Descriptions of the eggs of some southern Australian Geometridae (Lepidoptera) Author Young, Catherine J. text Zootaxa 2006 2006-08-14 1287 1 294 journal article 1175­5334 7778314F-E23A-4947-876A-9610E4C959A7 Chlorocoma externa Walker (Figs 790–798) Oviposition 2♀ code nos.: G398, G401 Oviposition period: 2 Nov.–20 Dec. Batch size: 10–30; (n = 3) Realised fecundity: 30 Incubation time (days): 6 Batch configuration and attachment : Very loosely attached, singly or in small groups (Fig. 790). Colour: Yellow to yellowish­green, glittering, becoming dark yellow then grey on maturity (Fig. 790). Size (mm) (n=13): L = 0.75 ± 0.01, W = 0.53 ± 0.01, T = 0.38 ± 0.01. Width/length: 0.71 No. of females: 3 Aeropylar opening size (m) (n=5) : L = 1.67 ± 0.13, W = 1.3 ± 0.08. Relative aeropylar opening size: 2.6 Micropyles : Indistinct (Figs 791 & 792) No. of openings: 1 No. of cells in rosette: 7 No. of rows of cells in micropylar area: 5 Shape: Narrow, elongated, compressed dorso­ventrally with narrow flat lateral sides perpendicular to wide flat lateral sides (pill­box shaped), bluntly ovoid from top view (Figs 790, 791 & 793), anterior pole truncated, wedge­shaped laterally (Fig. 794). Characteristics : Egg marked on all surfaces by flat, hexagonal cells with narrow, slightly elevated walls giving a netted appearance (Figs 791–795, 797). Aeropyles conspicuous, elevated, openings moderately small (Fig. 796), in two narrow bands encircling egg longitudinally along upper and lower edges of narrow lateral sides. Rosette cells slightly recessed; micropylar cell walls overlain by very narrow, shallow reticulum (Fig. 792). Chorion rough, generally shallowly wrinkled and pitted (Fig. 797), roughness more pronounced on narrow lateral sides, edges (Figs 796 & 798).