First record of the lace bug genus Eritingis (Drake and Ruhoff) (Hemiptera: Heteroptera: Tingidae) from Japan and Thailand

Abstract Background The lace bug genus Eritingis Drake and Ruhoff, 1962 is widely distributed in the Australian and Oriental Regions, whereas only a single species, E. recentis (Drake and Poor, 1937), has been recorded from the Oriental Region. To date, E. recentis is known to occur in Indonesia, Malaysia, Papua New Guinea, Singapore and Vietnam, but has not been recorded from Japan and Thailand. New information Eritingis and E. recentis are recorded from Japan and Thailand for the first time.

Recently, I observed a collection of Tingidae from eastern Asia and found an undetermined species of Eritingis in Japan and Thailand. After careful morphological examination, I concluded that this undetermined species represents E. recentis. In this study, I recorded E. recentis for the first time from Japan and Thailand.

Materials and methods
Dried specimens were used. Morphological characteristics of each specimen were observed under a stereomicroscope (SZ60, Olympus, Tokyo, Japan). Specimens were photographed using a digital microscope (Dino-Lite Premier M, Opto Science, Tokyo, Japan). Distribution records of species were mapped using SimpleMappr (Shorthouse 2010). Geographical coordinates were obtained from Google Map. The terminology used in this study generally follows that of Drake and Ruhoff (1965a) and Schuh and Weirauch (2020). All specimens used for this study were deposited at the Kyushu University Museum, Fukuoka, Japan (KUM).

Diagnosis
Eritingis recentis can be distinguished from other species of Eritingis based on a combination of the following characteristics: body length 3.0-3.2 mm, 3.3 times as long as maximum width across hemelytra (Fig. 1a-d); rostrum reaching anterior margin of metasternum (Fig. 2a); anterior margin of hood protruding anteriad in middle part (Fig.  2b); anterior margin of hemelytron nearly straight (Fig. 2c); costal area distinct, with a single row of areolae throughout its length; subcostal area with 1-2 rows of areolae in basal part and 2 rows in remaining parts; discoidal area with 5-6 rows of areolae at widest part; sutural area with 9 rows of areolae at widest part; and female terminalia pentagonal in ventral view (Fig. 2d).
The discovery of Eritingis recentis from Japan represents the northernmost distributional record of Eritingis species.

Taxon discussion
The above recorded specimens match well with the photographs of the holotype (United States National Museum of Natural History 2021), illustrations (Drake andRuhoff 1962, Drake andRuhoff 1965b) and original description (Drake and Poor 1937a) of Eritingis recentis described from Singapore.
Eritingis recentis is highly similar to E. agyiates in general appearance. The latter is distinguished from the former by the body length 2.7 mm and the rostrum reaching the anterior margin of mesosternum. Collection sites of Eritingis recentis in Japan and Thailand examined in present study.