64 INSECTA. 



mated by its name, for the maxillaiy palpi, which are frequently ser- 

 rated, very large and inclined. The antennae 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 



DiRCiEA, Fab. 



Some few have their antennae terminated by a club. Such are 

 those which constitute the 



Orchesia, Lat. — Dirc^a, 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 antennae of the others are filiform. 



Here the legs are fitted for leaping, the body is oval or ovoid, the 

 antennae 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. 



EusTROPHUs, Illig. — Mycetophagus, Fab. 



The body is ovoid and the thorax broad, emarginated before, and 

 with prolonged posterior angles ; the antennae are shorter than the 

 thorax, and the four posterior tibiae elongated and terminated by two 

 long spu t 



Hallomenus, Payk. — Dirc.^a, Fab. 



The body more elongated, oval ; antennae longer than the thorax, 

 and the posterior tibiae long and slender, with two very short terminal 

 spurs \. 



* Lat., Gener. Crust, et Insect, II, p. 194; SchcKnh., Synon. Insect., I, iii, 

 p. 51. 



t Mycetophagus dermestoides, Fab. Another species has been brought from Brazil 

 by M. de la Cordaire. 



X See Gyllenh., Insect. Suec, I, ii, p. 526. 



