154 
Psyche 
[June 
behind, the antennae are io-segmented with an elongate, i -segmented 
club, and the labrum is elongate and narrowed, or sometimes acute, 
at the apex. 
Cerylcautomus floridensis Sen Gupta and Crowson 
Cerylcautomus floridensis Sen Gupta and Crowson, 1973: 441, figs. 205- 
213. Type locality: Chaires, Leon Co., Florida. Holotype, Field 
Museum. 
This species is easily distinguished from other North American 
cerylonines by the small size (less than 1.25 mm.) and elongate 
form, io-segmented antennae with a 1 -segmented club, prosternal 
antennal cavities, and acute labrum. 
Distribution. Known only from northern Florida. 
Biology. Recorded from an old sawdust pile (more than 20 years 
old) at the edge of a cypress swamp. Other members of the genus 
have been extracted with Berlese funnels from forest litter and rotten 
logs. 
Lapethus Casey 
Lapethus Casey, 1890: 317. Type species, by monotypy, L. discretus Casey. 
Lyptopefllus Sharp, 1895: 494. Type species, by monotypy, L. compactus 
Sharp. 
Brachylon Gorham, 1898: 256. Type species, by monotypy, B. breve 
Gorham. 
Lapecautomus Sen Gupta and Crowson, 1973: 409. Type species, by ori- 
ginal designation, L. dybasi Sen Gupta and Crowson. New Synonymy. 
Sharp originally placed L. compactus in a separate genus because 
of the widely separated pro- and mesocoxae and the coadaptation of 
the pro- and mesosternum. Hinton (1936) pointed out that the 
differences were only a matter of degree and that certain Lapethus , 
such as L. sharpi Champion, displayed an intermediate condition; on 
this basis he synonymized Lytopeplus with Lapethus. Sen Gupta and 
Crowson, however, recently resurrected Lytopeplus , stating that the 
only difference between species of the genus and those of Lapethus is 
the slight closure of the procoxal cavities in the former. After exam- 
ining a number of lapethines from Mexico and Central America, we 
are of the opinion that the features diagnosing Lytopeplus represent 
a general trend towards compaction throughout the group, and that 
these compact forms are not necessarily members of a single phyletic 
line. Likewise, the condition represented in the three described 
