CECIDOMYID^. 



379 



ceciclomyian larvse, with the division between the segments in- 

 dicated by rows of minute spines. From the germ-balls (a, 

 nearest the posterior end of the body) the embryo is gradually 

 formed (as at a in the eighth and ninth rings of the body), 

 when they assume a cylindrical form like the eggs of the adult 

 fly of this family. These eggs may be compared with the 



riff. 291. 



Fig. 202 



Fiar. "293. 



Fig. 294. Fig. 295. Fig. 296. 



"pseudova" of the Aphis, and are developed from the two 

 large fatty bodies (corpora adiposa) which are situated one on 

 each side of the bod}^ These "false eggs" increase in num- 

 ber and develop until the entire cavity of the mother larva be- 

 comes distended with young worms like itself, and which are 

 finally born and may be compared with the wingless broods of 

 Plant-lice.* 



*Bai-on Osten Sao.ken afterwards abandoned the hypothesis (stated on p. 209) 

 that the females of Cynipids are impregnated by males inhabiting a different sort 

 of gall. See the Proceedings of the Entomological Society of Philadelphia, 1862, 

 p. 249, § 3, Sexes of the Cynipidse. 



