THE GIANT WATER-BUGS. 



1047 



Fig. 



211. Belostoma fluminea Say, dorsal and ventral views, X 2. 

 (After Drake, Tech. Bull. 16, X. Y. St. Coll. For.). 



sides distinctly less convergent behind middle than in lutarium, the disk 

 finely and thickly punctate. Silken stripe on sides of abdomen wider than 

 in lutarium, covering wholly the side pieces and impinging upon the 

 median plates of the ventrals. Length, 21 — 24 mm. ; width, 9.6 — 10.4 

 mm. (Fig. 211). 



Common throughout northern Indiana; less so in the south- 

 ern counties, May 11 — Oct. 21. Males at hand with eggs at- 

 tached bear the dates July 18, Aug. 11 and Oct. 21. It is often 

 taken beneath stones and rubbish near the margin of water. 

 Recorded by Barber from St. Augustine, Biscayne Bay and 

 Everglade, Fla., and therefore probably occurs throughout that 

 State. Its known range extends from Quebec and New Eng- 

 land west to Manitoba and Colorado and southwest to Florida, 

 Louisiana and Arizona. 



1186 (1394). Belostoma lutarium (Stal), 1855, 190. 



General color dull brownish-yellow, usually more or less strongly 

 tinged with fuscous; pronotum sometimes wholly fuscous; clavus and 

 corium each often with a vague oblique fuscous stripe; middle and hind 

 legs annulate with fuscous, front femora with spots of the same hue. 

 Head longer and tylus more convex than in our other species. Pronotum 

 as in fluminea, the sides more evidently sinuate. Scutellum broader at 

 base than there. Elytra more sparsely punctate, distinctly more strongly 

 tapering behind the middle, their tips more narrowly rounded or subacute. 

 Silken stripe on sides of abdomen narrow, confined to the middle of the 

 side pieces of the ventrals. Length, 22 — 26 mm.; width, 11.2 — 12 mm. 



