150 
Psyche 
[June 
several phyletic lines. A more detailed analysis of the group and the 
related Cerylonini, based on characters unrelated to the feeding 
apparatus, may shed more light on the problem. 
The Cerylonini. include the remaining dozen or so cerylonine 
genera which have not been placed in the above tribes, and these also 
form a diverse 'assemblage. The large genera Cerylon and Philo- 
thermus are discussed below, while the smaller exotic groups are 
covered in Sen Gupta and Crowson (1973), Hinton (1942a), and 
Heinze (1944). 
P hilothermus Aube 
Philothermus Aube, 1843: 93. Type species, by original designation, P. 
montandoni Aube. 
There has been considerable confusion concerning the constitution 
of this genus, and both Heinze (1944) and Sen Gupta and Crowson 
(197 3) have attempted to clarify its limits and to distinguish the 
included species from those of Cerylon. The latter authors have 
defined the group primarily on the basis of prosternal characters and 
have included a number of forms with 10-segmented antennae and 
a 1 -segmented club. Among these are members of the genus Ecto- 
micrus Sharp (1885) and a group of African Cerylon-like forms. 
Although Ectomicrus was synonymized with Philothertnus by Reitter 
(1890), Heinze (1944) found several characters to distinguish it, 
in addition to the 1 -segmented antennal club. The African forms 
mentioned (at least P. carnerunense Sen Gupta and Crowson) have 
well-developed femoral lines on the abdomen and appear to have 
more in common with Philothertnopsis than Philothermus, in spite 
of tarsal differences. As presently conceived, Philothermus includes 
about 50 species, which are characterized by having a more or less 
elongate form, 4-segmented tarsi, no prothoracic antennal cavities, 
procoxal cavities open or narrowly closed behind, and the prosternal 
process not or only slightly widened and more or less rounded at 
apex. In addition, most of the species have 11 -segmented antennae 
with a 2-segmented club and no femoral lines on the first ventrite. 
In North America, the genus is represented by a California and a 
Florida endemic and a widespread eastern species. 
Key to the North American Philothermus 
1. Body more elongate, PL/PW more than 0.82 and EL/EW 
more than 1.58; each elytron with 7 rows of punctures (not 
