P. DeBenedictis 1965 Lemnus trinacronator 24 June Barrow, Alaska - Still present in large number, at least 100 / acre on the beach ridge and along Elson hogon. Not at all hard to see 25-31 at one time within 50 feet in front of you. They are riding in the bluff and excavating short burrows, from which their familes usually protrude, in the degre ridge areas; they are quite keen to extract from these when they go in. Not easy to make them go into defense posture. They are about as common in the newly exposed areas of Central Marsh. There is considerable persist, as if breeding, is about to begin, and dead animals are appearing, on the tundra with increasing frequency. 25 June The Lemmings do not seem to be a numerous today as yesterday, only about 7/3's the # seen. The burrow systems are being rapidly enlarged. Saw one on the beach ridge which appeared to have paralyzed hind limbs. They are frightful than usual and quite vocal; about 8-10 closes were seen. Most seen seem to be fairly large. 26 June They are now very strikingly hidden on highlands, and burrow workings are extensive. Still gentle common. Saw 2 in Allagash, 3 in the tundra area for the 1st time today evening. 27 June Lemmings in about constant numbers everywhere in the north area but not heavily dug in. There are more in the Barrow area than I had thought; judging from the plant damage there are only a fraction of what we