BULLETIN FLORIDA STATE MUSEUM


 VERTICAL STRATIFICATION.--C. castanea and C. perspicillata were
 both captured more frequently at ground level than at upper levels of
 the forest (C. castanea = 20 ground level, 14 upper levels; C.
 perspicillata = 50 ground level, 34 upper levels), but the difference was
 not statistically significant. Both species feed on plants of ground and
 canopy levels. Known groundstory fruits make up 78.4% of the diet of
 C. castanea and 38.0% of the diet of C. perspicillata. During seasons
 when these bats feed mostly on canopy fruits, they are captured more
 frequently in high nets and traps.
 FEEDING BEHAVIOR.-Carollia castanea and C. perspicillata both
 have been captured carrying fruits and presumably use night roosts as
 do canopy frugivores. Some fruits are carried back to the day roost for
 consumption (Table 10).
 Both species of Carollia show major peaks of flight activity in the
 first hour of darkness (Fig. 8). This is earlier than the start of most
 canopy frugivores' activity and is probably due to the groundstory
 becoming dark about an hour before the canopy level of the forest. Pat-
 terns of flight activity in groundstory frugivores are bimodal or
 trimodal as are those of canopy frugivores.
 SCAVENGING (OR JUICER) FRUGIVORE GUILD
 BODY SIZE.-Centurio senex (Stenoderminae, Phyllostomatidae),
 the wrinkle-faced bat, is the sole member of the scavenging frugivore
 guild. A lactating female weighed 22 g, and a pregnant female weighed
 27 g. No other weights are available from BCI for this species, nor are
 there data on vertical stratification or habitat use.
 FEEDING BEHAVIOR.-Goodwin and Greenhall (1961) mentioned
finding fruit pulp in stomachs of C. senex from Trinidad. Of the in-
dividuals that I captured on BCI, one defecated an unidentifiable fruit

TABLE 10.-FREQUENCY OF OCCURRENCE OF FOOD SPECIES OF A COLONY OF Carollia
 perspicillata As DETERMINED FROM FRUIT DROPPINGS AND SEEDS BELOW
 THE DAY ROOST. SAMPLING PERIODS BEGIN AT MID-MONTH.
Plant species Jan-Mar Mar-May May-Jul Jul-Sep Sep-Nov Total
Anacardium excelsum 5 83 39 127
Piper cordulatum 39 35 9 83
P. reticulatum 6 6
Piper 109 6 6
Solanum hayseii 1 1 2
Vismia 1 2 2 4
Quararibea asterolepsis 5 15 20
Cassia undulata 5 1 6
Unknown 155 12 12
Unknown R-1 3 q


Vol. 24, No. 4