104 MANDIBULATA. — COLEOPTERA. 



the base punctulate, and marked with a deep longitudinal impression on each 

 side : the elytra are deeply striated^ the striee crenulated. It varies in being 

 rather dusky. — Marsham's MSS. 



I Strongly suspect that this apparent species is merely an imma- 

 ture state of the last-described, as I have a variety of Ar. longicoUis 

 that agrees exactly with this in colour, but has its own peculiar 

 sculpture, while Ar. Scalesii has that of insequalis : it occurs near 

 London. 



Sp. 5. longicollis. Niger, nitidis, thorace subcordato-oblongo, postice jmnctuluto 

 striold unicu utrinque impresso, elytris punctaio-striatis, antennis pedibusque 

 riijis. (Long. corp. 2i — 3 lin.) 



Ca. longicollis. Duftschmidt.—Kr. lon^icoWis. Steph. CataLp.21. No. 167. 



Black, shining ; the thorax subcordate;, elongate, anteriorly very smooth, glossy, 

 posteriorly punctulated, with a longitudinal impression on each side towards 

 the hinder angles : elytra ovate, striated, the striae crenulated, the interstices 

 smooth, without any impressed dots on the third from the suture, the margin 

 obsoletely punctated : body beneath pitchy-black : antennae, palpi, and legs 

 rufous. 



Not a very common species ; taken near London ; and I have 

 received it from the Rev. F. W. Hope, who finds it near Southend. 



B. Elytra with an abbreviated stria at the base, near the suture. 



Sp. 6. diligens. Niger, nitidus, antennis hasi pedibusque rufo-piceis, thorace 

 postice impunctuto, utrinque striold unicd impressa. (Long. corp. 2^ — 2^ Un.) 

 PI. diligens. Sturm. — Ar. diligens. Steph. Catal. p. 21. No. 168. 



Rather elongate : deep shining black : head and thorax impunctate, the latter 

 with a deep longitudinal impression on each side at the base, near the hinder 

 angles, and a strong dorsal channel : elytra rather ovate, punctate-striated, 

 with three deep impressions on the disc: body beneath pitchy-black, legs 

 rufous : antennae dusky, the basal joint rufous. 



Taken by myself near London, but I am not aware of its true 

 locality. 



Sp. 7. interstinctus. Niger, nitidus, antennis pedibusque rufo-piceis, thorace 

 subcordato, postice punctulato, elytris punctis sparsis impressis. (Long. corp. 

 2^—3 lin.) 



PI. interstincta. Sturm. — Ar. interstinctus. Steph. Catal. p. 21. No. 169. 



Glossy black : head smooth ; thorax subcordate anteriorly, but punctate pos- 

 teriorly, with a longitudinal impression at the base on each side, and a 

 dorsal channel : elytra oblong-ovate, deeply striated, the striae punctate, with 

 several irregularly scattered impressed dots on the disc, and an interrupted 

 series on the margin : body beneath pitchy-black : legs and antennae pitchy- 

 red, the former with the tips of the joints dusky. 



