340 RIITNCHOPHORA. [Poophagus. 



catalogue published in 1871, but in the catalogue of Hey den, Reitter 

 and Weise five species are referred to it, so that it is probably more ex- 

 tensive than is at present known ; in appearance they differ from 

 Ceuthorrliyncus in being more elongate and less thick set ; the elytra 

 are not strongly cut back at the shoulders nor are they warty at apex ; 

 the thorax has no tubercles and is scarcely constricted at apex ; the 

 femora are rather slender and the claws are simple. 



1. Prevailing colour grey; antenna and tarsi black; femora 



without tooth P. SISYMBEII, F. 



2. Prevailing 1 colour greenish ; antennae and tarsi reddish tes- 

 taceous ; femora with a small but distinct tooth .... P. NASTTJEiii, Germ. 



P. sisyxnbrii, F. Oblong, rather depressed, black, clothed on both 

 upper and under surface with thick white scales ; rostrum long and 

 slender ; thorax at least as long as broad, constricted before apex, with 

 two dark longitudinal bands about middle ; elytra long, with punctured 

 striae, with the shoulders, an oblique spot about middle and another be- 

 fore apex, denuded and black ; these spots are usually more or less 

 confluent and are very variable in size according to the freshness of the 

 specimens ; legs long, black clothed with white scales, femora not 

 toothed. L. 2i-3f mm. 



Male with the last ventral segment of abdomen slightly impressed and 

 the antenna? inserted a little before middle of rostrum. 



Female with the abdomen even and the antennae inserted in the 

 middle of rostrum. 



Marshy places ; on Nasturtium ampfiibium , not uncommon and generally dis- 

 tributed throughout England and Wales ; Scotland, local, Solway, Tweed and Forth 

 districts; Ireland, Waterford, Galway, Armagh and probably general. 



P. nasturtii, Germ, (plivaceus, Gyll.). Broader than the preceding, 

 greenish-bronze, thickly clothed with greenish-grey scales on both the 

 upper and under side ; rostrum long, black, with extreme apex red, 

 antennae red with club darker ; thorax gradually narrowed in front, 

 scarcely constricted before apex, closely punctured ; elytra with rather 

 fine punctured striae, interstices rather broad, closely punctured ; femora 

 dark, clothed with greenish-grey scales, tibiae in part reddish, tarsi red ; 

 in some specimens there are traces of denuded spots and fasciae on elytra. 

 L. 2f-3| mm. 



In ditches, &c. ; on Nasturtium officinale ; both this and the preceding species 

 are usually found beneath the surface of the water ; rare, but sometimes found in 

 considerable numbers, where it occurs; Hythe (Tylden) ; Exminster marshes, Devon, 

 rare (Parfitt) ; Rudham, Norfolk, fairly common (T. Wood) ; Hunstanton, Norfolk, 

 stream on the road to Heacham (W. G. Blatch and myself) ; Uphill, Weston-super- 

 Mare (Crotch) ; Notts and Yorkshire (Stephens). 



CEUTZIOR21KYNCHUS. Duval. 

 This genus is by far the most important in point of numbers of all 



