LEPTURID^. RHAGIUM. 253 



Black, pubescent : elytra testaceous-\ixoyvn, immaculate : legs testaceous-brown^ 

 with the femoi'a slightly and rather gradually clavate : antennae rather longer 

 than the body in the males, shorter in the females : in both sexes dusky- 

 brown. 



Occasionally very abundant in tlie hedges in the vicinity of Da- 

 renth-wood in June; I have also twice captured it at Coombe- 

 wood. 



Family XLVIIL— LEPTURIDJi:, Leach. 



Body elongate, mostly attenuated posteriorly, more or less convex. Antennas 

 inserted on the inner margins of the eyes, but somewhat remote therefrom, 

 not as it were arising from the eyes themselves, setaceous, rarely as long, never 

 longer than the body, 11-jointed. Labrum exserted, transverse: maxillce 

 with the external process elongate : labium elongate, coarctate in the middle, 

 the apex deeply notched : head nutant, exserted : eyes slightly emarginate 

 ' within : thorax conic-truncate, or trapeziform, sometimes with a spine on the 

 lateral margins : elytra generally elongate-subtrigonal : legs rather long and 

 slender. 



The Lepturidse, in common with the insects of the preceding 

 family, subsist in their larva state upon decaying trees, and in their 

 perfect form frequent the trunks of trees or flowers, especially the 

 umbelliferse : — their larvse resemble those of the Cerambycidse : — 

 the British species may be thus divided into genera : 



Thorax utrinque spinosus : .... 381. Rhagium. 



unituberculatus : . . . . 382. ToxoTus. 



muticus. 



CoZeqpJra posterius angustiora : . . . 383. Leptura. 



vix angustiora: . . . 384. Pachyta. 



Genus CCCLXXXII. — Rhagium, Fabricius. 



Pa/pi with the terminal joint thickened, short, obconic, truncate: labium with 

 divaricating, slender laciniae. Antenna; shorter than the body, the basal joint 

 stout; second small, subnodose; third longer than the fourth, which is shorter 

 than the third; fifth longer than the third, the remaining joints of nearly 

 equal length, about as long as the fourth : head large, with a tumour behind 

 the eyes, the latter rounded : thorax constricted within the base and apex, 

 the lateral margin with an acute spine : elytra broad, with the shoulders con- 

 siderably elevated: legs moderate -.femora rather stout. 



Exclusively of the acute spine which arms each lateral margin 

 of the thorax, this genus is readily known from the other genera of 



