56 MANDIBULATA. — COLEOPTERA. 



Sp. 17. nitens. Ovatus, viridis, elytris auren out cupreo marginatis, cpstis 

 tribus elevatis atris, interstitiis transversim rugosis. (Long. corp. 8 — 10 

 lin.) 



Ca. nitens. Linne. — Sowerhy, Brit. Misc. i. pi. 27.—Sieph. Catal. No. 77. 



Head shining green-gold, thickly punctulated, with an impression on each side 

 between the eyes : thorax suhquadrate, a httle emarginate in front, and 

 deeply so behind : the posterior angles rounded ; above glossy greenish-copper, 

 or golden, thickly rugose, punctate, slightly channelled in the middle, and at 

 the base on each side an obsolete impressed foveola: elytra ovate, convex 

 above, silken-green, with the margin splendid red-copper j on each three 

 equidistant, stout, smooth, much elevated, blue-black ribs, and one on the 

 suture, giving the appearance of seven ribs only ; these ribs are very fre- 

 quently more or less intercepted, and the interstices are always strongly rugose 

 transversely : the body beneath is shining black : the legs, mouth, and palpi 

 are black: the four basal joints of the antennae are glabrous and black, the 

 rest pubescent and brownish. 



This brilliant insect notably evinces the advancement of our 

 knowledge of the localities of insects within these few years ; so 

 recently as the year 1816, the more extensive collections only pos- 

 sessed merely a single specimen of Ca. nitens, and now every small 

 collection may literally be said to abound with specimens. At that 

 period a few had been taken in the New Forest by the late Mr. 

 Bingley, and Sowerby had announced that the insect was to be 

 found on heaths near Durham : — now, through the zeal and in- 

 dustry of Mr. Dale, it is found to be extremely common on Parley 

 and Pools heaths, Hants and Dorsetshire. It also occurs not un- 

 frequently on heaths in the mountainous districts of Westmoreland 

 and North Wales. Mr. Backhouse, of York, informs me that it is 

 found on Stockton common, within four miles of that city; and 

 the Rev. G. T, Rudd has received it from Eston Nab, in the same 

 county. 



Genus XIX. — Calosoma, Fabrickis. 



Labruvi deeply emarginate : mandibles arcuate, with a tooth at the base : max- 

 illw incrassated at the tip : internal 7naxiUary palpi projecting beyond the 

 apex of the maxilla, composed of two equal joints, external with the basal 

 joint minute, second elongate, clavate, third and fourth equal, the latter sub-- 

 securiform, truncate: labial palpi with the two basal joints short, third elon- 

 gate, fourth securiform, truncate : labitnn short, broad, the upper margin 

 setose, acuminated : mentum sublinear, rounded laterally, unidentate in the 

 middle. Antcnnoe linear, second joint shortest, third longest, compressed : 

 thorax transverse, suborbiculato : nbd'jmcn subquadrate, convex: wiiisfs two: 

 anttyior tarsi of males dilated. 



