576 LIMNOBATINA. 



subequal; 1st joint short, 2nd and 3rd long, subequal, the last 

 with 2 short, fine claws inserted at the end. 



Abdomen flat above, convex beneath, the sides linear in the 

 $ , a little curved out in the $ ; Gonnexivum reflexed, broad in 

 the ?. 



Species 1. LIMNOBATES STAGNORUM. 



CIMEX STAGNOIUJM, Lin. F. S. 971 (1761) ; S. N. 732, 118 (1767) ; 



Schrk. F. B. ii, 96 (1801). 



ACTJS, De G. Mem. iii, 332, 40, pi. 15, figs. 24, 25 (1773). 

 GBEKIS STAGNORUM, Fab. E. S. iv, 188, 4 (1794) ; Fall. Mon. Cim. 116, 



4 (1807). 

 HYDKOMETKA fab. S. R. 258, 6 (1803) ; Lat. Gen. iii, 131, 1 



(1807); Curt. B. E. i, 32, p. & pi. 32 (1824); 



Sehum. Beitr. 2, 14, t. 1, figs. 16 (1832) ; Am. 



et Serv. Hero. 400, 1 (1843). 



EMESA Fall. Hem. Suec. 162, 1 (1829). 



LIMNOBATES JBurm. Handb. ii, 211, 1 (1835) ; Fieb. Europ. Hem. 



103 (1861). 



Black, dull. 



Head sometimes brown at base and apex. Antennae black, 

 1st and 2nd joints fulvous, except the apex. Rostrum black or 

 piceous. 



Thorax. Pronotum posteriorly, and sometimes anteriorly, brown- 

 ish ; sides anteriorly, and disk in the middle longitudinally, with a 

 fine silvery gray line. When the elytra are developed the disk has 

 2 small, lateral, rounded tubercles posteriorly. Elytra fuscous, with 

 long, dull ochreous spots between the black nerves, interrupted 

 by the oblique transverse nerve, which is bordered with fuscous 

 black. Sternum; apex of the coxal sheaths broadly ochreous. 

 Legs fulvous j thighs at the apex, tibia on the last 3rd, and tarsi, 

 black. 



Abdomen above, sometimes brown on the sides, irrorated with 

 minute, shining, golden atoms, except down the middle, where 

 is a dull black line j Connexivum, in the ? , outwardly brown, the 

 margin darker; the base of each segment with a short silvery 

 gray line. 



Length, 4-i 5 lines. 



Common in ponds among Lemna, from spring to autumn, The 

 insects move but slowly on the surface of the water. 



