DISTANT—RHYNCHOTA. PART I: SUBORDER HETEROPTERA 161 
more nearly allied to A. green? Dist. from Ceylon, but from this species it differs in the 
shorter antennze, narrow pronotum «ec. 
Family Hydrometride. 
The one species brought home by Prof. Gardiner, and recorded in my previous paper, 
has again been found by Mr Hugh Scott. 
Subfamily Hydrometrine. 
67*. Hydrometra ambulator, Stal. 
Hydrometra ambulator Stal, Ofv. Vetensk.-Akad. Forh., xii. p. 45 (1855). 
Loc. Seychelles. Silhouette: from marshy plateau of Mare aux Cochons, over 
1000 feet, and from the lower part of a stream near the coast at Anse Moudon. Mahé: 
from near Morne Blanc, about 1000 feet ; marshes on coastal plain of Anse aux Pins and 
Anse Royale; Mare aux Cochons district, 1500—2000 feet. Previously recorded from 
Mahé. Found in 8. Africa. 
Subfamily Veliine. 
Three species of this subfamily are now enumerated, including the one listed 
previously. 
68*. Rhagovelia nigricans (Burm.). 
Velia nigricans Burm., Handb. xi. p. 213 (1835). 
Loc. Seychelles. Silhouette: marshy plateau of Mare aux Cochons, over 1000 feet, 
and from rivers near coast. Mahé: from near Morne Blanc; Mare aux Cochons district, 
1000—2000 feet; Port Victoria. Formerly recorded from Praslin and then stated to be 
a very widely distributed species. 
PICAULTIA*, gen. nov. 
Apterous form, °. Head almost as long as breadth, including eyes, which are 
prominent, distinctly separated from base of head and slightly projecting beyond the 
anterior angles of the pronotum; antennz four-jointed, hirsute, first and second joints 
a little stoutest, first passing apex of head and a little longer than second ; rostrum 
passing the anterior, but not reaching the intermediate cox; pronotum strongly trans- 
versely impressed near middle creating somewhat the appearance of an anterior lobe, 
which is a little convex and possesses a slender curved spine near each end of the incision, 
the lateral margins hirsutely pilose, the posterior margin rounded, an oblique piece of the 
mesonotum exposed on each side and near its apex a slender curved lateral spine is 
also exposed ; connexivum very long and broad, upturned, converging posteriorly ; legs 
moderately long, femora straight, intermediate and posterior tarsi long, subequal and 
two-jointed. The spines and general structure of the pronotum are the salient 
characters of this genus. 
* Named after Captain Lazare Picault who commanded an expedition to these islands, 1742. 
