Byrsinus, Fieber, Fieber, 1860

Lis, Jerzy A., 2001, A REVIEW OF THE GENUS BYRSINUS FIBBER, 1860 (HEMIPTERA: HETEROPTERA: CYDNIDAE) IN AUSTRALIA, WITH A KEY TO AUSTRALO-PACIFIC SPECIES, Annales Zoologici 51, No. 2, pp. 197-203 : 203

KEY TO AUSTRALO-PACIFIC SPECLES OF BYRSINUS

l. Head margins with peg-like and hair-like setae (Fig. 5) ............... .. ' ........... ' ... ...... ' ... 2 - Head mru·gins with hair-like setae only, peg-like setae absent (Fig. 4) ........ ........... ..... ...... 3

2. Small species (3.22-3.32 mm in length, 1.84-2.07 mm in width); eyes small, ocular index 3.4-3.9; ocelli very small, ocellar index 7.5-9.0; male para.mere as in Fig. 1J (East Indonesia, Australia) ............. ................................. B. setosus,J. A. Lis -. Lal'g·e species (3.40-4.50 mm in length, 2.10- 2.70 mm in width); eyes large, ocular index 2.4-3.0; ocelli large, ocellar index 4.0-5.0; male paramere as in Fig. 12 (Oriental Region). .. ... .......... B. varians ( E)

3. Body with numerous long hair-like setae on its margins, as well as ou pronotum, scutellum and corium ( Fig. 2); para.mere narrow (Fig. 9) (Australia).. ........ ..... .............. B. multitrichus sp. nov. - Body with long hair-like setae only on its margins; pronoturn, scutellum and corium bare ( Figs 1, 3); 1>aramere robust (Figs 8, 10) .... ........ ...... 4

4. Bucculae narrow posteriorly (Fig. 7); prosternal carinae low, slightly elevated (Fig. 7); pararnere as in Fig. 8 (Australia) ............... B. australis sp. nov. -. Bucculae very broad posteriorly (Fig. G); prosternal ca.rinae distinct and high (Fig. 6); paramere as in Fig. 10 (Australia) ...... ............. B. ochraceus (Dist.)