R. laevicollis I.tt. S.M.C., No. 264, p. 193. Length .48111. = 12 mm. Ilah. 

 'I'e.\as and New Mcx. 



Larger than any other species in our fauna and easily known hy 

 the impunctuicd tliorax, which is distinctly constricted on the side 

 at base. 



R. longipes Say, J. A. P., Ill, 1823, p. 426; Lee. J.A.P., ser. 2, II, p. 20; 

 I'roc. Ac. Phil., VII, 1854, p. 218; amabilis Dej. Cat. 3d ed., p. 359; poi-osa White- 

 Longic, VIII, 2, p. 206. Length .30 m. = 7.5 mm. Mah. Col., Penn., Kan«., 

 Mo., Neb. 



The elytra are sometimes armed at tip. 



R. rugicoUis I-ec. Proc. .\c. Phil., 1858, p. 83. Length .38 in. = 9.5 mm. 

 I [ab. Texas. 



Distinguished from preceding by the form and sculpture of the 

 thorax. 



ANCYLOCERINI. 



ANCYLOCERA Seiv. 



This, also the only genus of the tribe contains a single species, a 

 very dainty insect, black with scarlet elytra and abdomen and the long 

 slender legs and clubbed thighs which make the preceding genus con- 

 spicuous. The body is slender, head short and prothorax very long 

 compared with the cylindrical elytra. The antennae are serrate, more 

 noticeably the inner joints, i as long as the body in Q , and longer than 

 .same in (^. The hind pair of thighs is armed with a terminal spine. 



A. bicolor Oliv. Ent. IV, 1795, 68, p. 32, t. 3, f. 25; Casteln. Hist. Nat. II, 

 p. 431; rugicoUis Fab. Syst. El., II, p. 317; Lacord. Gen. Atl. X, t. 93, f. 5; Lcc. 

 J.A.P., ser. 2, II, 1850, p. 19; lividipennis Hald. Trans. Am. Phil. X, 1847, p. 44. 



Length .50 to .70 hi. = 12.5 to 18 mm. Hab. Southern States from \oitli 

 Carolina to Texas. (PI. Ill, fig. 22, Vol. I.) 



PARISTEMIINI. 



The characters separating this tribe will be found in liie arrangement 

 of tribes, Bull. Br. Ent. Soc, VIT, p. 114, or more fully discussetl in 

 the Classification p. 294. Two genera are known as under: 



Antennce .short, serrate, nth joint appendiculate Elytrcleptus. 



.■\ntemioc longer, slender, i ilh joint simple Holopleura. 



ELYTROLEPTUS Duges. 

 Contains live species formerly known under the generic name 

 Pteroplatus. The peculiar form of the elytra shown in the figure (Tl. f, 

 fig. i) at once distinguishes the genus and the species may be distinguish- 

 ed by the following 



.S y A OP SIS OF EL YTR OLEP TUS. 



Mlack, elytra black with outer margin broadly fulvous floridanus. 



Black, elytra reddish yellow rufipennis. 



