Nacerdes } HETEROMERA. By 61 
N-. melanura, Schmidt (lepluroides, Thunb.). Elongate, subparallel, 
reddish-testaceous, with the apex of elytra, femora, breast and abdomen 
black, rarely entirely fuscous; head with eyes as broad as thorax, 
antennz long and slender; thorax rather shining, cordiform, more so in 
male than in female, in the former sex being furnished with a black spot 
on each side, closely and distinctly punctured except on centre of disc ; 
scutellum truncate behind ; elytra dull, parallel, very closely punctured, 
clothed with short and fine yellowish pubescence, with traces of raised 
lines. L, 7-12 mm. 
Male with the antenne 12-jointed, the last ventral segment of 
abdomen bilobed, and the centre of forehead and spots on thorax 
fuscous. 
Female with the antennx 11-jointed, the last ventral segment of the 
abdomen broadly and slightly emarginate, and the thorax unicolorous. 
On old posts and ti:nber on the sea shore and near the mouths of large rivers ; 
sometimes introduced further inland with timber; rather common locally ; Surrey 
Canal and Peckham (probably introduced with timber) ; Harwich; Doverscourt ; 
Walton-on-Nuze; Chatham; Sheerness; Gravesend; Southend; Deal; Dover; 
Folkestcne ; Hastings; Portsmouth ; Southampton (about rotten railway sleepers) ; 
Isle of Wight ; Devonshire, Plymouth, &c.; banks of Humber and Severn; Borth, 
Wales; Bridlington jetties; Manchester; Northumberland and Durham district, 
Sunderland, and on the wing near South Shields; Ireland, Glasnevin Gardens, 
Dublin. 
ISCHNOMERA, Steph. (Asclera, Schmidt ) 
The members of this genus may be known by the strongly securiform last 
joint of the maxillary palpi, and the oval, almost round, eyes, which are 
very slightly emarginate in front; the antenne are filiform and elongate 
with the third joint about twice as long as the second; the head is 
scarcely produced before antenne ; the thorax is rather strongly nar- 
rowed at base, and the clyfra are long and parallel-sided ; the legs are 
long and the claws plainly toothed at base ; all the tibiz are armed with 
two spurs at apex ; the genus contains about fifteen species, six of which 
occur in Europe, and the remainderin Japan, North America, Cuba, the 
Australian region, &c.; two are inhabitants of Britain. 
The larva and pupa of I. ewruleaare described and figured by Sch‘édte (xi. pp. 545— 
547, t. xvi. 11, 12 and 13); the larva so closely resembles a rather small larva of 
NV. melanura, that it might well be mistaken for it; it appears chiefly to differ in 
having the head rather narrower and more exserted, the prothorax more produced in 
front, and the first three abdominal segments angled in middle of sides; the remain- 
ing segments, also, are more conical; the pupa differs considerably from that of 
Nacerdes, having the cephalic region rounded, and being thickly furnished with stout 
setose ‘‘ styli motorii,” which are almost absent in the latter pupa; the larva mines 
dead wood. 
I. Thorax green, or bluish-green, unicolorous with elytra . I. cm#ruLza, ZL. 
If. Thorax bright red or yellowish-red . . . . . . . J. SANQGUINICOLLIS, F, 
I. coerulea, LL. Elongate, parallel-sided, blue-green or blue, a little 
shiny; head large, eyes large and prominent projecting beyond anterior 
angles of thorax, front distinctly but rather finely and not very closely 
