91 



known of their function in the case of a few species, are con- 

 sidered to be the external apertures of scent-glands. But nothing 

 is known as to the nature of the scent in the great majority 

 of the species. In a few, such as the European species Aromict 

 moschata, the scent is like that of attar-of-roses. 



Synopsis of Groups. 



A. Antennae inserted in front of eyes, very close to 



base of mandibles ; eyes rather finely facetted. 



Group Prota.vini. 



B. Antennae more or less distant from base of 



mandibles. 



a. Eyes, except in Tetropium, coarsely facetted. 

 a'. Acetabula of middle coxae open to epimera. 



-. Intercoxal process of prosternum very little 

 or not at all dilated at end ; acetabula of 

 front coxae angulated on outer side, open 

 posteriorly ; gula usually without menti- 

 gerous process. 



a 3 . Wing-venation of Lepturine type; an- 

 tennae shorter as a rule than body in 

 both sexes, not embraced by the eyes at 



base Group Asemini. 



b 3 . Wing-venation reduced ; antennae longer, 

 than body in J , usually embraced by the 

 eyes at base. 



a*. Ligula corneous Group (Emini. 



b 4 , Ligula membranous Group Hesperophanini* 



b-. Intercoxal process of prosternum dilated at 

 end ; acetabula of front coxae closed or almost 

 closed posteriorly, rarely augulated on outer 



side .* Group t'erambycini. 



b'. Acetabula of middle coxae not open to epimera. 

 2 . Antennae spined posteriorly at the apex of 



certaiu joints " Group Phoracanthini. 



6 2 . Antennae not spined. 



a 3 . First abdominal segment of normal 

 length; acetabula of front coxae open 



posteriorly Group Cullidiopsini. 



b 3 . First abdominal segment very long in 

 both sexes, third much shorter than 

 second in $ ; acetabula of front coxae 

 closed behind Group Olriini. 



b. Eyes finely facetted. 



a. Acetabula of middle coxae open to epimera. 

 a 2 . Front coxae angulated on outer side. 



a 3 . Eyes emargiuate, antennae contiguous to 



them. 



4 . Front coxae somewhat conical, rather 

 strongly exserted, their acetabula 



usually closed posteriorly Group Molorchini. 



6 4 . Front coxae not conical nor strongly 

 exserted, their acetabula open pos- 

 teriorly Group Rosaliini. 



b 3 . Eyes entire, antennae somewhat distant 

 from them Group 



