450 J. H. Emerton—New England Spiders of 
is nearly as dark as the upper side, and the sternum has the same 
color while volupis is usually light colored beneath. 
‘Fhe males differ less from the females than in volupis. They are 
colored a little darker than the females. The light stripe on the ab- 
domen is narrower and in some individuals wanting. The male palpi 
are long and slender. The tibia is more than twice as long as wide. 
The two spined process ts very small and close to the base of the 
tibia. The tarsus is smaller than in volupis, and the palpal organ 
very much smaller and more simple, PI. 1x, fig. 9a. 
On grass and low bushes all over New England. 
This species (or 2. volupis) is probably Hertz’s Theridion 
foliaceum. 
Amaurobius ©. Koch. 
The genus Amaurobius contains our largest spiders of this family. 
In general appearance they resemble the stouter species of the genus 
Tegenaria, but do not have the long upper spinnerets of that genus. 
The head is large and high, and wide in front. The eyes are in two 
rows, only slightly curved, and are all small and of nearly the same 
size. 
The maxille are long, and at the tip curve inward a little over the 
labium. The labium is longer than wide and a little narrowed at the 
tip. The mandibles are very large and strong. 
The whole body is thickly covered with fine, short hair, giving it 
a soft velvet-like appearance. The spines on the legs are small and 
concealed by the hair. 
The calamistrum consists of two rows of hairs, those of the outer 
row being much curved and close together, and those of the inner 
row three or four times as far apart. Pl. x, fig. 1f The cribellum 
is long and narrow and divided in the middle, PI. x, fig. le. 
The colors of all our species are much alike. The cephalothorax 
and legs are dark brown, except in freshly moulted or young speci- 
mens, and the abdomen is dark gray with a double row of oblique 
light markings. 
The webs are large and loose, often filling a cavity in a rotton log 
or under stones. There appears to be little regularity in the shape 
of the web or arrangement of the threads. The whole web is made 
of smooth silk and the band of curled threads is afterwards attached 
to parts of it as in Pl. x, fig. 1g. 
The sexes are about equal in size. The male palpi are large. 
Their tibial joints are short and wide and furnished with large pro- 
cesses of various shapes. 
