The Peach-Tbee Borer. 173 



and fifth segments thus banded. Rarely a specimen is found with 

 the fourth segment and a few scales on the sides of the fifth seg- 

 ment of an orange color, as shown at i.f. in figure, thus forming a 

 " connecting link " or intergrade between the typical female {t. f.) 

 and the one shown aty in the same figure. In his original descrip- 

 tion of the female. Say stated that the fifth segment bore this 

 orange band, but his figure shows the foxiTtJi segment orange ; no 

 specimen with only the fifth segment orange has ever been found. 

 We have been unable to find any structural differences between the 

 form with only one segment orange and the one with the orange 

 band on two segments, and the fact that an intergrade {i^f. in figure 

 44) exists, is quite conclusive evidence that they are simply striking 

 variations of the same species. A similar variation occurs in the 

 male of Sannina uroceriformis, persimmon-root borer. 



The fact that all of the scores of females of the peach-tree borer 

 moth which we bred here at Ithaca, N, Y., with the exception of 

 one intergrade form, were likey in figure 44, while all those which 

 were bred on Long Island and New Jersey by Professor Smith, 

 were like t. f. in this figure, led us to make inquiries regarding the 

 geographical distribution of these two forms of the female. The 

 results indicate that the females with only the fourth segment orange 

 are a southern form or geographical race occurring south of latitude 

 40 to 42 degrees, while north of this latitude only the variety or 

 race with the orange band covering the fourth and fifth segments 

 occurs ; the intergrade form {i. f. in figure 44) has been found at 

 Ithaca, N. y., and near New York City. Mr. Beutenmiiller (1899) 

 has recently given the name of edwardsii to this northern form of 

 the female moth. Another variety of the female with only the 

 fourth abdominal segment orange and " the space between the two 

 inner veins of the hind wings is nearly, or quite, covered with blue- 

 black scales, forming a stripe which divides the transparent disc 

 into two parts" was naxae^fitchii by Edwards (1882). 



Prof. J. B. Smith (1898) has illustrated some interesting structural 

 characteristics of the moth of the peach-tree borer. The scaly vesti- 

 ture on different parts of the body and wings present striking dif- 

 ferences in size and character. " At the base of the last segment 

 in the female there is a brush of hair ordinarily lying close to the 



