As type species I. kosswigi of type genus Isolaboides is synonym of Isolabella graeca this makes need of revision of this subfamily.

I think Parisolabis renschi Günther, 1932 was never transferred from Parisolabis genus, althouth it was mentioned by Hincks that 'P. renschi Günther, 1932, from Java, may also belong to
this genus but so far no material has been available for study'. We cannot transfer it until holotype is not investigated (or neotype designated and compared if original has been lost). May be

All two members of Paralaboides genus has been synonymized with Isolaboides immsi.

My notes to this:

Original species Pseudisolabis kosswigi Burr, 1947 was designated as the type genus of Isolaboides Hincks, 1958 genus and received name of Isolaboides kosswigi (Hincks, 1947), and he also synonymized Pseudisolabis Burr, 1908 (type species P. walkeri) with Parisolabis Verhoeff, 1904 (type species P. novaezeelandiae) making Pseudisolabis as invalid taxon.

Harz in 1975 synonymized with Isolabella graeca Verhoeff, 1902 based on the study of very damaged holotype (missing abdomen as he mentioned).

Harz apparently overlooked Hincks publication in 1958 as in his article he synonymized Pseudisolabis kosswigi with Isolabella graeca as junior synonym and also wrote that Isolabella Verhoeff, 1902 is ‘to be considered a valid taxon before Pseudisolabis Burr 1908’.

Later in 1976 Harz and Kaltenbach mentioned synonymy of Isolabella, Pseudisolabis and Isolaboides in his publication.Page 47 citation:
'Gattung/Genus: Isolabella VERHOEFF 1902 (Verh. SB. Ges. Naturforsch. Freunde, Berlin, p. 15-16; typus generis: I. graeca VERHOEFF 1902; Pseudisolabis BURR 1908 part., Isolaboides HINCKS 1966)'.
Isolabella was placed under Parisolabinae there and mentioned '3 species in
India, Libanon, and Turkey' without listing them (I guess they meant Pseudoisolabis burri and P. tuberculata which were listed in Hincks 1958).

In 1983 Steinmann re-described holotype of Isolabella graeca but did not clarified taxonomic position (just wote as doubtful to belong to Chelisochidae) and referred to Harz and Kaltenbach 1976 without mentioning synonymy proposed by Harz. In Steinmann 1989a he placed Isolabella under Labiinae.

That means that species Isolaboides kosswigi is the type of genus Isolaboides but now Isolaboides has a parent outside of Isolaboides.
But Harz 1975 synonymy was overlooked by Brindle, Steinmann and Srivastava, they continued to assign species to the genus and even established a subfamily.

There are currently 4 other Isolaboides species, 2 of them assigned after Harz 1975:
Isolaboides rimosa Steinmann, 1983 assigned to Isolaboides by Steinmann 1983
Isolaboides immsi (Burr, 1913) assigned to Isolaboides by Srivastava 1996
Isolaboides burri (Borelli, 1909) assigned to Isolaboides by Hincks 1958
Isolaboides tuberculata Hincks, 1958 assigned to Isolaboides by Hincks 1958
Subfamily Isolaboidinae Brindle, 1978 (type genus – Isolaboides) established within Spongiphoridae in Brindle 1978, but listed under Anisolabididae in Srivastava 1996 (and later in Srivastava 2003 and all publications by Srivastava and Indian specialists also).
Genus Paralaboides Steinmann, 1989 (type species – Pseudisolabis jonathani Kapoor & Katiyar, 1971) was erected for P. jonathani and P. santokhi, both of them was later synonymized Srivastava 1996 with Isolaboides immsi making Paralaboides synonym of Isolaboides.

Species Isolabella graeca was assigned to its own subfamily Isolabellinae Verhoeff, 1902 then moved by Steinmann 1989a to Labiinae Burr, 1909, it was never placed under Isolaboidinae.

In general, overlooking of publication of Harz 1975 and ignoring of synonymy mentioned in Harz and Kaltenbach 1976 (source was cited by Steinmann fro I. graeca but not for I. kosswigi) went to discrepancy in taxonomy for the genus and subfamily.

Literature:
Burr 1947: Burr, M. (1947) Two new species of Dermaptera from Turkey. Proceedings of the Royal entomological Society of London (B), 16, 60–65. (I do not have PDF)
Hincks 1958: Hincks, W.D. (1958) Some notes on Parisolabinae (Dermaptera). EOS Revista Española de Entomologia, 34, 131–134.
Harz 1975: Harz, K. (1975) New Orthopteran species and sub-species from the Palearctic. Articulata, 1(2), 5–16. [in German]
Brindle 1978: Brindle, A. (1978) Dermaptera from Kashmir and Ladakh. (Insecta). Senckenbergiana biologica, 58(3-4), 203–209. (I do not have PDF)
Harz and Kaltenbach 1976: Harz, K. & Kaltenbach, A. (1976) Die Orthopteren Europas III. Dr. W. Junk B. V. In Die Orthopteren Europas III. Dr. W. Junk B. V., The Hague. Vol. 3, 1–434 pp.
Steinmann 1983: Steinmann, H. (1983) A study of the higher taxa of the Chelisochidae (Dermaptera). Annales Historico-Naturales Musei Nationalis Hungarici, 75, 139–144.
Steinmann 1989a: Steinmann, H. (1989a) Dermaptera. Eudermaptera I. Das Tierreich, Supplement No. 106, 1–558.
Srivastava 1996: Srivastava, G.K. (1996) Notes on Isolaboidinae (Insecta: Dermaptera: Anisolabididae) from the Indian subcontinent. Records of the Zoological Survey of India, 95(3-4), 147–159. https://doi.org/10.26515/rzsi/v95/i3-4/1996/160295
Srivastava 2003: Srivastava, G. (2003) Dermaptera. Part 2: Superfamily Anisolabididae. The Fauna of India and adjacent countries, 235 pp.