172 



CARRIE I. WOOLSEY. 



break apart at the constriction and each cell receives one V. 

 This splits longitudinally in the next division so that each 

 spermatid carries one V multiple. 



/. unicolor contains thirty-one rods and the two multiples. 

 If we accept what has apparently taken place in the previous 

 cases, we can now say the V multiples are composed of four rods 

 which will make the number for the individual thirty-five. 



It seems evident then, that the ten individuals, representatives 

 of three distinct species, contain a uniform number of chromo- 

 somes regardless of the fact that their behavior differs by the 

 appearance of multiples in two specimens and a transitional 

 form containing associated rods, not yet forming a V, in one 

 individual. 



Tabulated Results. 



Although I made my drawings by the aid of a camera lucida 

 I determined the series of size relations from the slide as well as 

 from the drawing, comparing and judging as accurately as I 

 could the graded pairs. As a result of this study, I believe it is 

 the same 14-16 pair that we find associated in the individuals 

 described, Nos. 588, 503, and 560. Just what significance this 

 may have upon the life processes of these grasshoppers I can not 

 say. As to outer body characters, there is nothing to indicate a 

 variation from those of the simple rod type. 



There is still another interesting association in this material 

 that I feel should be noted here. In the cases where a multiple 

 is present, it is more or less closely attended by the extremely 

 large accessory chromosome. In the No. 503 material, this 



