442 CLASS vin. 



Family XXXIX. Geocorisce (Aurocorisa WESTW.). Antennas 

 exsert, longer than head, inserted towards the inner margin of eyes. 

 Tarsi with three joints, with first joint very short in some. Ros- 

 trum often long, sometimes produced beyond the thorax. 



Mostly terrestrial Hemiptera ; few aquatic, living on the surface 

 of the water, or inhabiting the banks. 



Land lugs. This numerous family forms with LINNAEUS only one 

 genus (Cimex), out of which, from the discovery of new forms and 

 the more accurate distinction of the species formerly known, far 

 more than 100 genera have already been formed by modern writers. 



Phalanx I. Oculata (Acanthiidce WESTW.) Sheath of rostrum 

 triarticulate. Feet long, slender, terminated by two long claws. 

 Antennas quadriarticulate. Eyes large, protuberant. Ocelli two, 

 in vertex. Head without distinct neck, separated by a small stric- 

 ture from thorax. 



Salda FABR., (in part) BURM., Acanthia LATR. Antennae fili- 

 form, of the length of head and thorax. 



Sp. Salda littoralis FABB. (and Lygceus saltatorius FABR.), Cimex littoralia 

 L. (and Cim. saltatorius L.), DE GEEB, Mem. m. PI. 14, figs. 17, 18; 

 WOLFF, Wanzen, Tab. vin. fig. 74 ; this species leaps like a froth-cicada. 



Leptopus LATR. Antennas setaceous, nearly of the length of 

 body, with third joint very long. Anterior feet spinose. 



Sp. Leptopus littoralis LATR., Cuv. R. Ani. ed. ill. PL 93, fig. i, &c. 



Phalanx II. Hydrodromica. (Hydrometridce WESTW., Ploteres 

 LATR.). Sheath of rostrum triarticulate. Head almost of the 

 length of thorax, without distinct neck. Ocelli sometimes none. 

 Four posterior feet longer than anterior, formed for going on the 

 water, inserted at the sides of thorax, remote from each other. 

 Head ovato-oblong or linear, covered beneath with a silky down. 



Antennae moderate, filiform, quadriarticulate, and either with a 

 single accessory joint, very short between the second and third, or 

 with three, interposed between each of the others. Tarsi with two 

 or three joints, the last joint shortest. 



A. Claws of tarsi inserted in a fissure at the inside before the 

 extremity of last joint. 



