394 NORTH AMERICAN COLEOPTERA—LINELL. volxix. 



Tarsi broad, parallel; first Joint of the posterior pair slightly louoer 

 than second and third together. Length, 14 mm. 



Type.— :so. 202, U.S.N.M. - 



Of this handsome, strikingly distinct species twenty examples were 

 collected by Mv. D. W. Coipiillett in the montli of July in the foothills 

 bordering Mohave Desert on the south, Los Angeles County, California. 

 It resend)les 7^^. nicest iim, Le Conte, but may be at once distinguished by 

 the uuarmed antenna',the coarser white vestiture, and the elytral fascia. 



Genus PIEZOCERA, Serville. 



Lacordaire's group Piezocerides is closely allied to Ibionides, differing 

 only by the serrate antennae The principal generic characters of Piezo- 

 cera are the strongly compressed tibia' and the flattened antennal tuber- 

 cles, separated on the front oidy by a fine, impressed line. Four or five 

 tropical American si)ecies are described, and one, P. monochroa, Bates, 

 from Almalouga, ^lexico. This latter is closely allied to the following 

 Texan species, but judging from Bates' description has a different 

 thorax. 



PIEZOCERA SERRATICOLLIS, new species. 



Linear, uniformly dark castaneous, shining, sparsely covered with 

 long erect hairs. Antenniie three-fourths the length of the body, from 

 the third joint strongly flattened, serrate, bicarinate on both sides and 

 with an additional short median carina at apex of each joint; third to 

 tenth joints subequal in length, triangular, longer than broad; eleventh 

 joint longer, obtuse at apex. Thorax twice longer than broad, broadly 

 and strongly constricted at base, slightly concave and smooth before 

 the constriction at middle, with an obtuse smooth tubercle each side 

 of the concavity; disk with sparse setiferous punctures; sides broad- 

 est before the basal constriction and slightly narrowed to apex, with 

 numerous setiferous tubercles, making the margin appear crenulate 

 if seen from above. Elytra broader than thorax, subparallel, longi- 

 tudinally impressed on the disk alongside the suture, with sparse 

 setiferous punctures arranged subseriately ; intervals nearly smooth ; 

 apices strongly obliquely truncate inward, the angles rounded. Legs 

 sparsely hairy; femora moderately clavate, nearly smooth; tiui:e 

 strongly compressed and carinate, with a series of coarse punctures 

 along the exterior side; tarsi broad, short; first joint of the posterior 

 pair one-half longer than the second. Length, <! mm. 



One example, collected by Prof. C. H. T. Townsend at Brownsville, 

 Texas. 



Tj/j>e.— Xo. 203, U.S.N.M. 



IBIDION EXCLAMATIONIS, Thomson. 



Two examples of this species, previously recorded from Almalpnga, 

 Mexico, are in the National Museum, collected by Prof. C. H. T. Townsend, 



