— 6i — 



Mesosternum declivous, body robust Perarthrus. 



Mesosternum protuberant, body slender Ischnocnemis. 



The structural characters are so described by above schedule that 

 they will not be rehearsed in the specific descriptions. The student is 

 referred to the "Classification" for further characters. 

 CALLICHROMA 1 at. 

 The prothorax is very rugose and armed with a strong lateral spine 

 and the scutellum is moderate in size. 



SYNOPSIS OF CALLICHROMA. 

 Thighs orange; 



Elytra and parts beneath except abdomen and legs metallic green, tinged with a 



coppery hue splendidum. 



Metallic green only plicatum. 



Front and middle thighs black, elytra blue cobaltinum. 



Thighs black, elytra velvety black melancholicum. 



C. splendidum Lee. J.A.P., ser. 2, II, 1850, p. 37; Dej. Cat., 3d ed. p. 349; 

 elegans Hald. Trans. Am. Phil., X, 1847, p. 31. 



Length 1. 25 to 1.50 in. = 28 to 40 mm. Hab. Southern States. (PI. , fig. 4.) 

 The coppery hue which is always distinct on the thorax, sometimes 

 is spread entirely over the elytra and this form is traditionally known as 

 virescens . 



C. plicatum Lee. Proc, Ac. Phil., VI, 1853, p. 233. Length 1 to 1.5 in. = 

 25 to 40 mm. Hab. Texas. 



C. cobaltinum Lee. S.M.C., No. 264, 1873, p. 195. Length 1 to 1.5 in. = 

 25 to 36 mm. Hab. Lower California. 



The transverse rugse of the prothorax are not so coarse as in the two 

 preceding species and the anterior transverse constriction is more regular 

 and stronger. 



C. melancholicum Bates. Trans. Ent. Soc, London, 1872, p. 186; Chew 

 Mss. Length 1.25 inch. = 30 mm. Hab. Mexican Boundary. 



All velvety black, except the legs and antennae, which are shining. 



MEGADERUS Serv. 

 M. bifasciatus Dup. Mag. Zool. 1836, CI. IX, p. 5, t. 141, f. 2; Lee. J. A. P., 

 ser. 2, II, 1852, p. 176; Dej. Cat., 3d ed., p. 344; corallifer Newn., Mag. Nat. Hist. 

 ser. 2, IV, p. 195; Hald. Stansb. Expl. App. t. 9, f. 15. Length 1 in. = 25 mm. 

 I lab. Texas, Ariz. 



Black, tibiae and elytra parti}' rufous, but very variable in the arrange- 

 ment of the color. The thorax is very roughly punctured and the scu- 

 tellum large and acutely triangular. (PI. , fig. 5.) 

 DENDROBIAS Serv. 



D. mandibulars Serv. Ann. Ent. Soc. Fr., 1834, ser. 1, III, p. 42; Dup. 

 Mag. Zool. 1836, IX, p. 23, pi. 151, f. 1, tf; 4-maculatus Klug, Dej. Cat., 3d ed. 

 p. 345; Dup. I.e., p. 22, pi. 151, f. 2; basalis Dup. I.e., 1840, XIII, p. 6, pi. ^; 

 lestaceus Dup, i.e., IX, p. 24, pi. 152, f. 1; Lac. Gen. Col., 1869, IX, p. 201, note 

 1; sartorius Hoppner, Dej. Cat., 3ded., p. 345. Length .80 to 1.20 in. = 20 to 30 

 mm. Hab. Cal., Tex., Ariz., New Mex. and Mex. 



I'.ntomologica Americana, Vol II. '.' June 1886. 



