 from the use of numbers in different ways by different authors. The 



