— 384 — 



oblong apical spot; abdomen black, connexivum ochraceous; legs fuscous-brown, femora 

 broadly annulated with ochraceous; antennae with the first and second joints ochraceous, 

 their apical areas fuscous, third and fourth joints brownish-ochraceous, first Joint passing 

 apex of head, slightly longer than second, both moderately thickened, fourth Joint 

 longest, third longer than second ; pronotum coarsely punctate with a central longitudinal 

 carinate line, posterior lateral angles moderately prominent and outwardly carinate. 



Long. 2 mill. 



One winged form from which the above description is taken and a series of 

 apterous forms. Both are here figured. 



Allied to M. i'avuus Buch. White from Isl. Hawaii. 



Gen. Rhagovelia Mayr. 



Distribution: Apparently found in all the principal zoological regions. 



39. Rhagovelia nigricans (Burm.). 

 ]'eli(> nigricans Burm. Handb. Ent. 11. p. 213 (1835). 



Distribution: Syria, Egypt, Abyssinia, Mascarenes, Se3'chelles Islds., Ceylon, 

 New Caledonia, W. Indies. 



Localities: Nkw Caledonia; Oubatche, Canala, Coinde. 



Siibfam. Hydrometrinae. 

 Gen. Hydrometra Latreille. 

 Distribution: Apparently found in all the principal zoological regions. 



40. Hydrometra aculeata Montr. 

 Ilxciroiurtra acitleata Montr. Ann. Soc. Linn. Lyon, XI, p. 240 ( 1864). 

 Distribution: New Caledonia. 



Localities: Oubatche, Canala. 



Subfam. Gcrrinae. 

 Gen. Gerris Fabricius. 

 Distribution: Universally distributed. 



41. Gerris luctuosa Montr. 

 Gerris lucfuosa Montr. Ann. Soc. Linn. Lyon. XI. p. 242 (1864). 

 Distribution: New Caledonia. 

 Localities: Oubatche, Cone, Canala. 



