October, '13] WEBSTER: GYPONA OCTOLINEATA 411 



The Egg. Eggs of this species were found deposited in the bark of 

 young apple trees, as the following notes from insectary records* 

 show. 



In the spring of 1909 a number of young Jonathan apple trees, sent 

 from Shenandoah, Iowa, were set out in the insectary for experimental 

 use. In the bark of one of these trees were two egg pouches, similar 

 to those figured by Riley (1892) as egg pouches of the Membracid, 

 Ceresa tmirina Fitch, These two eggs hatched, but the nymphs were 

 overlooked until May 31, when they were over half grow^n. Some of 

 these same nymphs were found on other young Jonathan trees in the 

 insectary at this time. The two nymphs from the one tree were kept 

 in a separate cage on a young apple tree, and on June 9 they became 

 adult. The two happened to be male and female, and were found in 

 copulation at this time. The species was then determined as Gypona 

 octolineata, variety flavilineata. 



On June 15 in this cage I found a single egg deposited openly on a 

 leaf, and also a number of egg slits in the bark of the young apple tree. 

 The single egg in the open was apparently accidentally deposited 

 there. This egg was cyhndrical, white, 1.63 mm. long and .32 mm. 

 broad. One end of the egg was slightly more rotund that the other, 

 w^hich tapered a little more. 



These egg slits were, of course, similar to those in the apple bark 

 from which the parent Jassids had come. On subsequent clays in 

 this cage more eggs w^ere deposited, until 34 in all were counted in the 

 bark. These eggs were placed usually at random over the bark; in 

 one instance four were placed in a row, one below the other, and slightly 

 to the left. These last apparently W'Cre deposited at one time. 



On July 3, 18 days after the eggs were first seen, the young nymphs 

 appeared in this cage. These nymphs lived for about two weeks, but 

 finally all of them died, apparently having been killed by some spiders 

 that had gotten into the cage. 



At Shenandoah in the spring of 1908, and again in 1909, I noticed 

 egg pouches similar to those described above, in apple nursery stock 

 in some abundance. This was in the same nursery from which the 

 young Jonathan trees, previously mentioned, had come. The same 

 kind of eggs were also common on Carolina poplar nursery trees, 

 where from 6 to 12 punctures in a row were often found, although 

 from 6 to 9 was the usual number. 



These eggs found at Shenandoah were like those deposited in the 

 apple bark in the insectary, except that there was a black mark present 

 on the egg at the slit. This mark shows on the egg itself, after being 

 dissected from the bark, as well as through the slit in its normal posi- 

 tion. In the eggs deposited in the insectary cage in June, these black 



