HEMIPTERA HETEEOPTEBA. 
201 
5. SlGARA. POWERI. 
Poweri, Dougl. and Scoll, Ent. M. Mag. 296. 
England. 
6. SlQABA FUSCATA. 
fuscata, Stal^ Eug. Resa, 268. 
Monte Video. 
7. SlQARA SCUTELLARIS. 
scutellaris, Stal, Ofv. K. V. Ak, Fork, x'f, 319 ; Hem. Afr. iii. 193. 
South Africa. 
8. SlGABA SULCATA. 
sulcata, Sgnt. A. S. E. F, 3me Ser. viii. 971. Stal, Hem. Afr. iii. 193. 
Madagascar. 
Div. 2. 
Nychia, Stal, Eug. Resa, 268. 
9. SiGARA LIMPIDA. 
Nychia limpida, Stal, Eug, Resa, 269. 
Wampoa, China. 
Fam. 2. NOTONECTIDiE. 
Notonectidae, Serv. Hist. Hem. 449 — Notonectici, Burm. — Notonectida 
and Pleida, Stal, Hem. Afr. iii. 190, 192 — Notonectidea, Notonectse 
and Pleae, Fieb. Eur. Hem. 22 — Notoneclica, Flor. — Notonectina, 
Notonectidae and Pleidae, Dougl. and Scott, Hem, 48. 
A. Eostrum two-jointed. Antennae three-jointed. - 1. Plea. 
B. Eostrum four-jointed. Antennae four-jointed. 
a. Prothorax with a large impression in the fore angles. - 2. Enithabes. 
b. Prothorax with no impression on the fore angles. 
* Fourth joint of the antennae shorter than the third. - 3. Notonecta. 
** Fourth joint of the antennae longer than the third. - 4. Anisops. 
Genus 1. PLEA. 
Plea, Leach, Trans. Lin. Soc. xii. 14. Fieb. Eur. Hem. 31, 101. Dougl. 
and Scott, Hem. 591 — Ploa, Steph. Burm. Handb, Ent. ii. 189. 
Serv. Hist. Hem. 449. Fieb, Ent, Mon. 17, 1. 
Europe. 
1. Plea minotissima. 
, Geoffr. Ins. i. 477 — Notonecta minutissima, Fabr. Ent. 
Syst, ir. 59 ; Syst. Rhyn. 104. Panz. Faun. Germ. 2, 12. Oliv. Enc. 
