1909] EMERTON — SPIDERS 95 
of these species do not differ. ‘The meso- and metasterni as well as the prosternum 
of both sexes are spinose in both species. ‘The thorax of victoriae is very little ele- 
vated posteriorly, often scarcely at all. The basal spine of the anterior tibia of 
spinosa is often broken off, represented only by a scar. 
The females of the two species show the following measurements: 
Rehnia victoriae. 
Length: pronotum, 8 mm.; elytra, 14 mm.; hind femora, 30-32 mm.; ovi- 
positor, 35-38 mm.; width: pronotum at posterior border, 4 mm.; hind femora at 
widest part, 3.5-4 mm. 
Rehnia spinosa. 
Length; pronotum, 10.5-11 mm.; elytra, 21-22 mm.; hind femora, 39-40 mm.; 
ovipositor, 45-46 mm.; width: pronotum at posterior border, 7 mm.; hind femora 
at widest part, 5-5.5 mm. 
SprpERS IN WINTER FLoops.— On February 10, 1909, there was a heavy rain 
which flooded low fields and the borders of swamps and ponds, and on the 12th 
I went to Tyngsboro, Mass., and joined Mr. Frederick Blanchard in a hunt for 
Spiders and Coleoptera on the ice. The thermometer had fallen to 14 in the night 
‘but the day was calm and became slowly warmer. In the open fields the water had 
partly drained away leaving thin ice on which spiders were scattered, most of them 
being near the line of dust that marked the highest water. On the larger ponds and 
swamps they were still more numerous around the banks and along lines of rubbish 
that had floated together on the ice. A few had died and were frozen in the ice, 
_others were frozen down by the feet but were still alive and thawed out later in the 
day. Nearly all, however, were free in the ice, which along the edges of the floods 
had frozen under them. They were too cold to move but as the air became warmer 
revived and groped slowly about without any definite direction. By noon some of 
them became quite active and climbed grass and bushes and spun threads, the ther- 
mometer at this time being 35 in the shade and 40 to 50 in the sun. ‘The most active 
species ‘was the little 'meticus terrestris, which was abundant in a maple swamp on 
the ice and in bushes up to a foot from the ground. The greater number of spiders 
were young Lycodidae of all the common species. With the spiders were great 
