S. Mahunka szerk.: Folia Entomologica Hungarica 31/2. (Budapest, 1978)

Eyes large, about as long as first antennái joint, or a little longer. Antennae 12-jointed: first small, shorter than distance between antennái bases. Postfrontal and coronal sutures absent. Pronotum a little longer than broad; lateral margins almost parallel; posterior margin rounded. Tegmina and wings absent; lateral keels of mesonotum well visible. Legs unicolourous, yellow. Abdomen strongly punctured, oval; typical; ultimate tergite simple. Forceps Ctenisolabis-type, fang-shaped, curved and pointed at apex. Genitalia unknown. Female very similar to male. Length of body with forceps: 9-9.5 mm, female: 9.5- 10 mm. Distribution: Costa Rica. Ctenisolabis fernandezi (BorelR, 1909) Brachylabis fernandezi BoreRi, 1909, Boll. Mus. Zool. Anat. comp. Univ. Torino, 24, No. 611: 3. - Terra typica: Costa Rica. - Type male: Museo ed Istituto di Zoologica Sistematica dell Universita di Torino, Italy. - Ctenisolabis fernandezi (BorelR, 1909); Burr, 1911, Genera Insectorum, 122: 42. - Isolabis montana (BorelR, 1909); Popham and Brindle, 1966, Entomologist, 99: 245. - Ctenisolabis montana (BoreRi, 1909); Steinmann, Ann. Hist. nat. Mus. Nat. Hung. , 69:96. Figs. 1-3: Male genital apparatus of 1= Ctenisolabis fernandezi (Borelli, 1909), 2- C. mahunkai sp. nov., and 3= C. punctata (Dubrony, 1879) Male colour brown, Rght brown to reddish brown, except black femora. Head a Rttle longer than broad, and about as wide as anterior margin of pronotum. Eyes large, about as long as first antennái joint. Antennae 13-jointed; first joint about as long as distance between antennái bases. Postfrontal and coronal sutures absent. Pronotum longer than broad; lateral margins convex, the plate widened to posterior margin, rounded at angles. Tegmina and wings absent, mesonotum with very well visible lateral keels. Femora black, except apex. Abdomen relatively short, about as long as hind legs. Ultimate tergite broad, posterior margin with two tubercles. Forceps Ctenisolabistype, fang-shaped; tapering, pointed at apex. Genitalia (Fig. 1) specific; paramere broad, incision of anterior margin of paramere deep and narrow; genital lobes well developed, virga straight. External parameres relatively short, pointed at apex. Female unknown.