452 Goleopterological Notices^ VI. 



regard to Mycliocerus, the legs in that genus being perfectly free 

 and not retractile. 



The principal distinctive features of the Murniidiinfo are the 

 very small oval body, the widely separated coxaj. the somewhat 

 elongate basal segment of the abdomen, the ten-jointed antennae 

 and the small deei) coxal cavities, closed behind by the ineso- 

 sternum, although I have not examined the Colydiint\? very thor- 

 oughly for the purpose of determining the weight of the latter 

 character as a distinguishing feature. 



The four tribes may be briefly characterized as follows: — 



Antennal cavities present: last joint of the maxillary palpi slender and aeicu- 

 late. 



The cavities large, shallow and completely on the under surface; labrum 

 triangular, with the apex acutely incised; legs partially retractile; pro- 

 sternal lobe short Lapethiki 



The cavities at the apical angles of the prothorax, visible in front but not 

 from above; labrum short and transverse; legs free; prosternal lobe not 

 concealing the trophi in repose M YCHOCERixi 



The cavities at the apical angles and Avholly visible from above; lal)rum 

 probably very short and transverse; legs strongly retractile; prosternal 

 lobe large, completely concealing the labrum and mouth parts in repose. 



MURMIDIIXI 

 Antennal cavities wanting ; last joint of the maxillary palpi elongate and as wide 



as the preceding; labrum truncate; prosternal lobe short; legs free; anterior 



coxae much less widely separated EupsiLOBllNl 



In Cerj'lon the anterior coxal cavities are completely' closed be- 

 hind by the broad fusion of the propleura? and intercoxal pro- 

 cess, but in Pliilothermus the cavities are open behind. Philo- 

 thermus will therefore form a distinct tribe uniting the Mur- 

 midiinai with the Colydiini\i through the Cerylonini, and might 

 be provisionall}' attached to the former; in general facies it is 

 strikingly intermediate between Cerylon and Lapethus. The 

 mentum in Pliilothermus is slightly elongate-oval, with a strong 

 elevation in the form of an acute triangle, and the 11-jointed anten- 

 nne have a strong 2-jointed club, the joints being perfectly free. 



Lapethini. 



This tribe consists at present of the single genus Lapethus 

 (Col. Not., II., p. 317), having the prosternal process rather long, 

 broadly rounded at ai)ex and received, on nearly a common level, 

 in a broad emargination of the mesosternum ; prosternum verv 



