CERAMBYCID.E 239 



A Similar but still more elongate, with narrower and less transverse 

 prothorax, less approximate eyes and still smaller head, the scu- 

 tellum larger, broader and more rounded; eyes separated by two- 

 thirds their own width; elytra fully twice as long as wide; tarsi 

 similar. Length ( 9 ) 41.0 mm.; width i6.omm.; length and width 

 of the prothorax 6.0X12.3 mm. Locality unrecorded. 



prolixus n. subsp. 



Form much stouter, larger, black, the elytra rather abruptly dull rufous 

 in apical two-thirds; head more developed, two-thirds as wide as 

 the prothorax, the eyes separated by three-fourths their width, 

 the mandibles notably larger and thicker; antennae much shorter, 

 scarcely extending to basal third of the elytra, the last joint as long 

 as the preceding but narrower; prothorax relatively much narrower 

 and less transverse though similar otherwise, the scutellum similar; 

 elytra much broader, with the arcuate sides more narrowly rounding 

 behind, nearly two-fifths wider than the prothorax, two-thirds 

 longer than wide; tarsi and metasternum similar; body beneath 

 black, the abdomen red. Length (9 ) 47-O mm.; width iS.o mm.; 

 length and width of prothorax 6.7X12.5 mm. Indiana. 



bicolor n. sp. 



13 Species of the Atlantic regions. Body rulo-piceous in color, shining, 

 the prothorax sparsely punctulate, transverse though less so than 

 in pocularis, scarcely more than twice as wide as long, strongly 

 bisinuate at base, the lateral teeth rather prominent, the posterior 

 angles right; elytra wider than the prothorax, coarsely punctate, 

 the raised lines obsolescent; antennae (cf ) slightly shorter than the 

 body, stout, imbricate, the joints obliquely sinuate, prominent 

 internally. Length 35.0 mm. Georgia obliquicornis Lee. 



Species of the Sonoran and Pacific regions 14 



14 Last antennal joint normal, not at all appendiculate 15 



Last antennal joint (cf 1 ) extremely long, slender, sometimes appendicu- 

 late 22 



15 Apical margin of the prothorax transverse, not or scarcely at all 

 sinuate, the finely pointed apical teeth projecting without sensible 

 obliquity and nearly in line with the apical margin; basal angles 

 prominent and acute, obliquely truncate postero-externally 16 



Apical margin broadly but sensibly sinuate, anteriorly prominent at the 

 sides and thence posteriorly oblique to the apex of the anterior 

 teeth 19 



16 Head and prothorax relatively unusually developed for this group; 

 body large, rather stout and convex, subparallel, the sides of the 

 elytra converging slightly behind to the rather broadly rounded 

 apices; color piceo-castaneous throughout, rather shining; head 

 almost half as wide as the elytral base, the tempora but feebly 

 converging behind the rather feebly convex eyes, which are separated 

 by three-fourths their width, large, with very moderate emargi- 

 nation; antennae (cf) very stout and imbricate basally, two-thirds 

 as long as the body, the last joint fully as long as the preceding but 

 narrower, four times as long as wide, with straight and parallel 

 sides in apical half, the lower side thence oblique and straight to 



