CERAMBYCID.E 367 



rounded; under surface, legs and antennae nearly as in insignis. 

 Length ( 9 ) 16.7 mm. ; width 5.0 mm. California (Los Angeles Co.). 



diruptus n. sp. 



Of insignis Lee., the two males and two females before me serve 

 as a very good criterion for estimation of specific value in the other 

 forms. I obtained four males of incongruens on a low tree on one 

 occasion but could never find more of them and do not know the 

 female; diruptus may be more properly a subspecies of insignis than 

 a distinct species. 



Neoclytus Thorns. 



This genus is not quite so well defined as the preceding, but may 

 nearly always be clearly recognized by the longitudinal areas or 

 lines of transverse carinules on the pronotum and the shorter, 

 steeper and unmodified front, without carins either medial or 

 supra-antennal ; this serves to distinguish it very well from Xylo- 

 trechus but is not always so decisive in regard to Clytanthus . It 

 includes two moderately definite groups, one, represented by such 

 species as luscns, devastator and scutellaris, having long terminal 

 spines on the femora, and the other, including such forms as con- 

 junct-us, erythrocephalus and muricatulus, which either have the 

 terminal spines very short or altogether wanting as in Xylotrechus. 

 The two following species have the femora as in the second of 

 these groups: 



Neoclytus fulguratus n. sp. (Thomson i. litt.). Form and general 

 structure nearly as in longipes but stouter and with fewer and shorter 

 bristling erect thoracic hairs, dark brownish-piceous in color throughout, 

 the elytra a little less dark; condensed areas pure white; antennae (cf) 

 slender, filiform, barely half as long as the body, the second joint about 

 half as long as the third, the latter slightly longer than the fourth and 

 very much shorter than the first; prothorax about a fourth longer than 

 wide, parallel, with evenly and moderately arcuate sides throughout, 

 the apex slightly arcuate, subequal to the base; surface densely and 

 strongly punctato-rugulose and with three tolerably regular series of 

 well spaced transverse carinules, the vestiture sparse and even, excepting 

 a small condensed point near each side at the middle of the length, more 

 distinct than in longipes; elytra barely wider than the prothorax and 

 twice as long, feebly tapering, the apices obliquely truncate, with obtuse 

 blunt angles; surface with scattered coarse white decumbent hairs, 

 denser indefinitely at base and along the suture to the middle, this vitta 

 having a short broad offset near basal third and, just behind this, an 

 entire transverse fascia, which is strongly and anteriorly angulate sub- 

 medially and thence more posteriorly oblique to the sides; also, at apical 



* 



j LIBR / 





