452 Goleopter ological Notices^ VI. 



regard to M^chocerus, the legs in that genus being perfectly free 

 and not retractile. 



The principal distinctive features of the Murmidiinae are the 

 very small oval body, the widel}' separated coxfe, the somewhat 

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

 and the small deep coxal cavities, closed behind by the meso- 

 sternum, although I have not examined the Colydiinee very thor- 

 oughl}' for the purpose of determining the weight of the latter 

 character as a distino^uisliinof feature. 



The four tribes may be briefl}^ characterized as follows : — 



Antennal cavities present; last joint of the maxillary palpi slender and acicu- 

 late. 



The caA'ities large, shallow and completely on the imder surface; labruni 

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

 sternal lobe short Lapethini 



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 MYCHOCEEIXI 



The cavities at the apical angles and whollj^ visible from above; labrum 

 probably very short and transverse; legs strongly retractile; prosternal 

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



MUEMIDIIXI 



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

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

 cox?e much less widely separated EUPSILOBIIXI 



In Cerylon the anterior coxal cavities are completely closed be- 

 hind by the broad fusion of the propleurae and intercoxal pro- 

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

 thermus will therefore form a distinct tribe uniting the Mur- 

 inidiinie with the Colydiinte through the Cer3'lonini, and might 

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

 strikingly' intermediate between Cer3don and Lapethus. The 

 mentum in Philothermus is slightlj^ elongate-oval, with a strong 

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

 nx 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 apex and received, on nearly a common level, 

 in a broad emargination of the raesosternum ; prosternum very 



I 



