—30— 



diniciiU to separate and Dr. Horn has kindly eommunicaled the follow 



ing table to us: 



Abdomen almost glabrous sanguinicoUis. 



Alxlomen rather densely clothed with cinereous, slightly yellow pubescence. 



fuscipennis. 



C, sanguinicoUis Oliv. Ent. IV, 74, p. 9, t. i, fig. 7; Cliev. .\nn. Fr., 1862. 

 p. 257 (Pi. Ill, fig. 19). I^ength .40 in. = 10 mm. Hab. U.S., east of Rocky Mts. 



C. fuscipennis T^c. Proc. .\c. Phil., 1861, p. 356. Length .40 in. = 10 mm. 

 I 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 testaceou.s. The variability in their coloration has given rise to a 

 considerable synonymy. 



SYNOPSIS. 



Proihorax narrower, angulated at sides; elytra testaceous longicollis. 



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



bimaculatus. 

 M. longicollis Ia»c. .S.M.C, No. 264, p. 193. lAjngth .32 in. -= 8 mm. llah. 

 California. 



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

 l,ec. Ann. Lye, I, p. 172, t. 11, f. 12; obscui-us hec. J.A.P., ser. 2, 11, p. 21. 

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



M. corniUM., Trans. Am. Phil.,X, 1847, P- 45; I-ec. 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 Cornus. 



M. semiuslus Newn. Ent. p. 19; Lee. J. A P., ser. 2, II, p. ^S, is a 

 \M\eiy of M. dmacti/a/us with the greater portion of the surface rufo- 

 lestaceous (PI. Ill, Vol. I, fig. 20). It occurs at St. John's Bluff, K. I'la. 



RHOPALOPHORINI. 



RHOPALOPHORA Sew. 



This, the unl\- 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, antenna^ slender with 4ih 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, ist joint of hind tarsi twice 

 as long as 2d. 



siwopsis OF liUorALurnouA. 



Thor.ix impunclurcd laevicollis. 



Thorax punctured. 



Thorax broader, strongly bi-impressed longipes. 



Thorax narrower, transversely plicate and rugose rugicoUis. 



