Dlchirotrlc]iU!i.'\ adkpiiaga. 55 



DICKIROTRICHUS, Duval. 



About ten species are contained in this genus, which are widely dis- 

 tributed throughout Europe, one only occurring as far south as the 

 Canary Islands ; our two species may be separated as follows : — 



I. Interstices of el.\tra broad with three rows of irregular 



piincturcs on each ; stria; weak, almost impunctate . . D. OBSOLETUS, Bej. 



II. Interstices of elytra narrow with one or two rows of 



irregular punctures on each ; stria3 strong D. pubescens, Pa^^. 



The larva of D. pubescens is described by Schiodte (iii. 259, PI. xxii., Fig. 19) as 

 belonging to the genus Bradycellus ; it very closely resembles that of Sfenolophus, 

 but is somewhat broader with the bead rather larger, and the anal appendage very 

 short and stout ; the ma.vilkv, especially the stipites, are much larger, aud the dorsiil 

 abdominal scuta are smaller; the colour is white with the legs, cerci, and dorsal 

 scuta pale ferruginous, with darker markings on head and segments of thorax; the pro- 

 thorax is transverse with all its anglfs obtuse, slightly convex, with the sides sharply 

 and narrowly margined : the larva is found in salt marshes with the perfect insect. 



D. obsoletus, Dej. Always of a light testaceous colour, with a dusky 

 streak on each elytron, head sometimes dark; thorax about as long as 

 broad with sides slightly rounded in front and narrowed behind, witli a 

 very strong oblong depression on each side at base ; elytra broad with 

 fine strife which are almost impunctate, interstices with three irregular 

 rows of punctures on each; legs light testaceous. L. 7 mm. 



Locally abundant ; salt, marshes beneath stones, clods of earth, &c. ; Lymington 

 Salterns, Whit stable, Shcerness, aud other places on the south and south-east coasts, 

 but not occurring further north. 



D. pubescens, Payk. Very like the preceding, but smaller and 

 narrower, and, as a rule, much darker in colour, being sometimes entirely 

 pitchy ; the thorax is more cordiform and the punctures on its disc arc 

 larger and more dilfuse ; the elytra are narrower in proportion to thorax 

 with strong and strongly punctured striae, interstices with one or two 

 irregular rows of punctures on each. L. 6 mm. 



Salt marshes and banks of tidal rivers : very connmon in England ; Scotland rather 

 widely distributed but local; Ireland, near Dublin aud Belfast, and probably 

 common. 



SCYBAXiICUS, Schaum. 



This small genus was formed l)y Schaum to include one or two insects 

 that were formerly included under ILirpaJus, but which were evidently 

 quite distinct in several particulars ; he first named the genus Apaieliim, 

 but afterwards gave it its present name. 



S. oblongriusculus, 1 )ej . Al)out the size and build of ft. rotiiinh'rn]/is, 

 but rather iiarmucr ; thuk jiitcliy red ; antennie and palpi ferruginous; 

 head strongly punctured ; thorax witli sides rounded in front, strongly 

 contracted behind, posterior angles rounded, with distinct central furmw 

 ending in a depression in front and behind, strongly ptinctuvrd throu^li- 



