June, I9IS.] Aldrich : The Deer Bot-Flies. 147 



name occurs in the text. Osten Sacken, Cat., 1878, 145, says the 

 larvae were from the throat of the deer. 



In Zweifl. d. Kais., Mus. zu Wien, iii, 82, 1883, Brauer mentions a 

 species occurring in the throat of Ccrvns incxicanus in Durango, 

 Mexico; in the same series, vii, 547, 1893, Brauer and von Bergen- 

 stamm apply the name Ccph. mcxicana to this undescribed larva. 



Riley and Howard, Insect Life, i, 386, 1889, report larvae sent in 

 from California, taken from a "pocket under the jaw" of deer, and 

 said to be common; referred doubtfully to Ccphcuomyia, but from 

 the habit pretty certain to belong here. 



The same, ii, 116, 1889, note occurrence of larvae of this genus in 

 nasal passages of man near San Bernardino, Cal.; more than 40 

 larvae were removed. 



The same, iii, 162, 1890, note on larvae in the throats of hogs in 

 West Virginia; doubtfully referred to this genus. 



Mr. W. L. McAtee, of the Bureau of Biological Survey, Washing- 

 ton, writes under date of May 13, 1915, that his Bureau received this 

 spring from Aragon, N. M., the larynx of a mule deer in which were 

 a large number of the larvae of a fly of this genus. 



The behavior of adults is entertainingly described by Brauer, and 

 as I have never seen the passage in English, I translate with some 

 abridgement from his Monograph, pp. 184-187: 



" The behavior of these flies is quite varied. Some species are 

 very dull and sit in the cage for weeks without seeking liberty; others 

 however, as soon as their wings are fully developed, begin to beat 

 against the walls so vigorously that care must be taken not to let 

 them live longer than necessary. One of the dullest kinds that I 

 have observed is Ccphcnomyia rufihayhis, while Cephenomyia stimu- 

 lator and Pharyngomyia picta are very active. The first, as one 

 would expect, does not fly far from the haunts of its host, while the 

 other two ascend high in the air and greet the mountain-climber as 

 he gains the summit, even in the Alps, where they fly back and forth, 

 pendulum-like, before him, and alight upon him. At lower tempera- 

 tures they are more quiet, and as this condition usually prevails at 

 summits, they are commonly found sitting on warm stones. On some 

 days Cephenomyia stimulator, which more than the others ascends 

 the highest Alpine summits, occurs in abundance at these heights, 

 where many individuals dart wildly at each other or buzz close around 



