10 BULLETIN 833, U. S. DEPARTMENT OF AGRICULTURE. 
where the terminal growth has been badly distorted previously as a 
result of their work. Females have been noted to return to such 
plants from which they have emerged and deposit eggs thereon. 
Even though they were repeatedly disturbed, they would return 
quickly and continue deposition. On many occasions it was found 
that when these young tips were separated and examined, the eggs 
would be present in greater numbers between the folds of the new tissue 
than on the neighboring exposed surfaces. 
Incubation.—Observations, as given in Table II, show that the in- 
cubation period varies from 3 to 16 days. ‘The time of incubation 
may be affected by the season of the year. 
TaBLe II.—Length of egg period. 
| De- 
; + | Number 
Cage. Host plant. | posited. Hatched. Pens deposited. 
le BASU Days. | 
TaiROCtobeRrOstemer steer eee ee eee ee fics Opeth ls 0) ery Ae ec ee 5 | No records. 
2h: Snow) Q Ween asses. . sees eases ease Be AD gr Si pA Disc. Soo eee 5 | Do. 
STE SILVER Wied GING. 2 ss eee e ae ee PACTS m4 3 SoA en Goa oes yee ee Gy] Do. 
AN GoldensGil ows estes eas esean e Apr br) Apr LOin cen 2 ease soo 5 5 | Do. 
ADA VAG ete 2 ot en ec ee mene en ADE | Os ADEs beset See aan 5 | Do. 
6 lekisanath 24 ase 35-8 ye Fee ee eee Apr. 7 | D8) 0) gl Ves a ee 5 | Do. 
1s |FONOW Queen eee ac neee aoe eee ADT Ee tO S| PATE SAL se ce ae ee ee 5 | Do. 
§)|GMOnTOViasscessces ee. aa eee eee By desea! 24 2 9) cy PE Re ee ee 5 | Do. 
9) Martha Saunderses ges. 2 ance eee AES 1S Apri ak sess naar a Do. 
104| «<GoldsGhadwitk 22.5 45see5: eee ee eee Apr 316; | pApES2I Sse aa ee GF Do. 
ial can ats ys ara coe ae cee nie [Apres tde| pA Die 2oeese Sane eee 5 Do. 
POs la MonnOwilass cel oes see eee eee |. ADE 53 20:4 Apr. 20.5 oe t aa ee ae 5 Do. 
| 1918 
13)) (Silver, Wedding:..@cv. 2. gts ose pierre | 8G sa: eons eeecsiets 8-9| Do 
1 | peat CG alga A pectic BB atari sh > Keli bia a aes Cone 1) 5 sly Piers a ee eran 6 | Do. 
GP secs GOs Oe aac en ae Se eee Rebel p2ilkee dO S422 he 5 | 25 eggs. 
1 dbyol id DY esa) Da aS) Oe ako Lee ee oe Sena in he Bebo tt | Bebe t5—19-- eee 4-8 | No records. 
£70 | BOM PON? 4) Se ons eee et eS ee | Keb. 28+|¢Mar. 622.52 2.)4 4 eee 6 Do. 
TSR OULV ei Wied GING cen seen eee eee | Mar tal Mare G= (Olsen ae 5-9 | Do. 
19} De: Emenehard’: . po.cek- eases = oh 8 |. Mar.) ¢4s)) Mar 9. 2. sscne8 3-2. 5 | Do. 
203 SDE: OOM sen = oo cena cece ce ee ee ee eA == 208 SCD il One eee re 11 | 34 eggs. 
Jie Masaka N. MeLuckie--4 35s: --2-¢ eee Aue: 27 | Aug. 30 Hea Soran ae | 19 eggs 
22 \eMarvaret OISSCbess a. ene ere | Aug S 295 (Sept. 46 tts eae oa 6-16 | 5 eggs. 
Dal) SilverpVied dinieinies ose ee aa yee do: =.24| Septahass ste ee 8 | 20 eggs. 
QE SMWensascctae © sent. en oe ge ere eedOn ees I Septe G- bt eee 8-16 | 24 eggs 
Da laSilve4nr Weddings: s25 S555. eee coe | Sept. 5 | Sept. 10-14...........- 5-9 | 25 eggs 
20; | Golden Wed Ging sere nee Dept. Jia) SCPha 245 55 ce eee 3 | 135 eggs. 
Development.—The development of the larva within the egg can be 
made out easily. In the newly laid egg the nucleus, which is reddish 
in color, is rather central, but shows a slight tendency to be located 
toward the anterior end. There are approximately 18 yolk bodies 
present which are arranged in a row of 9 on each side. Therowsdo 
not extend quite to the posterior end of the egg. As development 
proceeds the red pigment or nucleus moves to one side of the egg, 
which later is apparently the ventral surface. In the meantime the 
yolk bodies collect in a mass near the nucleus. Ateach end the small 
air spaces, which at first are relatively small, later become much in- 
creased in size. The segmentation then begins to appear, with a 
simultaneous contraction of the entire contents. A redistribution of 
