102 
Psyche 
[June 
Text fig. 2. Infrared spectra (in carbon disulfide) of the secretion of 
Chlaenius and of authentic ra-cresol. 
sebacate on Chromosorb W, 80/100 mesh, at i66°C, with nitrogen 
as carrier gas). A dried carbon disulfide solution of the secretion 
yielded a major peak with retention time of 6.75 min., corresponding 
precisely to the single peak produced by authentic m-cresol. A com- 
plex second peak of short retention time in the chromatograph of the 
natural product indicated the presence of possibly several unknown 
minor constituents. 
It might be added that the odor of m-cresol is indistinguishable 
from that of the Chlaenius secretion. 
b. 7>-Cresol (/>-methylphenol) in Ahacion 
Secretion was obtained from two live millipedes by subjecting them 
to traumatic stimuli and taking up into capillary tubes the small 
droplets of secretion discharged at the gland openings. The analytical 
techniques employed were essentially those described above for 
Chlaenius. The infrared spectrum was found to be similar to that 
of an authentic sample of />-cresol (Text fig. 3), with the exception 
that the natural sample showed conspicuous bands at ca. 3.5 /x (C-H 
