Crotch.] "4 [Feb. 7, 



all show great affinity to RMzophagus, from which the anterior coxae at 

 once separate it. Thomson has placed them in Latridiida, which the 5- 

 jointed tarsi prevent ; Duval with the Cucujidce on account of the short 

 1st joint of the tarsi. The raised line on the 1st ventral segment and the 

 structure of the head show a close affinity to Silvanus. 



Bitomid.e. 



Anterior coxae rounded, cavities closed. 



Ventral segments 5, 1st elongate. 



Tarsi 5-jointed, 1st joint extremely minute. 



This family was formed by Duval, who included Endecatomus, which 

 is however a true Bostrychide as shown by Leconte ; Thomson has left 

 Lyctus also in Bostrychidce, but it agrees in all essentials with Colydiidae 

 and Cucujidie, having a close affinity to the latter by the short 1st joint 

 of the tarsi. The name Lyctus was first used for this genus by Latreille 

 in 1807, but Herbst had previously indicated it and in the name Bitoma 

 in 1794. Wollaston dissected this genus carefully in 1854, and considered 

 it a Colydiid, regarding the basal articulation as merely a swelling ; it 

 appears to me certainly very close to Colydiidm by the structure of the 

 presternum, the club, and the obsolete elytra epipleurae, but the basal 

 joint is visible is some species. 



Colydiid^;. 



Anterior coxae small, globular, cavities generally closed. 



Posterior coxae sometimes contiguous, transverse. 



Ventral segments 5, 1-3 or 1-4 connate ; 1st often elongate. 



Tarsi 4-jointed, simple. 



Antenna; often capitate, form cylindrical, or depressed and with grad- 

 ually clavate antennae. Eyes coarsely granulated. The prosternal struc- 

 ture in Bothrideres resemble that of Brenthus and also of Rhyssodes. 

 Myrmecoxenus must be placed here according to Thomson, having the 4- 

 jointed tarsi and connate segments, but he also adds Silvanus, in which I 

 cannot concur. He breaks the family up into three, Bothrideridce, Coly- 

 diidce, Synchitidce. Murmidius if not a separate family can only go here ; 

 the globose anterior coxae and 4th-jointed tarsi would seem to agree very 

 well. After examining Discoloma and other genera, it is evident that 

 Cossyphus can only go here (or in a separate family next to it, character- 

 ized by the heteromerous.tarsi). 



PiHIZOPHAGID/E. 



Anterior coxae ovate or rounded, cavities generally transverse, always 

 closed. 



Posterior coxa? transverse. 



Ventral segments 5, 1st elongate, often with coxal lines. 



Tarsi 5-jointed, often dilated. 



Antennae 10-iointed, 11th joint connate with the preceding. 



This family is' dentical with Monotomidie, etc., except that I have added 



