author's abstract of this paper issued 

 by the bibliographic service, november 10 



OBSERVATIONS ON THE EMBRYONIC DEVELOPMENT 

 OF THE MANTID PARATENODERA SINENSIS^ 



HAROLD R. HAGAN 



TWO TEXT FIGURES AKD THREE PLATES 



While engaged in the study of the general embryology of 

 insects I became interested in a peculiar dorsal organ and the 

 method of revolution of the large imported mantis, Paratenodera 

 sinensis Sauss. There are many other interesting factors in 

 the development of this insect which must be passed over in 

 the present paper. 



My sincere thanks are due to Prof. W. M. Wheeler, under 

 whose direction this work was prepared, for his many helpful 

 suggestions and his criticism of the text. I am also indebted 

 to the kindness of Prof. C. T. Brues for aid in securing the 

 illustrations. 



The ootheca is deposited in September, the insect hatching 

 the following spring. The construction of the ootheca and the 

 emplacement of the eggs are similar to those of Mantis religiosa 

 so well described by Giardina ('97-'00). 



The earliest development of P. sinensis unfortunately cannot 

 be presented at this time as the material was secured from Phila- 

 delphia through the mails and when received several days had 

 elapsed between oviposition and laboratory treatment of the 

 first oothecae. It is probable that the very earliest stages 

 are quite similar to those of M. religiosa described by Graber 

 ('90) and Giardina (976). The latter especially has considered 

 at length the very earliest stages including the fertilization of the 

 egg, oviposition, cleavage and the formation of the ventral 

 plate. My material covers succeeding stages. 



1 Contributions from the Entomological Laboratory of the Bussy Institution, 

 Harvard University, No. 132. 



223 



