[December 
110 Psyche 
by Stal as Limnogonus (Gerris) franciscanus may be L. 
guerini. 
Limnogonus aduncus, n. sp. 
Apterous Male : Dark brownish to black. Size and gen- 
eral aspect similar to Limnogonus recurvus D. & H. Head 
and pronotum with markings as in that species. Antennae 
dark brown; proportions, 104:88:68:87. Rostrum dark- 
brown, the apical segment blackish, reaching upon the an- 
terior portion of mesosternum. Front legs dark brown, 
stout, the femora slightly bowed and flattened beneath. 
Pronotum black, indistinctly margined with fulvous; an- 
terior lobe moderately tumid, with two short ochraceous 
lines on the disc; posterior lobe broadly rounded behind, 
extending upon base of metanotum, with a median ochra- 
ceous line. Abdomen above with a median longitudinal 
ochraceous line. Body beneath yellowish brown with gray- 
ish pubescence, the mesosternum large, the venter with a 
broad, blackish, submarginal stripe. Legs proportioned as 
in recurvus. Connexivum moderately broad, slightly pro- 
duced at apex, segments two, three, and four each with a 
prominent pale spot. Venter somewhat flattened, hairy 
along posterior margin, the last segment almost twice as 
long as the preceding. Genital segments large, dark brown- 
ish, segment I depressed on each side of a median raised 
portion which becomes narrowed posteriorly and ends in 
a distinct, recurved, blackish hook. Length, 9 mm. ; width, 
1.62 mm. 
Apterous Female: Broader and stouter than male, 
brownish black. Finely pubescent, the sides of pronotum, 
the intermediate and posterior acetabula, and second and 
third segments of connexivum silvery. Antennas brownish ; 
proportion, 92:72:111 and IV absent. Abdomen above with 
a broad, median, longitudinal flavous to fulvous stripe. 
Connexivum distinctly, triangularly produced behind. An- 
terior legs slightly bowed. Last segment of venter nearly 
twice as long as preceding, its hind margin convexly sin- 
uate at the middle. Length, 8.82 mm.; width, 2.15 mm. 
Winged Male: Pronotum with the humeri raised and 
prominent, the anterior lobe with a distinct indentation at 
