HUNGERFORD: AQUATIC HEMIPTERA. 113 
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 antennz 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- 
color; 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. 
“Male: 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. 
“Female: Sixth connexival segment acutely produced at the outer 
apical angle, nearly reaching the tip of the last genital segment. 
~ “Tength, 8% to 10; breadth, 2% to 3149 mm.” 
Locality: Florida. 
Tenagogonus franciscanus Stal. 1859. 
Stal.-Freg. Eugen. Resa. Ins., p. 265, 1859. 
Tenagogonus hesione Kirk. 1902. 
Kirkaldy, Entomologist, XXXV, p. 137. 
“Distinguished from the other American species of Limnogonus by 
much smaller size and proportionately greater width. 
“Black, base of head medianly, a round spot near anterior margin of 
pronotum medianly, lateral margins of pronotum, ferruginous; antenne, 
intermediate and posterior legs ferruginous, more or less fumate, anterior 
femora blackish, basally pallid. Elytra olivaceous, fumate, nervures 
blackish. Beneath covered with silvery grey pubescence. Head (with 
eyes) two-fifths wider than long, pronotum roundly angulate posteriorly. 
“Male: Anterior tibiz curved. Long. (to apex abd.), 54% mm. 
“America: Florida; Darien (collns. Montandon and Kirkaldy).” 
Ohio added by Van Duzee’s catalogue. 
Genus METROBATES Uhl. 
“Robust and broad. Winged form: head very convex, a little slanting 
forwards, between the eyes narrower than long, much narrower than the 
pronotum; eyes very large, viewed from above placed obliquely, sub- 
- globose, moderately prominent, their upper surface below the line of the 
vertex, projecting widely over the sides of the pronotum; with one or 
two impressed lines running across near the middle. Antennz stout, 
almost as long as the entire body, the basal joint nearly as long as the 
three others conjoined, curved at base, and narrowing in that direction, 
much stouter in the male, and a little expanded at tip, the under side with 
erect hairs; second joint about one-third the length of the basal one, 
greatly enlarged at tip; the third shortest, enlarged at tip; fourth very 
stout, fusiform, almost as long as the second. Rostrum stout, hairy, ex- 
tending beyond the basal line of the prosternum. Pronotum ample (in 
the unwinged form narrow and short, with the mesothorax forming the 
8—Sci. Bul.—1669. 
