—30— 



difficult to separate and Dr. Horn has kindly communicated the follow- 

 ing table to us: 



Abdomen almost glabrous sanguinicollis. 



Abdomen ratber densely clothed witb cinereous, slightly yellow pubescence 



fuscipennis. 



C, sanguinicollis Oliv. Ent. IV, 74, p. 9, t. 1, tig. 7; Chcv. Ann. Fr., 1862, 

 p. 257 (PI. Ill, fig. 19). length .40 in. = 10 mm. Hab. U.S., east of Rocky Mts. 



C. fuscipennis Lee. Proe. Ac. Phil., 1861, p. 356. Length .40 in. = 10 mm. 

 1 lab. California. 



MOLORCHUS Fab. 



Contains two species with very short elytra, dehiscent and separately 

 rounded at tip. The color is blackish except the elytra which are more 

 or less testaceous. The variability in their coloration has given rise to a 

 considerable synonymy. 



SYNOPSIS. 



Prothorax narrower, angulated at sides; elytra testaceous longicollis. 



Prothorax broader, rounded at sides; elytra more or less blackish at tip and margin... 



bimaculatus. 

 M. longicollis Lee. S.M.C., No. 264, p. 193. Length .32 in. — 8 mm. Hab. 

 California, 



M. bimaculatus Say, J. A. P., Ill, 1823, p. 428; Newn. Ent., p. 20; qffinis 

 Lee. Ann. Lye, I, p. 172, t. 11, f. 12; obscurus Lee. J.A.P., ser. 2, II, p. 21. 

 Length .20 to .32 in. = 5 to 8 mm. Hab. U.S., except Pacific Slope. 



M. corniHM., Trans. Am. Phil.,X, 1847, p. 45; Lee. J. A. P., ser. 

 2, II, p. 21, is a variety with the thorax rufous, found in North Carolina 

 and Alabama upon the flowers of Corn us. 



M. semiustus Newn. Ent. p. 19; Lee. J. A P., ser. 2, II, p. 38, is a 

 variety of M. bimaculatus with the greater portion of the surface rufo- 

 tcstaceous (PI. Ill, Vol. I, fig. 20). It occurs at St. John's Bluff, E. Fla. 



RHOPALOPHORINI. 



RHOPALOPHORA Serv. 



This, the only genus of the tribe, contains three species, all slender 

 blackish gray insects with prothorax more or less red. The head is 

 elongate, eyes finely granulate, antennae slender with 4th joint shorter 

 than 3d and 5th. Thorax variable in form and sculpture. Elytra 

 punctate, flat, suddenly declivous at base. Legs very long and slender, 

 thighs suddenly and strongly clubbed at tip, 1st joint of hind tarsi twice 

 as long as 2d. 



SYNOPSIS OF BHOPALOPHOPA. 



Thorax impunctured laevicollis. 



Thorax punctured. 



Thorax broader, strongly l>i-im pressed longipes. 



Thorax narrower, transversely plicate and rugose rugicollis. 



