RHYXCHOPHORA. 



\_Dorytomtt8. 



B. Rostrum in part pubescent, shorter and 



thicker ; form broider D. AFFlNis, Fayk. 



2. Auterior margin of prosternnm deeply 

 emarginate in middle, the emargination 

 being sometimes almost hidden by the 

 pubescence which fills it; elytra, without 



small prominences before apex. 

 A. Head red; rostium shiny. 



a. Rostrum regularly curved for its whole 

 length, usually red but sometimes 

 brown ; elytra red, or dusky iii front 



and along suture D. MELANornTriALMUs. Paylc. 



V. agnathus, Boh. 



b. Rostrum almost straight to the inser- 

 tion of the antennae and then slightly 

 curved ; insect entirely red .... 



B 



D. PECTOKALIS, Oyll. 



(rufulus, Bedel.) 



D. SALICINUS, Gyll. 



Head black ; rostrum dull, rather stout, 

 usually black. 



a. Thorax plainly longer than broad ; 

 body behind thorax slender, scarcely 

 broader than base of thorax .... 



b. Thorax slightly transverse or about as 

 long as broad ; body behind thorax 

 broader, plainly broader than base of 



thorax. 



a*. Rostrum distinctly channelled ; 

 thorax rather longer ; colour of elytra 

 lighter D. SALICIS, Walt. 



b*. Rostrum not channelled ; thorax 

 slightly shorter; colour of elytra 

 darker D. MAJALIS, Payk. 



D. vorax, F. (longtmanus, Forst.). Pitchy, with imeven ashy tomen- 

 tose pubescence, elytra variegated with ferruginous and black, thorax 

 often more or less ferruginous ; head small, punctured, rostium long, 

 strongly curved, shining black, striated; antennae red with club often 

 darker ; thorax transverse, strongly constricted before apex, with the 

 sides rounded, rather thickly pubescent, closely and distinctly punctured ; 

 elytra with plain punctured striae, interstices broad ; prosternum broad 

 between the anterior coxae ; abdomen with sides and apex ferruginous ; 

 legs ferruginous or more or less pitchy, femora, except apex, and more 

 or less of tibiae, often darker ; size variable. L. 4|-7^ mm. 



Male with the rostrum much longer, and the antennae inserted 

 further towards its apex, and the anterior legs slender and very elon- 

 gate. 



Female with the rostrum and anterior legs comparatively short. 



On poplars and aspens ; often found hiding in the chinks of the bark in numbers 

 in late autumn and winter ; local, in the London and southern districts, but common 

 where it occurs ; Coombe Wood; Tooting; Dover; Glanvilles Wootton (common); 

 Exeter; widely distributed in the Midlands; Lincoln, abundant in cracks of willow 

 bark near a row of aspens to the south of the town ; Manchester district, general in 

 decayed poplars ; Scarborough ; much less common in the north ; Northumberland 



