HEMIPTERA HETKROPTERA. 173 



Genus 3. PELTOPTERUS. 



Peltopterus, Guer. Rev. Zool. 1843, 113. Stat, Hem. Afr. iii. 173— 

 Scylcecus, Stal, Ofv. K. V. Ak.'Forh. xviii. 201. 



1. Peltopterus rugosus. 



Naucoris rugosa, Desj. A. S. E. F. vi. 239; Serv. A. S. E. F. vi. 243- 

 Peltopterus rugosus, Gue"r. Rev. Zool. 1843, 1 13. Stal, Hem. Afr. 

 iii. 173. 



Mauritius. 



2. Peltopterus macrothorax. 



Galgulus macrothorax, Mtrz. Ann. Sci. Phys. 2me Ser. vii. 1, 110— Pel- 

 topterus macrothorax, Stal, Ofv. K. V. Ak. Fork, xxvii. 706. 



Philippine Isles. 



PEDIRAPTI. 



Fam. NAUCORIDAE. 



Naucoridae, Serv. Hist. Hem. 426 — Naucoridae and Aphelochirae, Fieb. 

 Eur. Hem. 32 — Naucorida and Belostomadida, Stal, Hem. Afr. iii. 

 174, 178 — Aphelochirina, Aphelochiridee, Naucoriua and Naucoridae, 

 Dougl. and Scott, Hem. 43 — 45 — Naucorina and Belostomiua, Stal, 

 Ofv. K. V. Ak. Fork, xxvii. 706. 



A. Membrane developed. 



a. Fore tarsi two-jointed. 



* Fore tarsi with one claw. 



f First joint of the fore tarsi shorter than the second; 



claw as long as the two joints together. - - Belostoma. 



|| First joint of the fore tarsi as long as the second ; claw 



shorter than the second joint. - - - Zaitha. 



** Fore tarsi with two claws. - - - Appasus. 



b. Fore tarsi with one joint. - Naucoris. 



B. Membrane rudimentary. 



a. Fore tarsi with two joiuts. - Spherodema. 



b. Fore tarsi with one joint. - Diplonychus. 



Borberotrephes is distinguished from Appasus by the fore femora not 

 incrassated; Benacus from Belostoma by the fore femora not furrowed 

 beneath ; Hydrocyrius from Belostoma by having two claws on the fore 

 tarsi ; Serphus and Abedus from Zaitha by having the metaslmium 

 keeled; Nervinops from Sphocrodoma and Appasus by the one-jointed fore 

 tarsi ; Serphus from Abedus as follows: — 



\ First and second joints of the rostrum about equal in 

 length. Third joint of the antennae with a short 

 acute process. Commissural border of the clavus 



