THE LONG1CORNES. 209 



ochreous tint ; and populnea, a hairy, minutely speckled 

 insect, common near London on young aspens, is readily 

 found in its larval state by the round swollen knobs 

 which it makes in the stems of that tree. 



Another genus, Tetrops, of which the single species 

 is also common near London, and easily known by its 

 linear shape, very small size, black head and thorax, and 

 brownish elytra, is worthy of notice on account of each 

 of its eyes being absolutely divided into two by the in- 

 sertion of its antennae. 



The LEPTUKID^E, as compared with their allies, are 

 more active and diurnal in their habits, smaller in size, 

 and with shorter antennas. 



Their eyes are- almost rounded, or only slightly emar- 

 ginate; their head bent downwards, but not abruptly 

 so, and with a distinct neck; their labrum is mostly 

 conspicuous ; their thorax narrowed in front, and their 

 elytra more or less contracted behind. 



They form two sub-families, the Molorchides and 

 Lepturides ; in the former of which the elytra are ab- 

 breviated, with the wings exserted ; the femora clavate 

 the front coxse approximated and the thorax cylindrical, 

 with a small lateral tubercle. 



We , possess one genus, Molorchus, containing two 

 species; one of which, M. umbellatarum (Plate XIII, 

 Fig. 6), sometimes found in flowers, but much more 

 readily obtained by beating bundles of dead twigs in 

 hedges, is not uncommon near London. Its small size, 

 narrow appearance, long thin legs and antennae, short 

 wing-cases and exposed wings, easily distinguish it 

 from any other insect. 



The Lepturides have the front coxae much projecting, 

 1 and usually wide apart ; the antennae rarely longer than 



If 



