NORTHUMBERLAND AND DURHAM. 79 



In the dark specimens, very much resembling Tachyusa foveola, 

 in shape and colouring, but much less, with more evident punc- 

 turing, and the colour somewhat deeper. Linear, black, rather 

 shining, abdomen more shining, with a slight griseous down, more 

 distinct upon the elytra. Antennae rather short, of the length of 

 the head and thorax, rather slender at the base, not very much 

 thickened externally, 2nd and 3rd joints slender, sub-elongate 

 nearly equal, the rest short, separate, 4th very small, 7 — 10 

 incrassate, 9 th and 10th sub-transverse, the apical still larger, 

 rotundate ovate, shortly acuminate; black, the three basal joints 

 scarcely piceous; or, in the variety, externally more or less 

 fuscescent, the basal joints ferrugineo-testaceous. Palpi piceous at 

 the apex ; mouth rufo-piceous ; in the variety, mouth, mandibles, 

 aud palpi at the base testaceous, apical joint of the last, fuscous. 

 Head very little narrower than the thorax, sub-rotundate, rather 

 convex behind, thickly and finely punctate, more widely on the 

 forehead, front with a minute obsolete longitudinal foveolet. Thorax 

 not much narrower than the base of the elytra, sub-rotundate, 

 short, rather shorter than broad, scarcely narrowed behind, the 

 angles more than the sides rounded, base slightly rounded, sub- 

 convex, base scarcely impressed, the back with an obsolete rather 

 slender depression or channel, sometimes imperceptible, thickly, 

 closely, and finely punctate. Elytra quadrate, the sides straight, 

 about a third longer than the thorax, not quite flat, shoulders 

 rather prominent, the apex at the exterior angles slightly excavated, 

 and the angle produced into a distinct prominent tooth-like pro- 

 cess ; very thickly, closely, finely, but distinctly punctate, clothed 

 with a more distinct griseous pubescence, less shining, concolorous. 

 Abdomen narrower than the apex of the elytra, sub-parallel, 

 shining, of a deeper black, first three segments above finely and 

 thickly punctate, 4th with fewer punctures, 5th smoother but 

 scarcely less punctate than the 4th, 6th again thickly punctate, 

 the apex scarcely piceous ; in the variety, apical half of the 5th, 

 the 6th entirely, and the anus ferruginous. Legs nigro-piceous, 

 femora and tibiae darkest, anterior tibiae sometimes rufo-piceous; 

 tarsi flavescent; in the variety entirely ferrugineo-testaceous. 



In one specimen, the 6th segment above has in the middle, a 



