CERAMBYCID/E 335 



ting Dectes and Colobothea for the present only in Valenus Csy., Ce- 

 ratographis Gahan and Chcetanes and Phrissolaiis Bates. Another 

 of the more important characters distinguishing Graphisurus from 

 Acanthocinus is the much greater length of the basal joint of the hind 

 tarsi in the former. Although there are remarkable antennal 

 differences to be noted among the rather numerous species of 

 Graphisurus, I cannot find any good reason for dividing them further 

 than subgenerically; those species known to me may be defined as 

 follows : 



Male antennae simple; body smaller as a rule. Atlantic to Pacific. 

 (Graphisurus in sp.) 2 



Male antennae with an external knob at the apex of the fifth joint, the 

 eleventh joint without vestige of terminal appendage; ornamentation 

 similar. Pacific and Sonoran regions. (Subgen. Canonura nov.) . .9 



Male antennae with an external knob at the apex of the fourth joint, the 

 eleventh not appendiculate; body broader, flatter, more oblong and 

 with strongly modified ornamentation, which is however derivable 

 from the type prevailing in the two preceding groups. Atlantic 

 region. (Subgen. Tylocerina nov.) II 



2 Elytra narrowly and very obliquely truncate at tip and having barely 

 a vestige of raised discal lines or rows of dark spots 3 



Elytra broadly rounded at tip and with more or less feebly raised lines 

 which bear small spots of blackish tint 4 



3 Body oblong, moderately convex, the elytra flattened between the 

 vestigial lateral lines; color blackish, sometimes paler, with cinereous 

 and blackish vestiture, the latter forming three irregular oblique 

 fasciae on each elytron and some basal spots, the pronotum irregularly 

 maculate and with two more distinct tumid blackish subapical 

 spots; antennae (9 ) one-half longer than the body, with joints three 

 to six gradually diminishing in length; prothorax nearly two-thirds 

 wider than long, the lateral prominence acutely spiculiform and at 

 basal third; elytra oblong, parallel, much wider than the prothorax, 

 rapidly and subcircularly rounded at apex; fifth ventral (9 ) with a 

 rounded emargination, fully as deep as wide, fringed with very short 

 hairs, the last dorsal gradually almost rectilinearly narrowed through- 

 out to the finely pointed apex, much shorter than the long black 

 egg-tube, as usual in the genus; male not at. hand. Length (9) 

 11.5-13.8 mm.; width 3.6-4.3 mm. New York to North Carolina. 



obsoletus Oliv. 



Body more elongate, larger in size and rather more convex, similar in 

 color and maculation, except that the oblique fasciae of the elytra 

 are more widely separated; antennae (9 ) similar, except that joints 

 three to six decrease more rapidly, thence of equal length to the tip, 

 or (cf ) two and one-half times as long as the body, more densely 

 fimbriate beneath and with the outer joints gradually though slowly 

 increasing in length, the eleventh two-fifths as long as the body; 

 prothorax less transverse, one-half wider than long, otherwise 



