Silis. | SERRIOORNIA. 133 
catalogue, but the number both of species and allied genera has been 
largely increased by Mr. Gorham, who has worked out the specimens 
collected by Mr. G. C. Champion in Central America ; the species are 
known by the peculiar excision of the sides of the thorax before base in 
the males ; the antenne in Silis are feebly serrate, but in some of the 
allied genera, such as Thinalmus, they are strongly flabellate and 
almost plumose ; there are three European species belonging to the 
genus, of which one occurs rarely in Britain. 
S. ruficollis, F. (rubricollis,Charp.). Black, with the mandibles, base 
of first joint of antenne, thorax and abdomen red; head finely and rugosely 
punctured, eyes moderately large, antenne long and rather stout, feebly 
serrate ; thorax transverse, uneven, with ccarse irregular punctures on 
middle of disc, with sides incised and dentate before base in the male, 
simple in the female ; scutellum rather large, rounded behind ; elytra 
about four times as long as thorax, clothed with greyish pubescence, 
thickly and rugosely punctured, with traces of raised lines ; legs black 
or fuscous, with more or less of tibize usually yellowish. L. 5-6 mm. 
By sweeping, &c.; rare, and usually confined to fenny and marshy localities ; 
Epping Forest; Dagenham, Essex; Potter Heigham and Wroxham, Norfolk ; 
Horning Fen ; Hoveton ; Burwell Fen; Whittlesea Mere; Brandon (Suffolk). 
PODABRWS, Westwood. 
This genus contains about fifty species, which are confined to Europe, 
Northern Asia, and North America; they are distinguished from 
Telephorus by having the head very strongly contracted behind eyes, 
the tibial spurs obsolete, and the tarsal claws bifid; there are six 
European species, of which one is found in Britain; it is locally abundant 
on or about oak, fir, and other trees in early summer. 
P. alpinus, Payk. (Jaferalis, L.). A large and elongate species, 
which may easily be known by the long head which is strongly con- 
tracted behind the eyes, which are very prominent; colour variable, 
being lighter or darker testaceous, with the vertex of head and the 
under-side of the body black, or with the elytra entirely black ; the ven- 
tral part of the thorax is often more or less dark ; head coarsely and 
rugosely punctured, antennz long, with second joint ‘longer than third ; 
thorax transverse, subrectangular, with the posterior angles more or less 
distinctly toothed ; elytra broader than thorax, elongate, finely and 
rugosely punctured, with traces of raised lines; legs testaceous, more or 
less black in different varieties. LL. 10-12 mm. 
By beating fir trees, also young oak, hazel, birch, &c.; in woods; locally common ; 
London district; Hastings; New Forest ; Dorset ; "Devon ; Dean Forest; Bir- 
mingham aisbrieti: Cannock Chase; Repton, Bretby Wood (in abundance on fir 
trees) ; Sherwood Forest ; Staffordshire ; Llangollen ; Northumberland and Durham 
district ; Scotland, local, Solway, Tweed, Clyde, Argyle, Tay, Dee, and Moray 
districts ; Ireland, near Dublin. 
