294 NATURAL ARRANGEMENT OF INSECTS. 



logy may yet hold good ; even if the groups themselves 

 turn out, upon further examination, to be of different 

 or subordinate ranks. 



(263.) The Stenochorince present us with some, 

 very interesting genera. In addition to the spines of 

 the elytra, the apex of the joints of the antennae are 

 frequently prolonged into acute spines, as are also in 

 some the extremity of the femora. Uracanthus is dis- 

 tinguished for its narrow very linear form, and Scole- 

 cobrotus for the series of small spines occupying the 

 whole length of each joint of the antennae externally; 

 and Eburia and Elaphidion are gay insects with ivory- 

 coloured spots ; but Chlorida is distinguished for its 

 pale green elytra. 



(264.) The CallichromincB are very elegant insects, 

 usually of brilliant greens and blues, and are frequently 

 of very conspicuous size, especially in the genus 

 Callichroma itself, in which the posterior tibiae are 

 always compressed into a dilated plate. The type 

 of the sub-family is a British insect, namely, the 

 Aromia moschata, which, like its congeners, as also the 

 species of Callichroma, exhale a rich fragrance much 

 resembling the odour of the otto of roses. This is pro- 

 duced by a white milky secretion more liquid than what 

 we have observed in speaking of the exuding secretion 

 of Meloe. Possibly here, the fluid is a sexual lure 

 instead of a means of defence., as it is always found to 

 be strongest prior to their intercourse. lonthodes and 

 Rosalia are also elegant insects, and the latter is ex- 

 tremely abundant in various parts of Switzerland : the 

 majority of these occur in humid situations, and chiefly 

 inhabit soft wood like the willow. 



(26,5.) The LEPTURINJE are distinguished from all 

 the rest of the Longicornes by their very distinct neck, 

 which in some, as in Nemotrogus, a large linear 

 Cape insect, is extremely long, as are also the an- 

 tennae, the latter being very slender. The thorax 

 attenuated in front, amply characterises this sub- 

 family, and, together with their porrect mouth, gives 



