56 Annals Entomological Society of America [Vol.11, 



12. In each ganglion, especially the abdominal, the central 

 area on each side is well marked by a dense tuft of minute trach- 

 eoles. 



13. The large, and especially the small branches from one 

 system cross over to the regions of other systems to a marked 

 degree. 



14. Although minute tracheoles are long and fine, no anasto- 

 mosis could be demonstrated. 



15. Within certain limits the tracheal supply is- regular and 

 constant. 



16. The tracheae supplying the ganglia are rather directly 

 connected with the larger tubes, not far from spiracles in the up- 

 per region and very close to gills in most of the abdominal region. 



Comstock, J. H., and Kellogg, V. L., '95. The Elements of Insect Anatomy. 



Ithaca, N. Y. 

 Hammar, A. G., '08. On the Nervous System of the Larva of Corydalis cor- 



nuta L. Annals of the Ent. Soc. of America. Vol. I, No. 2, p. 105. 

 Krauss, W. C, '84. On the Nervous System of the Head of the Larva of Cory- 



dahs cornuta L. Psyche, P. 160. PI. II. 



I have especially to thank Prof. Kingsbury of the Department 

 of Histology, of Cornell University, and the Department of Ento- 

 mology of the same institution, for suggestions in the prepara- 

 tion of this paper. 



From the Department of Histology and Embryology, 

 Cornell University, Ithaca, N. Y. 



