172 MANDIBULATA. COLEOPTERA. 



Black, shining, thorax slightly aeneous : clypeus punctured ; towards its hinder 

 margin arise two long arcuated reclined horns, which are united at the base 

 by a transverse line : thorax finely punctured, smooth anteriorly, depressed 

 in the centre, and on each side: elytra finely punctate-striate, each slightly 

 pubescent: tarsi and base of antennas dull ferruginous. Female with two 

 transverse elevated lines on the clypeus. 



The only indigenous example of this fine and remarkable species 

 which I have seen is contained in the rich cabinet of Mr. Eentley, 

 who obtained it from that of Mr. Stone. It was captured in Oc- 

 tober, 1826, in the New Forest, Hants, near Brockenhurst. 



Sp. 2. Vacca. Virescenti-wneus, clypeo subemarginato elytris ochraceis, viridi 

 punctatis ; occipite lineis duabus elevatis, postice ad angulos laterales utrinque in 

 cornu producta. (Long. corp. 3^ — 4 lin.) 



Sc. Vacca. Linne. — On. Vacca. Steph. Catal. 105. No. 1091. 



Greenish-brass, slightly glossy : clypeus slightly emarginate anteriorly, villose, 

 somewhat rugose and punctate, with a slightly lunate transverse carina on the 

 vertex, and a second towards the posterior edge, the last terminating on each 

 side in a short obtuse horn: thorax villose, retuse anteriorly, transversely ex- 

 cavated, with an obtuse lobe in the centre : elytra obscurely striated, ochra- 

 ceous, very sparingly punctate with greenish, the suture also greenish. 

 Female with the carina? on the clypeus simple. 



On. Vacca differs from the following insect by being rather narrower in pro- 

 portion to its length, in having the posterior carina of the clypeus distinctly 

 shorter than the anterior, with the horn at its extremity larger than in On. 

 medius: the elytra are very sparingly punctate with greenish, and the 

 thorax is more villose. 



Rare : it has been taken in Norfolk and Suffolk, but I believe 

 not in the vicinity of London ; certainly not in Battersea-fields ; 

 the insect said to be there found being On. medius. I have not 

 seen above six indigenous specimens, three of which I possess. 



Sp. 3. medius. Virescenti-oeneus, clypeo rotundato, ohtuso, subrugoso, elytris 

 griseis, maculis majorihus ameo-nigris coiifluentihus, occipite spina gemma 

 brevi. (Long. cofp. 3 — 44 lin.) 



Co. media. Illiger— On. medius. Steph. Catal. 105. No. 1092. 



Greenish-brass, obscure: clypeus rounded, with the anterior margin reflexed, 

 obtuse, subtruncate, above thickly rugose-punctate throughout, and in the 

 male furnished with a slightly bent carina on the vertex, and a second 

 behind, terminating at each extremity in a short spine, as in On. Vacca: 

 thorax bronzed-black, granulated, excavated anteriorly, with a small central 

 glossy lob«.;; elytra griseous, punctate-striated, with the disc thickly spotted 

 with deep black-bronze clouds, dispersed in longitudinal streaks : body be- 



