CERAMBYCID^ 289 



fourth; elytra nearly similar in form but still smoother, fully as 

 convex, without creases or impressions of any sort and wholly 

 without punctures, with exception of a sporadic one or two perhaps, 

 except laterally near the obtusely prominent line of flexure in about 

 basal half, where they are moderately coarse and very sparse, the 

 punctures of the flanks few in number and only moderately coarse; 

 legs more slender, the tarsi much narrower. Length (9) 19.0- 



21.5 mm.; width 7.7-8.7 mm. New Mexico laevigata Bland 



12 Moderately slender, very convex, more or less opaque above, more 

 shining on the flanks and beneath; antennae unusually short, very 

 stout basally, rapidly tapering and without evident annulation; 

 prothorax nearly as long as wide, slightly more narrowed at base than 

 apex, the sides at the usual position of the tubercle slightly angulate 

 but only obtusely prominent, the surface opaque, rugulose, finely 

 punctate, gradually coarsely so basally, transversely plicate near 

 the anterior margin, coarsely punctato-rugose throughout the less 

 opaque flanks; elytra evenly oval, less than twice as long as wide, 

 strongly convex, one-half wider than the prothorax, smoothly 

 undulato-rugose throughout, feebly shining, and with moderately 

 coarse, deep punctures, sparsely placed in the bottoms of the undu- 

 lations from base to apical fourth, and, near the sides, very nearly 

 to the tip, closer and still more asperate on the flanks, the surface 

 more deeply rugose along and near the very obtuse line of flexure; 

 abdomen more shining than the upper surface and with coarse, 

 deep and well separated punctures, equally distributed over the 

 entire surface, the fifth ventral (c? 1 ) broadly sinuate at tip; legs 

 rather shining but rugulose, the very distinct punctures well separated 

 and only moderately coarse, the minute punctulation equal and not 

 dense throughout on the femora. Length (d 71 ) iS.o mm.; width 

 7.7 mm. A single male without indication of locality, .opaca n. sp. 



Opaca has long been in my collection under the name subrugosa 

 Bland, but it does not agree with the description of that species, 

 which is from Cape San Lucas. In subrugosa, for example, the 

 fourth antennal joint is annulate with white, of which there is no 

 trace in the well preserved type of opaca, and again, the coarse 

 punctures near the base of the pronotum are not broadly "diffused" 

 but confined to an irregular transverse line; finally, the abdomen in 

 subrugosa is said to be finely punctured, more sparsely toward the 

 sides. It is possible that opaca may inhabit some part of the Lower 

 California Peninsula, but there is no record. Solida and femoralis 

 are allied to loevigata but are of much heavier build, with larger and 

 much more elongate prothorax. The type of grylliceps the head 

 throughout the genus, with its high vertical front, recalls strikingly 

 the form of that part in the crickets and grasshoppers has, on each 



T. L. Casey, Mem. Col. IV, Oct. 1913. 



