474 INSECTA. 



the last of the maxillary palpi strongly dilated and securiform. The 

 body is generally more oblong. They form the 



Allecula, Fab.(l) 



The third tribe, that of the SERROPALPiDEs(2),is remark- 

 able, as intimated by its name, for the maxillary palpi, which 

 are frequently serrated, very large, and inclined. The an- 

 tennae 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 cylin- 

 drical in some, and oval in others; the head is inclined, 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 



Dirc^a, Fab. 



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

 which constitute the 



Orchesia, Lat. Dircasa, 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(3). 



The antennae of the others are filiform. 



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



(1) The Alleculas contractu, geniculata of Germar, Insect. Spec. Nov., p. 

 165!, 164 have their anterior tarsi strongly dilated. 



(2) The Securipalpes of my Fam. Nat. du Reg-ne Animal. The term Serropal- 

 pides is preferable, inasmuch as it reminds us of the genus Serropalpus which 

 forms part of this tribe. 



(3) Lat., Gener. Crust, et Insect, II, p. 194; Schcenh., Synon. Insect., I, iii, 

 p. 51. 



