318 University of California Publications in Zoology. (Vou. 5 
The type and for thirteen years the only known specimen of 
Euderma maculatum, now in the American Museum of Natural 
History, was taken near Piru, Ventura County,’ California, 
“caught on a fence,’’ in March, 1890. 
A second instance came to the notice of mammalogists 
through the record by G. S. Miller, Jr. (Proe. Biol. Soe. Wash., 
XVI, November, 1903, pp. 165-166) of a specimen ‘‘found dead 
in the Biological Laboratory of the New Mexico College of Agri- 
culture and Mechanic Arts, at Mesilla Park, New Mexico, in 
where it was 
September, 1903.’’ This specimen, the skull of which is figured 
by Mr. Miller (‘‘Families and Genera of Bats,’’ 1907, p. 226), 
is now in the United States National Museum (no. 122,545). 
According to F. Stephens (Calif. Mammals, 1906, p. 264), a 
third specimen has been recently captured at Yuma, Arizona. 
The specimen now recorded thus affords the fourth record 
station for the species. Two of these are in California, one in 
Arizona, and one in New Mexico. 
The coloration of this animal, suggesting the ‘‘death’s-head’’ 
pattern displayed upon the thorax in certain moths, is, as far 
as I am able to learn, unique among bats. Some adaptive fune- 
tion is suggested by the recurrence of this pattern among dis- 
tantly related groups of animals. Conspicuously contrasted 
black and white markings appear to be prevalent among crepus- 
cular birds, as nighthawks and poor-wills, and have been thought 
to be directive in meaning. As indicated by the above data, the 
habits of Huderma maculatum remain wholly unknown. 
1 Dr. C. Hart Merriam (N. Am. Fauna, no, 13, 1897, p. 49) gives his 
belief that the type was taken at the mouth of Castae Creek, in the 
Santa Clara Valley, Los Angeles County; this is eight miles from Piru, 
in the same valley. 
