CERAMBYCIDAE. 309 



-Z. i^ourtli joiut of antennae much shorter than 

 fifth. 



Antennae as long or nearly as long as body ; head gradu- 

 ally narroM^ed behind ; thorax about as long as broad, with 

 obtuse lateral tubercles ; elytra elongate, somewhat flat, 

 gradually narrowed behind, apex more or less truncate, 

 sometimes spined. Toxotus, Serv. 



2, Fourth joint of antennae nearly as long as fifth. 



A A, Head gradually narrowed behind. 



Antennae as long or nearly as long as body; thorax 

 narrowed in front, sometimes with lateral tubercles. 



Pachyta, Serv. 

 H S. Head abruptly narrowed behind. 

 ci a. Elytra narrowed from base to apex. 



A a. Posterior angles of thorax produced 

 spinelike. 



Antennae as long or nearly as long as body ; thorax 

 usually longer than broad, narrowed in front, sides rounded, 

 without lateral tubercles. Strangalia, Serv. 



J5 h. Posterior angles of thorax obtuse. 



Antennae scarcely as long as body ; thorax as long as 

 broad, narrowed in front, sides rounded, without lateral 

 tubercles. Leptura, Lin. 



b b. Elytra not, or only slightly narrowed 

 behind. 



A a. Posterior angles of thorax obtuse. 



Antennae as long or nearly as long as body; thorax 

 rounded at sides, without lateral tubercles. 



Anoplodera, Muls. 

 J> b. Posterior angles of thorax spined. 



Antennae scarcely as long as, or shorter than body ; 

 thorax rounded at sides, without lateral tubercles. 



Grammoptera, Serv. 



JB. Head not constricted into a neck behind ; anterior 

 coxae not or only slightly prominent. 



a. Thorax without any, or with only very feeble lateral 

 tubercles. 



