CERAMBYCID^E 23 1 



4 Prothorax stout, very much narrowed at apex 5 



Prothorax relatively narrower, less conical, only very moderately nar- 

 rowed at apex 6 



5 Tempora much retracted and converging, shining and less punctate 

 behind the eyes, which are notably prominent; vestiture moderate, 

 the head and pronotum finely, sparsely and very inconspicuously 

 pubescent (cf ), or moderately closely and densely but much more 

 conspicuously (9). Female parallel, rather wide and but slightly 

 convex, only feebly shining, the head and prothorax with rather 

 small, very dense punctures, the elytra strongly, rather closely 

 punctate behind the red basal region, which is posteriorly dilated 

 at the sides as usual, the punctures becoming finer, denser and sub- 

 rugulose apically; pubescence of the head shorter than that of the 

 pronotum, on the latter deep golden in color, short, subdecumbent 

 and yellowish-cinereous on the elytra; antennae slender, pale through- 

 out, extending to apical two-fifths of the elytra, the third joint* as 

 long as the fifth, a little longer than the fourth; elytra evidently 

 less than twice as wide as the prothorax and barely four times as 

 long, abruptly very obtuse at apex, the latter becoming transverse 

 toward the slightly prominent sutural angles; under surface finely, 

 closely punctulate and with short even cinereous hairs, the meso- 

 and metasternal parapleura abruptly clothed with longer, dense and 

 brilliant white pubescence. Length (9) 9-5 mm.; width 2.7 mm. 



California (Sta. Cruz Mts.) basalis Lee. 



A Nearly similar but much smaller in size, the antennae (cf ) ex- 

 tending to apical third of the elytra, or ( 9 ) slightly behind the 

 middle of the latter, which are black, with red base in less, or 

 entirely pale and not darker even at apex in more, than half the 

 examples, without intermediates in color, the antennae piceous- 

 black, with the two basal joints pale; thoracic vestiture almost 

 wanting (cf), or rather long, coarse and condensed medially in 

 two longitudinal areas as in basalis, though darker and more fulvous 

 in color (9); sculpture and general form similar, the elytra 

 parallel (9), narrower and distinctly tapering (cf); parapleura 

 of the hind body similarly densely clothed with longer pubescence, 

 which is however yellowish and not pure white. Length 6.8- 

 8.2 mm.; width 1.9-2.5 mm. California (Sta. Barbara), Dunn. 



Abundant dichroma n. subsp. 



Tempora slightly shining though rather strongly punctate, much less 

 retracted and nearly parallel behind the eyes, which are less prom- 

 inent; body (cf ) much larger, nearly similar to basalis in sculpture 

 and color throughout, the elytra black, red at base; legs as in di- 

 chroma, the anterior red with black tarsi, the two posterior black, 

 with the femora testaceous in basal three-fourths and half respec- 

 tively; in the female of basalis similar, except that the entire hind legs 

 are black; pubescence of the head and prothorax longer, coarser, 

 denser and more conspicuous than in any of the preceding, yellow- 

 fulvous in color, the median line of the pronotum in a deep valley 

 between the lines of dense heaped-up vestiture; antennae blackish, 

 the two basal joints pale, slender, extending but little beyond the 



