Homoeusa Kraatz, 1856

Genus Homoeusa Kraatz, 1856 View in CoL

Homoeusa Kraatz, 1856: 76. View in CoL

Myrmobiota Casey, 1893: 594. View in CoL

Soliusa Casey, 1900: 53 View in CoL

Note.

See Nozaki and Maruyama (2022 a) for a detailed synonymic list and the diagnosis of this genus.

Remarks.

No apparent sexual dimorphism other than in the genitalia or terminalia has been reported in this genus. However, based on extensive examination of several species, females were often found to have shorter and denser stout setae on the middle posterior margin of the 8 th sternite than males did (Fig. 9 F, G View Figure 9 ). Moreover, there are more or less interspecific variation in the marginal shape of the 8 th sternite on each sex. Therefore, we provide illustrations and descriptions of this characteristic for all the species, including the well-described species in our previous papers ( Nozaki and Maruyama 2022 a, 2022 b), Homoeusa rufescens and H. ovata .

To measure the antennae, we provided the width and aspect ratio of each segment in the previous paper. However, they usually have elliptical cross-sections, which can cause instability during measurement. Therefore, we provided the relative length of each segment instead.

The males have various parameral apical lobe shapes and arrangements of the four setae across species. Although strict homology is not available for these four setae, for the convenience of a comparative description, we named them as Sawada (1970 b) did for H. prolongata . Each seta typically has the following characteristics in Homoeusa (e. g., Fig. 13 H View Figure 13 ): a, longest and distributed at the most basal position; b, medium in length and distributed dorsally; c, medium in length and distributed ventrally; d, shortest, thinnest, and distributed at the most apical position.