1878. } 561 {Horn. 
Tribe IL. SYNCHITINI. 
Antenne capitate, retractile, inserted under the frontal margin a short 
distance in front of the eyes. Head horizontal, eyes usually round, mode- 
rately prominent, entire, rarely (Phl@onemus) emarginate by the sides of 
the front. Anterior coxze small, rounded, narrowly separated, usually a 
little more prominent than the sternum between them. -Middle coxze mod- 
erately distant. Posterior cox transverse, attaining the margin of the 
body, separated by a triangular abdominal process. Metasternal side pieces 
narrow, rarely (Hudesma) concealed by the elytra. Abdominal segments 
decreasing gradually in length, and in Cicones distinctly mobile. Tarsi 
short, first three joints subequal, together not longer than the fourth. 
The genera of this tribe in our fauna are represented by 
species the sculpture of which is more or less coarse, either 
costate or granulate, opaque and pubescent. 
Here also we have differences in the structure of the an- 
terior coxal cavities, all excepting two have these open be- 
hind. The other characters in which differences occur are 
those of generic value merely. The tribe as here defined is 
homogeneous and scarcely merits further division. 
The genera are: 
Anterior coxal cavities open behind. 
Antenne 10-jointed, club solid. 
Head without antennal’ srooves : 1. 022.6 cslew ns oe ee. eee Synchita. 
Eleadiswiiiie IiSliNnGHOTOOMES!: ./.<,s.</c-hycleise la eis ties atone Lee oe Cicones. 
Antenne 11-jointed, club 2-jointed. 
Eyes free rounded. 
Headwithout antennal grooves... i. 2.2008 es.jte- snes es ae Ditoma. 
Head with distinct antennal grooves. 
Tibi with distinct terminal spurs. ...< .. 00. fac. 0s. eee Eudesma. ' 
Wibize WitDOUL TERDMMAl SPUPS..< 050.005 sce yeeeie aa cc Endophlceus. 
Eyes emarginate by the sides of the front. 
Antennal SFOOVES CISUINGHs one. tan. Uns. o fe orieiele se oe Phiceonemus. 
Anterior coxal cavities closed behind, 
Antenne with a 2-jointed club. No tibial spurs.............. Coxelus. 
Antenne with a 3-jointed club. Small tibial spurs......... Lasconotus. 
SYNCHITA Hellw. 
Antenne 10-jointed, terminated by an abruptly larger joint which is 
glabrous at base, pubescent at tip. Head beneath without antennal grooves. 
Tarsi stout, first three joints very short, but little longer than half the 
fourth, clothed beneath with short pubescence. Tibiee slender with minute 
terminal spurs. 
PROC. AMER. PHILOS. soc. XVII. 101. 3R. PRINTED JUNE 1, 1878. 
