1975] 
Lawrence & Stephan — Cerylonidae 
145 
Mychocerus depressus (LeConte) 
(Fig. 22) 
Murmidius depressus LeConte, 1866: 376. Type locality: Washington, 
D.C. Holotype, No. 6829 M.C.Z. 
This is the smallest cerylonid in our fauna, seldom exceeding 1 mm. 
in length. It is very similar to M. arizonensis , but may be distin- 
guished by the smaller size, more gradually narrowed pronotal apex, 
subparallel mesosternal lines which form a more abrupt angle with 
the lines on the metasternum, and shorter, broader parameres (about 
twice as long as wide at base). The pronotal punctation in M. 
depressus is finer than that of arizonensis, while the elytral punctures 
are larger and more distinct. According to Lewis (1888), the Gua- 
temalan species, M. pilifer, is about the same size, but has a differ- 
ently shaped pronotum and less distinct elytral punctation. 
Distribution. Known from scattered localities in eastern North 
America, from southern Ontario south to Florida and west to eastern 
Texas. 
Biology. Adults have been collected under fungus-infested bark 
of oak, and also under bark of beech and hickory. The larva is 
unknown. 
Botrodus Casey 
Botrodus Casey, 1890: 319. Type species, by monotypy, B. estriatus Casey. 
This New World genus contains only two described species, B. 
estriatus , discussed below, and B. dufaui Grouvelle from Guadeloupe. 
Botrodus estriatus Casey 
Botrodus estriatus Casey, 1890: 320. Type locality: Columbus, Texas. 
Holotype, No. 48836 U.S.N.M. 
This species resembles a small lapethine with respect to its oval 
and highly convex body, confused elytral punctation, and ventral, 
rather than dorsal antennal cavities. Its relationship to Mychocerus 
and Murmidius is indicated by the presence of a frontoclypeal su- 
ture, murmidiine mouthparts (galea and lacinia not elongate, terminal 
segment of maxillary palp not aciculate), and Mychocerus-Ydz.e aedea- 
gus. The species may be distinguished from the other murmidiines 
by the anteriorly rounded mesosternum, 8-segmented antennae, and 
lack of metasternal suture. 
Distribution. Known only from Florida and Texas. 
Biology. Habitat and immature stages unknown. 
