576 LIMNOBATINA. 



subequal ; 1st joint short, 2ad 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 $ ; Coiuiexivum reflexed, broad in 

 the ?. 



---^ JSjjecies 1. — Limnobates stagnouum. 



CniEX STAGNOKUM, Liu. F. S. 971 (1761); S. N. 732, 118 (1767); 



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

 — Acus, Be G. Mem. iii, 332. 40, pi. 15, figs. 24, 25 (1773). 

 Gekuis STAGN0RU3I, Fu/j. E. S. iv, 188, 4 (1794) ; Full. Mon. Cim. 116, 



4 (1807). 

 HvDUOMETKA — FuL S. 1\. 258, 6 (1803) ; LaL Geu. iii, 131, 1 



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



Schmi. Beitr. 2, 14, t. 1, figs. 1—6 (1832) ; Jm. 



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

 ExMESA — Fall. Hem. Suec. 162, 1 (1829). 



Limnobates — Barm. Haiidb. ii, 211, 1 (1835) ; Fleb. Europ. Hem. 



103 (1861). 



Black, dull. 



Head sometimes brown at base and apex. Antennce black, 

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

 piceous. 



Thorax. — Pronotum posteriorly, and soaietimes anteriorly, brown- 

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

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

 2 small, lateral, rounded tubercles posteriorly. Eli/tra 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 ; tli'ujlis at the apex, tibicd 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 ; Connexivum, in the $ , outwardly brown, the 

 margin darker; the base of each segment with a sliort 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. 



