64 INSECTA. 
mated by its name, for the maxillary palpi, which are frequently ser- 
rated, very large and inclined. The antennz are inserted in an 
emargination of the eyes, exposed, as in the preceding tribe, and 
most usually short and filiform. ‘The mandibles are emarginated or 
bifid at the extremity, and the hooks of the tarsi are simple. The 
body is almost cylindrical in some, and oval in others; the head is in- 
clined, and the thorax trapezoidal. The anterior extremity of the 
head does not project, and the posterior thighs not inflated, charac- 
ters which distinguish these Insects from various Heteromera of the 
ensuing tribe. The penultimate joint of the tarsi, or at least of the 
four anterior ones, is most commonly bilobate, and in those where it 
is entire the posterior legs at least are fitted for leaping; in this case 
they are long and compressed, the tarsi small, almost setaceous, and 
their first joint elongated; the anterior ones are frequently short and 
dilated. 
The type of this tribe is the genus 
Dircaa, Fab. 
Some few have their antenne terminated by a club. Such are 
those which constitute the 
OrcuesisA, Lat.—Dircma, Fab., 
Where the maxillary palpi are terminated by a securiform joint. 
The legs are fitted for leaping, and the penultimate joint of the four 
anterior tarsi is bifid *. 
The antenne of the others are filiform. 
Here the legs are fitted for leaping, the body is oval or ovoid, the 
antenne are always short and almost cylindrical, the maxillary palpi 
merely somewhat larger at the extremity, but not terminated by a 
securiform joint, and all those of the tarsi entire. 
Eustropuvs, [dig —Mycrroruacus, Fab. 
The body is ovoid and the thorax broad, emarginated before, and 
with prolonged posterior angles; the antennz are shorter than the 
thorax, and the four posterior tibize elongated and terminated by two 
long spu + 
Hatiomenvus, Payk.—Dircma, Fab. 
The body more elongated, oval; antennee longer than the thorax, 
and the posterior tibize long and slender, with two very short terminal 
spurs f. 
* Lat., Gener. Crust. et Insect., IT, p. 194; Schoenh., Synon. Insect., I, iii, 
p- 51. 
+ Mycetophagus dermestoides, Fab. Another species has been brought from Brazil 
by M. de la Cordaire. 
~ See Gyllenh., Insect. Suec., I, ii, p. 526. 
