BY A. SIDNEY OLLIFF, F.E.S. 409 



1. Labial palpi 2-jointed. 



a. First joint of the posterior tarsi at least equal to 



the 2nd and 3rd united Placusa. 



b. First joint of the posterior tarsi about equal to the 

 second Silusa. 



2. Labial palpi 3-jointed Bolitochara. 



C. All the tarsi 5- jointed. 



1. Head jutting out, free from the prothorax, and con- 



tracted at the base. 



a. First joint of the posterior tarsi shorter than the 



two following together Phloeopora. 



b. First joint of the posterior tarsi at least equal to the 



two following together Calodera. 



2. Head sunk in the prothorax or slightly contracted at 



the base. 

 a. Labial palpi 4-jointed, maxillary 5-jointed. 

 aa. Posterior tarsi with the 1st joint one-half longer 



than the 2nd .., Aleochara. 



bb. Posterior tarsi with the 1st joint about equal to the 



2nd Correct. 



b Labial palpi 3-jointed, maxillary 4-jointed. 

 aa. External lobe of the maxillae provided above with 



lobif orm appendices Polylobus. 



bb. External lobe of the maxillae without lobiform 



appendices , Oxypoda. 



II. Antennae 10-jointed ; tarsi 4-jointed Oligota. 



1. Falagria. 



Mannerheim, Brachel. p. 86 (1830); Lacordaire, Gen. Col. II., 

 p. 28. — Myrmecocephalus, Macleay, Trans. Ent. Soc. N.S.W. 

 II., p. 134 (1871). 



Mentum transverse, slightly emarginate in front. Ligula short, 

 bifid in front. Paraglossse prominent. Maxillary palpi with the 

 second and third joints sub-equal. Labial palpi 3-jointed, 2nd 

 joint slightly shorter than 1st., last joint thickened at apex. 

 Maxillae similar to those of Homalota. Mandibles unarmed. 

 Head nearly orbicular, constricted behind into a narrow neck. 

 Antenme rather long, somewhat thickened towards the extremity, 

 the 2nd and 3rd joints nearly equal, longer than the following 



