Horn. ] 588 [April 19, 
Tribe VII. CERYILONINI. 
Antenne capitate, retractile, free at base, insertion frontal. Head re- 
tracted, slightly deflexed, eyes round, moderately coarsely granulated. 
Anterior cox round, rather narrowly separated. Middle coxse more 
widely separated. Posterior coxte oval, widely separated. Metasternal 
side pieces extremely narrow. First ventral segment as long as the three 
following together, 2-4 short, equal, fifth slightly longer. Palpi with the 
terminal joint acicular, the penultimate ovoid. First three joints of tarsi 
short, together shorter than the fourth. 
For the present, two genera may be considered as consitu- 
ting this tribe in our fauna, although it might with pro- 
priety be divided into two. 
Anterior cox closed behind. 
Anterior 10-jointed, club with one joint........ re cree Sh ees Cerylon. 
Anterior coxze open behind. 
Antenne Ne\ ombted, elulbr2-jomted tae je cmece eaters ar Philothermus. 
In the latter genus I have observed a distinct onychium 
with two terminal setze, this character has entirely escaped 
me in the other genera if it exists. 
From this tribe I have removed Murmidius and Mycho- 
cerus placed here by Crotch and Erichson, to follow the ex- 
ample of Duval in forming for them a distinct family. 
CERYLON Latr. 
Antenne ten-jointed, terminated in a club of one joint, evidently the 
union of two, insertion almost frontal, without antennal grooves. Head 
small, deeply inserted, narrowed in front of the insertion of the antenne. 
Eyes narrow, transverse. Palpi with last joint small, acicular, penultimate, 
large, ovoid. Anterior'coxe widely distant, the prosternum broad and di- 
lated behind them. Middle cox more distant than the anterior. Posterior 
cox small, oval, very widely distant. Tibi slightly broader toward the 
tip; with small terminal spurs. Trochanters evident. Abdomen with first 
segment nearly as long as the others together, the next four segments equal. 
Scutellum small, transverse. 
I have examined our species with a great deal of care on 
a large series of specimens, and am entirely unable to find 
more than one true species. 
C. castaneum Say, Jour. Acad. V, p. 259; Am. Ent. edit. Lee. II, 
p. 321; wntcolor Zieg. Proc. Acad. II, p. 70; simplex Lec. Pac. R. R. Rep. 
47 par. Vol. TX, App. 1, p. 39; angustulum Lec. New Species, 1863, p. 69. 
Oblong-elongate, castaneous or piceous, shining, depressed. Head 
