HUNGERFORD: AQUATIC HEMIPTERA. 113 



extending thence to the apex, flavous or ochraceous ; the elytra blackish- 

 browTi, streaked w-ith paler browTi 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 antennae 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, modifjnng the ground- 

 color; the under surface and the pale streak between the black stripes 

 on the pleura thickly clothed with silvery pubescence. Antennae about 

 reaching the hind coxae, slender, joint 1 slightly stouter. 1 and 3 subequal 

 in length, 2 a little shorter than 1, 3 shorter than 2. Pronotum not 

 carinate, ^vith the posterior margin thickened, the short anterior lobe 

 distinctly defined. Elytra with thickened and very prominent ner\iires. 

 Mesopleura strongly dilated before the intermediate coxae. Mesosternum 

 canaliculate anteriorly. Anterior femora and tibiae 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, nearlv reachinsr the tip of the last genital segment. 



"Length, 8^^ to 10; breadth, 2^ to 3Ho mm." 



Locality: Florida. 



Tenagogonits fraiiciscanics 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 Limnogoyius by 

 much smaller size and proportionately gi-eater width. 



"Black, base of head medianly, a round spot near anterior margin of 

 pronotum medianly, lateral margins of pronotum, ferruginous; antenns, 

 intermediate and posterior legs ferruginous, more or less fumate, anterior 

 femora blackish, basally pallid. Eh-tra olivaceous, fumate. ner\'ures 

 blackish. Beneath covered with silvery grey pubescence. Head (with 

 eyes) two-fifths wider than long, pronotum roundly angulate posteriorly. 



"Male: Anterior tibiae curved. Long, (to apex abd.), 5^2 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. Antennje 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 shoi't, with the mesothorax forming the 



8 — Sci. Bui. — 1669. 



