there are nucleocytes 12 p. c, transitional forms 9 p. c, rhegmatocytes 4 p. c. 

 spheroidocytes 1 p. c., granulocytes 4 p. c, naked nuclei and other degener- 

 ative forms about 18 p. с However, when examining the blood picture in 

 short time intervals on individuals of a definite age in the metamorphosis 

 period we can discover significant changes in the composition of peripheral 

 hemolymph characterizable as a degeneration of a substancial part of the blood 

 picture succeeded by a renewal of blood cells (Fig. 2). Thus in the metamorpho- 

 sis period the number of nucleocytes, transitional forms and plasmatocytes 

 decreases detrimental to naked nuclei and other degenerative forms. Soon 

 after the last moulting the number of young cellular forms in the blood picture 

 increases; subsequently, through the gradual differentiation chiefly into 

 plasmatocytes the balance of the blood picture is restaured to the original 

 state. 



Owing to a very low per cent of mitotic cell divisions it can be supposed 

 that the increase of young cell bodies is brought forth by their division and 

 release from the blood-forming organs or by the transition of the so called 

 sedentary hemocytes into circulation. These changes can be put in connection 

 with those in the phagocytary activity about the metamorphosis period. 

 It seems to be confirmed e. g. by the experimsnts with an artif ical parasitization 

 (Janda a. Jirovec) of insects and by the varying results of many authors 

 when studying the resistence of insects againts biological factors. 



In future the work will be aimed first of all at the study of such changes 

 in the blood picture in CDrrelation with the insect development and at the 

 investigation of hemocytes functions. 



LITERATURE 



Ermin R.. 1939, Z. Zellforsch., 29: 613—669. 



Hrdy I., 1959, Acta sec. zool. Bohemoslov., 22: 79—93. 



Janda v., Jirovec O., 1938, Acta soc. zool. BcjhemosJcjv., 5: 34 — 58. 



Larcenko K. I., 1956, Trudy Zoolog iceskovn instituta AN SSSR, 23: 5—214. 



Rooseboom M., 1937, Arch. Néerl. Zool., 2: 432—559. 



Wigglesworth V. В., 1959, An. Rev. Entoînol., 4: 1—16. 



Yeager J. F., 1945, J. Agn'c. Bes., 71: 1—40. 



РЕЗЮМЕ 



Сведения, полученные кариометрней, и статистика нуклеоплазматического индекса 

 указывают на единый ряд развития всех гемоцитов. С точки зрения строения (а частично 

 и функции) были установлены основные типы гемоцитов: нуклсоциты (молодые; элементы) ; 

 плазматоциты (самый мпогочислеиный тип в крови); регматоциты (функционально встре- 



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