LIMNOGONUS.—BRACH YMETRA. 153: 
St. Vincent examples in the British Museum. In some of these latter the lower black 
patch on the mesopleura is obliterated. 
2. Limnogonus hyalinus. (Tab. IX. fig. 18, 3.) 
Hydrometra hyalina, Fabr. Syst. Rhyng. p. 258 (1803)’. 
Limnogonus hyalinus, Stal, Rio Jan. Hemipt. 1. p. 133”. 
Winged form. Rather robust, the head and pronotum shining, black, the head with two longitudinal lines,. 
united posteriorly, and the sides behind, ochraceous ; the pronotum with the lateral and posterior margins 
narrowly, two short lines on the anterior lobe, and a narrow median line extending thence to the apex, 
flavous or ochraceous; the elytra blackish-brown, streaked with paler brown on their inner half; the 
body beneath and the pleura ochraceous, the pleura streaked with black, the venter also with a black 
line on each side; the antenne blackish, with the basal half brown; the rostrum ochraceous, black at the 
tip; the legs brownish, the anterior femora paler towards the base; above thickly clothed with very 
short, fine, brownish pubescence, modifying the ground-colour; the under surface and the pale streak 
between the black stripes on the pleura thickly clothed with silvery pubescence. Antenne about reaching 
the hind coxe, slender, joint 1 slightly stouter, 1 and 3 subequal in length, 2 a little shorter than 1, 
3 shorter than 2. Pronotum not carinate, with the posterior margin thickened, the short anterior lobe 
distinctly defined. Elytra with thickened and very prominent nervures. Mesopleura strongly dilated 
before the intermediate coxe. Mesosternum canaliculate anteriorly. Anterior femora and tibie slightly 
curved and rather stout in both sexes. Anterior tarsi with joint 1 very much shorter than 2. Posterior: 
legs with the femora about one-fourth longer than the tibia and tarsus united, the first tarsal joint. 
twice as long as the second. 
3. Sixth connexival segment pointed at the outer apical angle; sixth ventral segment simply arcuate- 
emarginate ; first genital segment acutely produced at the middle of the apical margin beneath. 
@. Sixth connexival segment acutely produced at the outer apical angle, nearly reaching the tip of the last 
genital segment. 
Length 83-10, breadth 23-31, millim. 
Hab. Panama, Panama city (Champion).—SovutH America! ?, Cayenne. 
Two females and one male were obtained at Panama, and I have seen a male of the 
same species from Cayenne. This insect is very like LZ. marginatus, but differs from it 
in the non-carinate pronotum, the flavescent median line of which is very distinct ; the 
female, moreover, has the connexivum more acutely produced at the apex, and the 
male has the apex of the first genital segment produced into a point beneath. 
BRACHYMETRA. 
Brachymetra, Mayr, Verh. zool.-bot. Ges. Wien, xv. p. 445 (1865); Reise der Novara, Hemipt. 
p. 178. 
1. Brachymetra albinervus. (Tab. IX. figg. 19, 19a, o.) 
Halobates albinervus, Am. et Serv. Hist. Nat. Ins. Hémipt. p. 412". 
Brachymetra albinervus, Mayr, Verh. zool.-bot. Ges. Wien, xv. p. 445°; Reise der Novara, Hemipt. 
p- 178, t. 5. figg. 55a,6°; Uhler, P. Z. S. 1893, p. 706*; 1894, p. 212°; Kirk. Entom. 1898, 
p- 101°. | 
Hab. Panama, Bugaba (Champion).—Braziu 23°, Goya!, Rio Janeiro5; ANTILLEs, 
St. Vincent 4 ® ®, Grenada > ®, 
BIOL. CENTR.-AMER., Rhynch., Vol. II., October 1898. 20 
