376 BHYNCHOPHOKA. [Phytobius. 



This species may be distinguished from those that follow by having 

 the anterior margin of the thorax almost simple, and the lateral tubercles 

 of the thorax somewhat obsolete, and also by having the anterior coxae 

 separated by a narrow space and almost contiguous. 



P. Waltoni, Boh. (notula, GylL, nee Germ., nee Thorns.). Short, 

 rather convex, black, under surface and a broad streak on each side of 

 thorax covered with white scales, elytra variegated with white ; antennae 

 and legs red or yellowish-red, femora furnished beneath Avith a nigro- 

 fuscous spot before apex ; thorax rather long, narrowed in front, with- 

 out central furrow, and with four moderate tubercles ; elytra with rather 

 deep punctured striae, interstices not muricate ; rostrum comparatively 

 long, a point which, in conjunction with the absence of a channel on 

 the thorax, will easily distinguish it from its near allies. L. 2 min. 



Male with the intermediate tibiae armed with a small hook. 



Marshy places; on aquatic plants; very local, but sometimes not uncommon; 

 Esber ; Mickleham ; Woking; Cowley ; Barnes Common, formerly in abundance 

 (S. Stevens); Windsor; Woodbastwick, Horning (Norfolk) ; Hastings; in. moss, 

 canal near Southsea, common in spring (Moncreaff). 



P. quadrituberculatus, F. (notula, Germ., nee Thorns., nee Gyll.). 

 Short, upper surface rather depressed, under surl'ace and sides of thorax 

 closely covered with greyish scales, upper surface variegated with the 

 same ; antennas, except club, ferruginous, legs dark, tibiae ferruginous 

 with a fuscous ring before middle ; rostrum short ; thorax rather strongly 

 punctured, narrowed in front, with four foveae, a more or less distinct 

 central furrow, and four distinct tubercles, two on anterior margin and 

 two behind middle ; elytra with moderately deep punctured stride, 

 interstices convex, the fifth to the eighth set with small rough tubercles, 

 especially behind ; anterior coxae rather broadly distant ; prosternum 

 excavate, with the excavation margined on each side ; anterior coxae 

 rather broadly distant. L. 2-2| mm. 



Male with the posterior tibiae armed with a hook. 



Marshy places ; on aquatic plants ; not uncommon ; London district, generally 

 distributed, Weybridge, Caterham, Shirley, Lee, Faversham, Chatham, Dulwich, West 

 Wickhatn, &c. ; Loughton, Essex ; Deal ; Hastings ; Southsea ; New Forest ; Devon, 

 Westward Ho! common on stones near the Pebble ridge in August; Norfolk ; Hert- 

 ford ; Midland counties, general ; Liverpool ; Manchester ; Heysham, Lancaster ; 

 Northumberland and Durham district; Scotland, local, Solway, Tweed and Forth 

 districts ; Ireland, near Dublin, Waterford and Belfast and probably general. 



This species may be distinguished by the rather widely distant 

 anterior coxae, the muricate sides of elytra, the distinct tubercles of the 

 thorax which is foveate on disc, and the margined excavation of the 

 prosternum ; the scales on the upper surface are, as a rule, very scanty. 



P. canaliculatus, Fahr. (notula, Thorns., nee Germ., nee Gyll.). 

 This species may be known from P. comari by the more evident tuber- 

 cles of the thorax and the dark velvety patch at base of suture; 



