HOMOPTEEA (Continued) 



Species 



Chromosome Number 

 2n n 



Remarks 



Observer 



References 



Crypt icerya rosae 

 Echinicerya anomola 

 Icerya littralis 

 I. monotserratensis 



Icerya purchasi 



I. similis 



Gossyparia spuria 



2s, om 

 4o,om 



o develops 

 from unfer- 

 tilized 

 (parth.)eggs. 

 Chroms . un- 

 reduced in d, 

 while reduc- 

 ed in £ "by 2 

 meiotic divs. 



Hughe s- 



Schrader'30 



a,b. 



J.M. 50; Ann. 

 Entom. Soc. Am. 

 23. 



ks 2^(1,11) 



Uo.m 2o(l,ll) 



^s.o.m 2o N (l) 

 (In herm- 2p(l,ll) 

 aphr.) (In Herm- 



2s, m aphr.) 

 (in true o) 



2s, Im 

 ko, om 



2^(1) 



28s, om 14f 76^(1) 

 28 om l4o_(l,ll) 



Pierantoni 

 '12, 'l^ 



Hugh e s- 

 Schrader'25, 

 '26, '27; 

 Hughe s- 

 Schrader & 

 Schrader 

 '26; Hughes- 

 Schrader *U8 



Fertilized 

 eggs give 

 rise to 

 hermaphro- 

 dites. 

 Males al- 

 ways hap- 

 loid, de- 

 velop from 

 unf ert. 

 (parth . ) 

 eggs of 

 hermaphr. 

 chroms. 

 reduced 

 in ovary 

 of hermaphr. 

 "by 2 meiotic 

 dlvs. .while 

 a single 

 equational 

 div. occurs 

 in testes 

 of both 

 hermaphr. 

 and true 

 male. From 

 correction 

 of '26 and 

 •27. 



o dev. from Hughes- 

 par th. eggs, Schrader 'W3 

 haploid. 



Arctivio Zool. 

 5,7. 



Z.Z.M.A. 2; Sci. 

 63; Z.Z.M.A. 6. 

 Z.W.Z. 128: Adv. 

 in Genetics, Vol. 2. 



Adv. in Genet. 2. 



7 chroms. 

 behave as 

 a group 

 in t I- 

 div. 



Schrader '29 Z.W.Z. 13^. 



-121- 



