Byrsinus setosus, Lis, 2001

Byrsinus setosus n. sp.

(Figs 1­2)

ETYMOLOGY

Named after numerous long setae on body margins.

TYPE MATERIAL

Holotype female: East Indonesia, ins. Flores, 28.VIII.1962, I. Warswskij ( ZMAS) .

DIAGNOSIS

The new species is very similar to Oriental B. varians (F.) in the body outline and sculpture (Figs 1, 3). Nevertheless, it be can easily separated from the latter by its smaller body size (length: 3.22 mm in B. setosus , 3.40­4.46 mm in B. varians ; width: 1.84 mm in B. setosus , 2.08­2.68 mm in B. varians ), conspicuously smaller eyes and ocelli (ocular index: 3.9 in B. setosus , 2.4­3.0 in B. varians ; ocellar index: 7.5 in B. setosus , 4.0­5.0 in B. varians ), and different type of body vestiture (both, hair­like and peg­like setae of B. setosus are clearly longer than those of B. varians ­ Figs 2, 4).

Body castaneous, antero­lateral parts of pronotal disc somewhat darker than its remaining parts, head blackish brown.

Head dorsally finely sparsely punctate, anterior half of clypeus almost impunctate; paraclypei slightly longer than clypeus; the latter somewhat tapering apicad, and with a pair of long and sharply ending subapical peg­like setae; each paraclypeus with a submarginal row of 12­13 setigerous punctures bearing 4 hair­like setae and 8­9 long and sharply ending peg­like setae (Fig. 2); eyes castaneous, each with long and stout apical seta (Fig. 2), ocular index about 3.9; ocelli small, yellowish brown, ocellar index about 7.5; distance between ocelli about 8­10 times distance of ocellus from eye; bucculae low, impunctate; anterior half of gular plate impunctate; rostrum reaching mid coxae.

Pronotum densely punctate, except for callal areas and postero­lateral angles of disc; punctures generally larger than those on head, more crowded and coarser in lateral parts of disc than in its posterior half; umbones moderately swollen; anterior margin angularly insinuated in the middle, the lateral broadly rounded; lateral parts of disc with 30­35 long submarginal hair­like setae and anterior patch of about 10­12 long hair­like setae on either side (Fig. 1).

Scutellum densely punctate, with exception of its apex and antero­lateral angles, punctures somewhat larger than those on pronotal disc; basal and lateral rows of punctures well developed and clearly visible.

Corium punctate with punctures as large as those on scutellum; clavus with one complete and two partial rows of punctures; mesocorium with two rows of punctures parallelling clavo­corial suture, remaining surface of mesocorial disc weakly punctate; exocorium with two rows of punctures parallelling mesoexocorium suture and a single row aligned its lateral margin; costa with a row of 17­18 long hair­like setae; membrane semihyaline, slightly browned, clearly surpassing the tip of abdomen.

Propleuron almost impunctate, with a few hardly visible punctures close to coxae; evaporatoria typical of the genus.

Abdominal sterna laterally finely punctate, segments covered with numerous long hair­like setae, those aligning lateral margins (two on either side of segment) slightly longer than remaining setae and forming a longitudinal row on either side.

Legs not specifically modified.

Measurements (in mm) (female only): body length 3.22; body width 1.84; head length 0.61; head width 0.89; pronotum length 0.97; pronotum width 1.67; scutellum length 1.19; scutellum width 1.13; antennal segments 0.18: 0.15: 0.19: 0.17: 0.19.

NOTE

The new species is the fourth representative of Cydnidae , after Adrisa numeensis (MONTROUZIER) , Aethus philippinensis DALLAS , and Macroscytus subaeneus (DALLAS) , recorded from Flores so far ( LIS 1994, 1999a).