126 HEMIPTERA-HETEROPTERA. 
specimen and mentioned by Buchanan White) are probably present in the winged form 
only. This insect is closely allied to the Palearctic H. stagnorum (Linn.), differing from 
it in colour and in having shorter antenne, with a relatively shorter third joint. Both 
species have the rostrum extending almost to the base of the head. The antenne are 
only about half the length of those of H. caraiba. The elytra in the winged female 
from Santarem nearly reach the apex of the fourth dorsal segment. HH. argentina, 
Berg, is coloured like H. mensor, but it is described as having the antenne formed as 
in H. stagnorum. Some North-American specimens in the British Museum, received 
from Doubleday, are very like H. mensor. 
Subfam. VELIINZ. 
MICROVELIA. 
Microvelia, Westwood, Ann. Soc. Ent. Fr. iii. p. 648 (1834); Amyot et Serville, Hist. Nat. Ins. 
Hémipt. p. 421. 
Hydroessa, Burmeister, Handb. der Ent. ii. p. 213 (1835) ; Fieber, Europ. Hemipt. pp. 33, 104; 
Stal, Hemipt. Afric. ii. p. 167. 
Veliomorpha, Carlini, Ann. Mus. Genova, xxxv. p. 120 (1895) *. 
A very widely distributed genus, containing seventeen described species. The eight 
now added are all treated as new, two of them being represented by apterous individuals 
only. Westwood referred two species to it—W. pulchella, Westw., from the Island of 
St. Vincent, and the European UM. pygmea (Duf.); his figures are taken from the 
Antillean insect, which has a long apical joint to the antenne. In one of the Antillean 
species, M. longipes, Uhler, from Grenada, the hind legs are very elongate. 
a. Posterior tibiz without long bristly hairs. 
a’, Body subparallel or subfusiform ; tibize slender. 
a", Antenne with joints 1 and 2 subequal in length. 
a", Antenne and legs entirely testaceous ; elytra mottled with whitish ; 
pronotum without median ridge . . . . . . . . . « « flavipes, n. sp. 
b!, Antenne and legs not entirely testaceous. 
a‘, Fourth antennal joint as long as the third. 
a’. Antenne moderately slender, with joint 3 slightly longer 
than 2; pronotum witha median ridge; elytra mottled with 
pale brown ; posterior femora minutely toothed in the ¢ . paludicola, n. sp. 
6°. Antenne very slender, with joint 3 much longer than 2. 
a®, Elytra with indistinct greyish streaks; pronotum with a 
faint median ridge; posterior femora minutely toothed 
inthe ¢ . . 2... ee ee ee ee paanaamensis, 1. Sp. 
* Dr. Carlini (loc. cit.) describes the tarsi of Micrevelia as 2-jointed; but most authors give them as 
Y-, 3-, 3-jointed, counting the very short rudimentary joint of the intermediate and hind pairs as a true joint. 
He has almost certainly overlooked the short basal joint of the first pair in his genus Veliomorpha. 
