— 6i — 



Mesosternum declivous, body robust Perarthrus. 



Mesobternum protuberant, body slender Ischnocnemis. 



The structural characters are so described by above schedule thai 

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

 referred to the "Classification" for further characters. 

 CALLICHROMA I at. 

 The prothorax is verv rugose and armed with a strong lateral sj)inc 

 and the scutellum is moderate in size. 



SYXOPSIS OF CALLICHROMA. 

 'thighs orange: 



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



coppery hue splendidum. 



Metallic green only plicatum. 



!• lont 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; 

 elegaiis 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 copper}- hue which is always distinct on the thorax, sometimes 

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

 vt'rescens. 



C. plicatum Lee. Proc. Ac. Phil., \T, 1853, p. 233. I-ength i to 1.5 in. = 

 25 to 40 mm. Hab. Texas. 



C. cobaltinum I-ec. S.M.C., No. 264. 1873, p. 195. Length i to 1.5 in. 1= 

 25 to 36 mm. Hab. Lower California. 



The transverse rugae of the prothorax are nt>t so coarse as in the two 

 preceding species and the anterior transverse constriction is more regular 

 and stronger. 



C. melancholicum P>a!es. Tran^. Ent. Soc, London, 1872, p. 186; Chev. 

 -Mss. Length 1. 25 inch. =: 30 mm. Hab. Mexican Boundary. 



All velvety black, except the legs and antennre, which arc shining'. 



MEGADERUS Serv. 

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

 >er. 2, 11, 1852, p. 176; Dej. Cat., 3d ed., p. 344; cnrnlUfer Newn., Mag. Nat. Hist, 

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

 Hab. Texas, Ariz. 



Black, tibia; and elytra partl\ 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. mandibularis .Strv. Ann. Ent. Soc. Fr., 1834, ser. i. III, p. 42; Dup. 

 Mag. Zool. 1836, I.X, p. 23, pi. 151, f". I, ^; ^-maculatus Klug, Dej. Cat., 3d ed. 

 V- 345; Dup. I.e., p. 22, pi. 151, f. 2; basalis Dup. I.e., 1840, XIII, p. 6, pi. 33; 

 fes'taceus Dup, I.e., IX, p. 24, pi. 152, f. i; Lac. Gen. Col., 1869, IX, p. 201, note 

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

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



Entomologica Americana, Vol TI. 9 June 1886. 



