CHROMOSOMES IN COREID HEMIPTERA. 



IO5 



3. Chelinidea vittigera. 



Tin- i-mlir\onic groups of this species are very similar to those 

 Ml" A>i<i 'i and equally favorable for making chromosome counts. 

 The embryos are again of two sorts, one having 21 chromosomes, 

 i lit- other 22. In fact the number and size-relations are so much 

 like tlio-t.- in Anasa that the two forms cannot be distinguished 

 ;h( ir i hroniosome complexes alone. 





Pic UniJeo vittigera. Chromosome-groups of embryonic cells. o-/z. 



8IH hromosome type; 6. c, d. e and /.'from the same embryo; o. from an early 

 onal group with twenty-two chromosomes. 



