Monochammus. | LONGICORNIA. 249 
occurred in Mexico; they are large and conspicuous insects with the 
antenne Icnger than the body, especially in the male, rather robust at 
base, and gradually tapering to apex; the thorax is armed with a sharp 
spine on each side, and the anterior coxal cavities are open behind; the 
elytra are convex, and the legs rather long, with the tibia somewhat com- 
pressed ; about half-a-dozen species have occurred in Europe. 
The larva of I. sartor is described by Schiddte (Pars ix. p. 485); it is broad in 
front and considerably narrowed behind, and differs from the majority of the Lamiide 
in being furnished with very minute legs; the anal segment is transverse with the 
inferior portion sulcate in the middle ; it is found in pine wood. 
I. Scutellum entirely clothed with yellowish-white pubescence ; 
average size larger os <i = i a LOM, Sie eared ia 
II. Scutellum clothed with whitish or yellowish-white pubescence 
with a smooth central line ; average size smaller. . . . . . M.suror, ZL, 
M. sartor, F. 
M. sartor, F. Black, with the elytra slightly eneous; antennz 
long; thorax with a lateral spine on each side; scutellum entirely 
clothed with yellowish-white pilose pubescence; elytra obsoletely im- 
pressed transversely in front, rugosely punctured at base, and very 
obsoletely punctured but thickly pubescent towards apex; in the male 
the elytra are slightly narrowed to apex and are immaculate, and the 
antenne are more than twice as long as the body and black; in the 
female the antenne are not much longer than the body and ringed with 
greyish pubescence, and the elytra are parallel-sided and variegated with 
a few spots of grey pubescence. L, 18-30 mm. 
In timber, and on trunks of trees; very rare, and probably an importation; Lon- 
don, Devonshire, and Norfolk (Stephens) ; Repton (E. Brown); two specimens from 
Cambridge Fens (S, Stevens) ; one specimen taken by a groom in a stable at Boothby 
Graffoe Rectory, and given to Dr, Power by Miss Fullerton ; one in a timber-yard near 
Taunton ; Manchester. 
M.sutor, L. Black, rather convex, mottled with pale pubescence 
on the upper side, and thickly pubescent beneath ; rather smaller on the 
average than the preceding species, and easily distinguished by the fact 
that the scutellum has a smooth glabrous line in the middle, the rest 
being clothed with thick whitish pubescence ; thorax with a stout acute 
spine on each side; elytra even, slightly eneous, closely. punctured, and 
together with thorax variegated with a number of spots of yellowish-, 
grey or greyish pubescence, which are more numerous in the female. L. 
16-26 mm. 
Male with the antenne more than twice as long as body, black ; 
female with the antenne a little longer than the body, ringed with white, 
and with the elytra more thickly spotted with whitish pubescence, 
In timber, and on trunks of trees; very rare, and probably an importation like the 
preceding ; Colney Hatch, and Norwich (Stephens) ; Burton (E. Brown) ; timber- 
yard near Taunton; Manchester; Newcastle (one specimen taken in the street) 
(Dinning). 
