The external morphology of eggs of three Rhopalidae species (Hemiptera: Heteroptera) with a review of the eggs of this family Author Vilímová, Jitka Author Rohanová, Markéta text Acta Entomologica Musei Nationalis Pragae 2010 2010-06-30 50 1 75 95 journal article 10.5281/zenodo.5324086 0374-1036 5324086 Brachycarenus tigrinus (Schilling, 1829) ( Figs. 11–16 ) Egg is elongated, rounded, more slender than eggs of Ch. schillingi and R. maculatus . Dorsal side is slightly convex, wide, without attachment stalk. Lateral sides are only slightly sunken longitudinally. Ventral side is narrower than dorsal, merging continuously into lateral sides without any special structures, such as longitudinal ribs. In hatching, the larva forces off the pseudoperculum at anterior egg pole. Pseudoperculum is almost circular, slightly flattened and separated from surrounding chorion by pale low ridge of different structure. Chorion of this ridge with only fine tubercles to almost smooth. Chorion is dull, with distinct low rounded tubercles in regular arrangement, surface between tubercles smooth. Structure of pseudoperculum identical with egg body. Figs. 1–8. Eggs of Chorosoma schillingi (Schilling, 1829) . 1 – whole egg, ventral view; 2 – whole egg, lateral view; 3 – anterior pole of egg, lateral view; 4 – anterior pole of egg, ventral view; 5 – empty egg with separated pseudoperculum, ventral view; 6 – detail of chorion surface pattern, pseudoperculum; 7 – detail of chorion surface pattern, egg body; 8 – detail of adhesive stalk on dorsal side, lateral view. Scale = 100 μm for Figs. 1–5; 10 μm for Figs. 6–8. Letterings: c – cap; m1, m2 – micropylar processes; p – pseudoperculum; r – ridge separating pseudoperculum from surrounding chorion; s – attachment stalk. Figs. 9–10. Eggs of Chorosoma schillingi (Schilling, 1829) . 9 – apex of micropylar process, most exposed view; 10 – cuticular cap of hatched larva attached to empty egg, with egg burster, most exposed view. Scale = 100 μm for Fig. 10; 10 μm for Fig. 9. Letterings: b – egg burster; o – opening of micropylar process. Two micropylar processes are in longitudinal egg axis, one is on pseudoperculum close to the anterior egg pole, the other on dorsal side close to pseudoperculum and anterior egg pole. Micropyle is shaped as simple bent conical channel with single apical opening, directed dorsoposteriad or ventroposteriad. Entire micropylar process is bent posteriorly and pressed to chorion, thus appearing as a small rounded tubercle. Egg is green after oviposition, becoming dark green-brown. Measurements (in mm): length 1.11 (1.10–1.14), width 0.37 (0.35–0.39).