Memoirs on the coleoptera

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
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