REVISION OF NEARCTIC TERMITES. 123 



I saw this large species /yin^ at Clark's Ranch, Mariposa County, June 3-4; in 

 Yosemite a few days later (altitude of the valley 4,000 feet). I suppose, therefore, 

 that lower in the valley they fly much earlier. I saw them again about Lake Tahoe 

 (6,200 feet altitude), July 18. They were very numerous in the air about sunset. I 

 observed a very large stump of Pinus ponderosa covered with specimens, which, after 

 alighting, got rid of their wings and were running about on the horizontal surface of the 

 trunk, examining the crevices, but not attempting to descend into them. Torn-off 

 wings were lying in numbers on the trunk. On the previous day (July 17) I had seen 

 the same species flying about at Summit, Sierra Nevada, altitude 7,042 feet. I 

 observed a pine trunk out of which they were emerging — a proof that they actually 

 live and breed at that altitude. July 22 the same were flying about Webber Lake 

 7,000 feet altitude. I observed a couple of blue birds which had their nest on the 

 veranda and fed their young with these termites. 



Winged adults of angusticollis in the United States National 

 Museum which have been collected while flying bear the following 

 labels: Shawnigan, Vancouver Island, British Columbia, "L, 1.9," 

 H. G. Dyar; Victoria, Vancouver Island, British Columbia, 2/IX, 4/IX, 

 and 16/IX, 1917, W. B. Anderson; Cottage Grove, Oregon, Septem- 

 ber, A. P. Morse. B. T. Harvey collected adults ready to swarm in 

 a stump at Ashland, Oregon, August 28, 1913. H. G. Hubbard 

 collected adults flying at Lake Tahoe, California, "7/8, 1891." 



Mrs. M. A. Knickerbocker, in a letter to the Bureau of Entomology, 

 stated that in October, 1903, at San Francisco, California: 



the air was full of them ( Termopsis angusticollis or nevadensis) — mnged adults. They 

 came in the open windows in the evening, getting into our hair and ears. Next day 

 they were gone, but wingless ones were found and also wings. 



A. E. Bush collected ^vinged adults of angusticollis on November 16, 

 1881, September 28, 1891, and October 5, 1891, at San Jose, Cali- 

 fornia. 



The writer collected winged, maturely pigmented adults ready to 

 swarm in a stump. Little Bear Lake, San Bernardino Mountains, 

 California, elevation 5,000 feet, Jime 1, 1917. A large first form 

 queen of T. angusticollis was also found in a near-by colony (fig. 65) ; 

 young were present. 



Other winged adults in the United States National Museum bear 

 the labels: Los Angeles, California., August; San Gabriel MountainSj, 

 California, elevation 3,000 feet, October 9, 1908, F. Grinnell. 



At Ashland, Oregon, at an elevation of 3,500 feet, H. G. Champiois 

 found a colony of angusticollis or nevadensis in which the colonizing 

 adults were expanding the wings and attaining mature pigmentation 

 on May 10, 1915. There were also mature nymphs, nymphs in and 

 after the quiescent stages, and soldiers in this colony. On May 11, 

 in a valle}^ at an elevation of 1,900 feet, adults were seen swarming 

 from a colony. 



At Waldo, Oregon, near the coast, adults of Termopsis were collected 

 flying on September 14, 1916, by J. E. Patterson. Fifty to sixty 

 adults were flying in a swarm at 6 p. m. around an old pine stump. 



