Nipponentomon aureitarsum

Nipponentomon aureitarsum (Ewing, 1940) (Figs. 12–23, Table 2) = Acerentulus aureitarsus Ewing, 1940 Material examined. Holotype, maturus junior (no. 53373) from Difficult Run, Virginia, 4.IX.1938, coll. H.E. Ewing; one maturus junior from near Prospect Hill, Va., 25.IX.1921, coll. H.E. Ewing. Remarks. The species was redescribed by Bonet & Tuxen (1960) and by Tuxen (1964) on the basis of four specimens, one of them a female. I saw only two maturi juniores. Some features, which are not included in previous redescriptions, are added here. Additional description. Labium not protruded (Fig. 12). Head dorsally with a pair of short, stout and blunt setae sd5 (Fig. 14), setae near pseudoculus l3 and sd4 longer and setiform (Figs. 13). Additional cephalic setae d6 absent. Marginal cephalic setae d7 and sd7 equal in length (Fig. 15). Labial palp with tuft of setae, three setae and broad sensillum (Fig. 16). Setae β1 and δ4 on foretarsus modified: β1 short, stout and truncated at the tip, δ4 sensilliform, longer and thinner than β1, but shorter than δ5 seta (Figs. 17, 18). Length ratio of P1: P1a: P2 on mesonotum as 7.0:1.0:9.0. Accessory setae P1a and P2a on nota and all accessory setae on tergites I–VI and sternites IV–VI short, stumpy, truncated on the tip (Fig. 19); on tergite and sternite VII accessory setae setiform (Fig. 20). Setae A2 on prosternum and A1 on metasternum absent but may appear in adults. All setae on thoracic sterna and on sternites I–II setiform. Meso- and metanota with pores al and sl. Meso- and metasterna with one median pore (sam). Pores psm present on tergites I–VII (Fig. 21), psl on tergites V–VII, al on tergites II–VI, but absent on tergite VII (Fig. 22). Sternites IV–VII with sam pore (Fig. 23). Sternites VIII–X with a pore (sc) in the central region. Body measurements (maturus junior, in μm): body length 1400, head 150, pseudoculus 8, distal part of maxillary gland 25, pronotal seta 1 56, pronotal seta 2 20, mesonotal P1 52, mesonotal P1 a 8, mesonotal P2 59, mesonotal P2 a 8; foretarsus 96, claw 35, empodial appendage 5.