del Norte. From the locality, this amber has been named 
Bucaramangite. Since it was found in alluvium, it might 
have been transported some distance from beds of any 
age. The sample analyzed came from a pale yellow trans- 
parent piece that weighed 12 kg. It is insoluble in alco- 
hol, swells and becomes opaque in ether and does not 
contain succinic acid. 
Four spectra were run from USN M collection #R7317. 
Three spectra (Plate X XVI) were similar to Type I 
(H 429). Another spectrum was like Type II (H 208) 
which had a better resolved version of Type I. 
Cockerell (1928) reports two species of Diptera in 
amber from the Valle de Jestis in the Departamento de 
Santander del Sur. He characterized it only as being 
‘‘relatively soft’’ and of ‘‘uncertain age. ”’ 
Amber from Medellin, Colombia, is also available from 
USNM collection #97466. Although it is listed as ‘‘co- 
palite,’’ we are unaware that its geologic age or its chemi- 
eal or physical description have been published. Six 
spectra were run and H 359 (Plate X X VI) is represent- 
ative of them. 
The spectra represented by H 208 (Girén) and H 359 
(Medellin) can be related generally to spectra of Hy- 
menaea Courbaril, just as in the case of amber from Chia- 
pas, Mexico. In previous discussions of Chiapas amber 
(Langenheim and Beck, 1965; Langenheim, 1966; 
Langenheim, 1967), spectra of resin from modern pop- 
ulations of Hymenaea Courbaril were compared from 
Mexico, Guatemala, British Guiana (Guyana), Brazil, 
Venezuela, and Ecuador. Considerable similarity in the 
spectra throughout the wide distribution of this popula- 
tion was noted, although certain populations were more 
similar than others. For example, spectra of the Chiapas 
amber resembled more closely the spectra of Hymenaea 
resin from populations in Mexico and Guatemala than 
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