Malthodes. | SERRICORNIA. 153 
thorax double as broad as long, shining black, with the anterior angles, 
and to a lesser degree the posterior angles, elevated and somewhat pro- 
minent, with three impressed fovez, one on dise and two near anterior 
angles ; elytra broader than thorax, about two and a half times as long 
as together broad, rather plainly and rugosely punctured; under-side 
black; legs lighter or darker pitchy brown, with the tibie and tarsi a 
little lighter, and the knees light brownish-yellow. L. 2-2} mm. 
Male with the head narrower than in female; dorsal segments of 
abdomen elongate, reaching beyond the ventral segments, the last nar- 
rowed; penultimate ventral segment deeply but narrowly incised, last 
segment forming a short and straight, slender and shining style, which 
is suddenly dilated and split into a fork at apex. 
By beating and sweeping; apparently very rare ; it was first introduced somewhat 
doubtfully by Mr. Crotch on two female specimens, and specimens taken by Dr. 
Power at Mickleham and Purley oaks have been referred to it, but one of those now 
before me does not appear to differ from WM. atomus; Mr. Blatch records it from 
Church Stretton, Cheshire. 
iM. atomus, Thoms. (brevicollis, Payk. et Kies., nee Thoms.). 
This species may at once be known by its very small size, and by its 
colour, which is greyish-black with the posterior margin of thorax and 
the apex of the elytra of a dirty yellowish-testaceous colour ; the head 
with eyes is a little broader than thorax; antenne rather stout, not 
reaching apex of elytra, brownish or blackish; thorax more than double 
as broad as long, uneven, with all the angles somewhat prominent ; 
elytra about two and a half times as long as together broad, scarcely 
covering half the abdomen, finely punctured, alutaceous, somewhat 
transparent ; under-side greyish-yellow or greyish-brown; legs fuscous 
or fuscous-yellow. L. 1-13} mm. 
Male with the last dorsal segments of abdomen elongate, the last 
deeply cleft, with the lobes filiform; penultimate ventral segment 
roundly emarginate, produced on each side into an elongate lobe, which 
is sharp at apex, the last forming a thin strongly curved style, which is 
forked at apex. 
Female with the head rather narrower than in male, and the antenne 
almost moniliform, and the last ventral segment of abdomen incised in 
the middle. 
By beating and sweeping in and near woods; local, but not uncommon where it 
occurs; London district, rather common and generally distributed; Mr. T. Wood 
records it as taken at Dulwich by night sweeping only; Glanvilles Wootton ; New 
Forest ; Devon; Chat Moss (on sallows) ; Northumberland and Durham district, 
rare; Scotland, local, Solway, Tweed, Dee, and probably the intervening districts ; 
Ireland, Portmarnock and near Belfast. I know of no record from the Midland 
counties of England, or from Wales; the insect is, however, in all probability, often 
passed over. 
This species, as Thomson observes, is distinguished from all the others 
by its small size and the almost moniliform antenne of the female, and 
