S. Mahunka szerk.: Folia Entomologica Hungarica 58. (Budapest, 1997)

ROVARTANI KÖZLEMÉNYEK LVIII 1997 pp. 101-104 A new species of Friesea (Collembola: Neanuridae) from the Caucasus J. G. Palacios-Vargas and Gy. Traser A new species of Friesea (Collembola: Neanuridae) from (he Caucasus - A new species, Friesea laszloi sp. n. from Russia is described and illustrated. It is close to Friesea deccmoculata and F. decipiens. A key for the identification of species with 5 pairs of eyes is given. Most of the species of Friesea show a great diversity in their morphology. The only characteristics that can be considered as really constant and of generic value are the maxilla, the labial chaetotaxy and the sensilla of antennái segment IV. All the other morphological characters can vary, depending on the species, as the number of spines, development of the furcula, number of tenent hairs and the number of eyes. Possibly the number of eyes is one of the least variable characteristics. Few species show a reduction in the number of eyes. It is very common to find species with 8 pairs of eyes (about 70) but there are few species with other combinations. As far as is known, mainly 5 + 5, or 2 + 2 and only 6 with no eyes. The new species here described has the combination of 5 + 5 eyes and 3 anal spines. Friesea laszloi sp. n. (Figs 1-9) Length (n = 10): 0.46 (range 0.42-0.53) mm. Colour grey blue, dorsally darker and ventrally paler. Fine granulation. Eye patches black. Body with short setae (6-15 pm), and acuminate sensorial setae much longer (25 pm). Antenna! segment I with 7 dorsal setae (Fig. 3). Antennái segment II with a verticil of 10 setae. Sensorial organ on antennái segment III, as typical, with 2 microsensilla, 2 guard sensilla (ventral is longer and "s" shaped), and 1 ventral microsensillum. Antennái segment IV fused dorsally with III. Apical bulb simple, 6 sensilla, 1 microsensillum and 1 subapical sensory organ (Fig. 3). Ventral surface of antennái segment IV without any modified setae (Fig. 4). Labial chaetotaxy normal as illustrated by Massoud (1967) and Palacios-Vargas (1986). Ratio of head and antennae as 1 :0.65. Ratio of antennái segments I and II; 111

—IV as 1:0.8; 1.8. Five + five eyes, each about 4 pm. Maxillae with triangular capitulum, with a clear lamella bearing 4 teeth (Fig. 5). Mandible with 7 teeth (Fig. 6). Cephalic and body chaetotaxy is shown in Fig. 1. Tibiotarsi I, II, III with 18, 18, 17 no capitate setae. Figure 7 shows the setal position on tibiotarsus III (after Fjellberg 1990 system). Unguis without teeth. Furcula reduced to state 2 (sensu Massoud 1967), with 3 setae (Fig. 8). Tenaculum with 2 teeth. Thoracical