CERAMBYCID^E 235 



scutellum wider than long, parabolic; elytra at base about a fourth 

 wider than the prothorax, the sides thence but very feebly converging 

 to the broadly rounded apices, rather loosely punctate, very finely 

 externally, more coarsely and irregularly toward the suture, the 

 raised lines barely traceable, three-fifths longer than wide; meta- 

 sternum with coarse luteous-yellow pubescence throughout, some- 

 what sparser in a small central area; tarsi stout, the pads of the 

 posterior finely silicate, those of the middle tarsi entire, the sulcus 

 barely traceable. Length (c?) 46.0 mm.; width 19.7 mm.; width of 

 head 10.0 mm. A single example without indication of locality. 



validiceps n. sp. 



Hind angles of the prothorax acute, sometimes slightly prominent and 

 dentiform as usual 6 



6 Hind angles obliquely truncate, so that the posterior denticle is 

 obviously in front of the line of the base; median tooth very stout, 

 its anterior slope making an angle of about 45 with the line of the 

 base 7 



Hind angles not obliquely truncate, the posterior denticle about in the 

 prolongation of the line of the base, with which the anterior slope 

 of the much longer and more acute median tooth makes an angle 

 which is very much less than 45 9 



Hind angles obliquely truncate as in 7, but with the middle teeth slender 

 and abrupt in formation or spiniform as in the calif ornicus group. . 10 



7 Prothorax large, very convex, with the base strongly arcuate medially; 

 body large and very stout, convex, strongly shining, black, the legs 

 and abdomen blackish-castaneous; head moderately large, very 

 slightly swollen basally beyond the scarcely convex eyes, which are 

 separated by slightly more than their own width; antennae (9) 

 piceous-black, the last joint shorter than the preceding, oval, twice 

 as long as wide; prothorax barely at all more than twice as wide as 

 long, polished, with rather numerous small but deep punctures and 

 several large impunctate areas, the median teeth very acute, turned 

 upward outwardly and distinctly reflexed or hamate, their anterior 

 slope biprotuberant; anterior angles oblique, the apical tooth dis- 

 tinctly behind their anterior limit; scutellum large, almost circularly 

 rounded, barely impressed along the middle; elytra at base a fifth 

 wider than the prothorax, three-fifths longer than wide, the sides 

 rather strongly, evenly arcuate, narrowing a good deal toward the 

 somewhat narrowly rounded apices, the raised lines barely traceable, 

 the punctures sparse, rather small, becoming coarser and rugulose 

 near the suture behind the middle but not at tip, the sutural angles 

 evident though but slightly dentate; tarsi not notably stout, the 

 posterior finely, deeply canaliculate beneath, the intermediate canal- 

 iculate basally but scarcely at all thence through the third joint; 

 anterior and middle femora strongly compressed; metasternum 

 glabrous, very finely, not densely punctulate and slightly pubescent 

 laterally. Length (9) 49-O mm.; width 21.0 mm.; width of head 

 9.0 mm.; length of prothorax 9.0 mm. New Mexico (Fort Win- 

 gate), Shufeldt tumidus n. sp. 



