_ 3 I_ 



R. laevicollis Lee. S.M.C., No. 264, p. 193. Length .48 in. = 12 mm. Hah. 

 rexas and New Mex. 



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

 the impunctured thorax, which is distinctly constricted on the side 

 at base. 



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

 Proc. Ac. Phil., VII, 1854, p. 218; amabilis Dej. Cat. 3d ed., p. 359; porosa White 

 Longic, VIII, 2, p. 206. Length .30 m. = 7.5 mm. Hab. Col., Penn., Kans.. 

 Mo., Neb. 



The elytra are sometimes armed at tip. 



R. rugicollis Lee. Proc. Ac. Phil., 1858, p. 83. Length .38 in. == 9.5 mm. 

 Hab. Texas. 



Distinguished from preceding by the form and sculpture of the 

 thorax . 



ANCYLOCERINI. 



ANCYLOCERA Serv. 



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 9. an d 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; rugicollis Fab. Syst. El., II, p. 317; Lacord. Gen. Atl. X, t. 93, f. 5; Lee. 

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



Length .50 to .70 in. = 12.5 to 18 mm. Hab. Southern States from North 

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



PARISTEMIINI. 



The characters separating this tribe will be found in the arrangement 

 of tribes. Bull. Br. Ent. Soc, VII, p. 114, or more fully discussed in 

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



Antennae short, serrate, nth joint appendiculate Elytroleptus. 



Antennae longer, slender, nth joint simple Holopleura. 



ELYTROLEPTUS Luges. 

 Contains five species formerly known under the generic name 

 Pteroplatus. The peculiar form of the elytra shown in the figure (PI. I, 

 fig. 1) at once distinguishes the genus and the species may be distinguish- 

 ed by the following 



SVXOPSIS OF ELYTROLEPTUS. 



Plack, elytra black with outer margin broadly fulvous floridanus. 



Black, elytra reddish yellow rufipennis. 



