SYNCHITIDES. 451 



Penultimate joint of palpi thickened ; first ventral al)- 

 doniinal segment mucli longer than rest ; all coxae placed 

 apart. Cerylides. 



SYJ^CHITIDBS, 



A. Tibiae without apical spines. 



<(, Antennae stretched forward, not capable of being laid 

 back under head, fourth to ninth joints equal in breadth, 

 tenth narrower, eleventh hidden in tenth. 



Maxillae hidden ; first three tarsal joints short, with stiff 

 bristles beneath. Sarrotrium, lU. 



b. Antennae capable of being laid back under head ; 

 club two-jointed. 



Grooves for reception of antennae short and shallow. 

 Upper-side rough ; sides of tliorax and elytra notched. 



Endoijhloeus, Er. 

 7?. Tibiae with small, fine apical spines. 



a. Antennae with eleven joints, club two-jointed. 



Mandibles with two-toothed apex ; ligula slightly emargi- 

 nate at apex ; no grooves for reception of antennae. 



Ditoiiia, 111. 



h. Antennae with ten joints, apical one forming a large 

 solid knob. 



I, No grooves for iBception of antennae. 



Apex of mandibles simple ; ligula slightly emarginate at 

 apex. Synchita, Hellw. 



II, Grooves for reception of antennae distinct. 



Apex of mandibles simple ; ligula rounded in front. 



Ci cones, Curt. 



Savrotriinn, 



Gray-black, with very fine whitish pubescence. An- 

 tennae spindle-shaped, hairy ; thorax a little narrowed in 

 front, with a longitudinal elevation on each side of central 

 furrow ; elytra witli rows of deep punctures, alternate 

 interstices raised. L. 2 1. leather common. 



S. clavicorne, Lin. 

 Endophloeus, 



Oblong, rather flat. Dull red-brown, suffused with pitch- 



G G 2 



