45 



pany with Mr. A. Koebele and Mr. H. A. Brainard, and we obtained a num- 

 ber of larva and chrysalids, which Mr. Koebele took charge of. In course 

 of a couple of weeks both male and female were developed, and it became 

 plain that this was a different species from the eastern peach borer, and 

 specimens were forwarded by Mr. Koebele to Professor Riley for identifi- 

 cation. 



Under date September 4, 1888, 1 received a communication from Profes- 

 sor Riley, in which he says: " The yEgereid to which you refer I shall de- 

 scribe under the name Sannania pacifica, as it connects through S. exitiosa 

 (eastern peach borer) with S. Fitchi." 



Not having yet received Professor Riley's description, and desirous to 

 give the readers an idea of this important insect, I have described it in a 

 rough way myself. Whence the insect came I can only conjecture, but 

 the supposition is that it is a native insect that has existed on some wild 

 bush and gradually has taken to the peach trees in the neighborhood, ac- 

 cording to the statement of Mr. Leigh, whose orchard has suffered for 

 many years. 



Description. — Larva (Figure No. 27), pale yellow, with brown head; about an inch long, 

 cocoon (Figure No. 28), brown, as all segerias; made up of the castings and glued together; 

 one and one quarter to one and one half inches long. Female (Figure No. 29), fore wings, 

 bluish-black opaque; hind wings, transparent veins; black fringes of both wings dark; 

 antenna?, dark steel-blue; head, thorax, and abdomen of a uniform very dark blue, almost 

 black, the segments marked with a faint blue line; tuft on the abdoiuen jet black; legs 

 black; span of wings, one and one half of an inch. J/aZe (Figure No. 30), fore wings partly 

 transparent, upper margin black, ends black, a dark bar transversely across the veins past 

 tlie veins, past the middle; hind wings transparent; fringes of both wings black; antennae 

 steel blue; head and thorax black; abdomen steel blue, lighter colored on the segments; 

 tuft black; legs black, with yellow tuft of hair on thigh and on tibia; wing span one and 

 one quarter inches. 



Figui e No. 27. Figure No. 28. 



Figure No. 29. Figure No. 30. 



The habits of this insect are similar to those of the eastern peach root 

 borer, yet it differs essentially and in such a manner that it must be con- 

 sidered less dangerous. 



The tunnels of this borer are almost vertical, varying from four to eight 

 inches in depth, by three to four inches in width, and the disposition to 

 girdle the tree does not seem to be so apparent as by the eastern borers. 

 Frequently five or six borers were found which had not girdled the tree 

 yet. Furthermore, it does not seem to work above ground. Its presence 

 w^as noted especially on heavier land, while on ver}^ light, sand}^ soil it was 

 notably absent. Its presence is also invariably indicated b}' copious gum 

 exudations below ground. Its preference is peach roots, 3-et I found in- 

 stances where cherries (Mazzard stock) had been affected. 



