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 Ciampa arietaria Guenée (Figs 176–183) ( type species) Oviposition 4♀ Code nos.: G261, G274, G281, G427. Period of oviposition: 23 Apr.–28 May. Batch size: 31.6 ± 8.7 (n = 5) Mean realised fecundity: 39.5 ± 13.7 Incubation time (days): 24–32 (on moistening) Batch configuration and attachment : Attached, singly, small groups or clusters. Colour : Glistening pearly white to pale green, becoming dark brown (Fig. 176). Size (mm): (n=13) L =0.73 ± 0.02, W=0.52 ± 0.01, T=0.43 ± 0.01 Width/length: 0.72 No. of females: 3 Aeropylar opening size (m) (n=6): L=1.3 ± 0.21, W=1.0 ± 0.10 Relative aeropylar opening size: 1.8 Micropyles : Indistinct (Figs 177 & 178) No. of openings: 5 No. of cells in rosette: 9 No. of rows of cells in micropylar area: 4 Shape: Narrow, elongate, sub­cuboidal, anterior pole truncated, slightly wider than posterior, polar profile sub­rectangular, dorso­ventrally flattened (Figs 176, 177, 179 & 180). Characteristics : Egg unmarked apart from hexagonal cells with flat floors, aeropyles only visible on and around anterior pole. Cell walls narrow, slightly elevated in micropylar area (Figs 177, 179 & 180). Cells surrounding micropylar area outlined only by aeropyles (Fig. 177), aeropyles slightly elevated, aeropyle openings of irregular shape, small (Figs 177, 181 & 182). Chorion shallowly, sparsely ridged on middle of top of egg (Figs 181 & 182), granulated or blistered on anterior pole (Fig. 183).