HEMIPTERA HETEROPTERA. 173 
Genus 3. PELTOPTERUS. 
Peltopterus, Guér. Rev. Zool. 1843, 113. Stal, Hem. Afr. iii. 173— 
Scylecus, Stal, Ofv. K. V. Ak.tForh. xviii, 201. 
1. PELTOPTERUS RUGOSUS. 
Naucoris rugosa, Desj. A. S. E. F. vi. 239; Serv. A. S.E, F. vi. 243— 
Peltopterus rugosus, Guér. Rev. Zool. 1843, 113. Stal, Hem. Afr. 
iii. 173. 
Mauritius. — 
2, PELTOPTERUS MACROTHORAX. 
Galgulus macrothorax, Mirz. Ann. Sci. Phys. 2me Sér. vii. 1, 110—Pel- 
topterus macrothorax, Stal, Ofv. K. V. Ak. Forh. xxvii. 706. 
Philippine Isles. 
PEDIRAPTI. 
Fam. NAUCORID. 
Naucoride, Serv. Hist. Hem. 426 — Naucoride and Aphelochire, Fied. 
Eur. Hem. 32—Naucorida and Belostomadida, Stal, Hem. Afr. iii. 
174, 178—Aphelochirina, Aphelochiride, Naucorina and Naucoride, 
Doug!. and Scott, Hem. 43—45—Naucorina and Belostomina, Stal, 
Ofv. K. V. Ak, Fork. xxvii. 706. 
A. Membrane developed. 
a. Fore tarsi two-jointed. 
* Fore tarsi with one claw. 
+ First joint of the fore tarsi shorter than the second; 
claw as long as the two joints together. - -  BeEtostoma. 
+} 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. - - - - Navucoris. 
B. Membrane rudimentary. 
a. Fore tarsi with two joints. = - - - - SpHERODEMA, 
b. Fore tarsi with one joint. - - = - Diptonycuts. 
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 metasternum 
keeled; Nervinops from Spherodoma 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 antenne with a short 
acute process. Commissural border of the clavus 
