(Page 628) 



with brownish elytra; antennae, witn exception of the brownish club, and 



legs purely reddish-yellow. 



Antennal club strongly thickened; pronotum and elytra less convex 



than in macropterus . Tibiae in the » straight. L. 1 mm. 



Particularly rare; in this country heretofore found only singly at 



Renne (9. 1870 V. Schlick) and at Hillerod (9. 1903 Author) in fungi. 



122. Genus Megarthrus Steph. 



(Steph. 111. Brit. V, 330; Erichs. Ka'f. Mk. Br. I, 642; Hen. Spec. Staph. 

 904; Kraatz Ins. D. II, 1026; Thorns. Skand. Col. Ill, 218; Muls. et Pey Bre'- 

 vip. 1878, 232; Ganglb. Kaf. U. II, 760). 



The body (Fig. 190) is rather broad and flat; the head proportionately 

 small, nearly triangular, immediate behind the prominent, large eyes con- 

 stricted, forehead at middle slightly convex, and with a flat, broad lon- 

 gitudinal impression on each side inside the eyes,, vertex without ocelli; 

 antennae from the third joint thin, the first two joints thickened, the 

 middle ones, especially the third and fourth, fine, the next-last (6-10) 

 of equal thickness, somewhat rounded or a little oblong, the distal joint 

 larger than the preceding, oval; fourth joint of maxillary palpi nearly as 

 long as the two preceding joints together, and a little thinner than these, 

 feebly tapering. 



Pronotum about as broad as elytra, broader than long, anteriorly slight- 

 ly narrowing, with more or less broadly set off side-margin, sharply and en- 

 tirely middle-grooved, and with an angular incision in each hind corner; el- 

 ytra nearly twice as long as pronotum, with a longitudinal impression along 

 side-margin, and rounded off outer hind. corners, posteriorly evenly truneeted; 



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