J. H. Emerton — New England Epeiridce. 325 



spirals bave been placed over about a quarter of tbe web the spider 

 begins to turn back on reaching the ray next the thread to the nest 

 and passes around to the next on the opposite side. When the final 

 spirals are put on, this segment is left open from the circumference 

 to the center. After catching and tying up an insect she attaches 

 it to the spinnerets and carries it to the nest. 



Many trees have been brought to Wood's Holl from the north of 

 Europe for cultivation, so that it is possible for these spiders to be 

 imported. I have not seen them nor heard of their presence else- 

 where in New England. 



Cyrtarachne Thoreii. 



Voyage of the Swedish frigate, Eugenie, 1868 = Cyrtogaster KeyserHng, Sit- 

 zuDgsberichte der Isis, Dresden, 1863. 



The name Cyrtogaster was used earlier for a genus of Hymenoptera. 



These spiders are all short with the abdomen wide in front and 

 partly covering the thorax and usually have spines on both thorax 

 and abdomen. 



Cyrtarachne bisaccata, new. 



Plate XXXIV, figures 11, 11a. 



Female 8""° long. Abdomen 8™'" wide. The head is low and wide. 

 The eyes all small, the four middle forming nearly a square on a 

 slight elevation. The head is slightly narrowed behind the eyes. 

 The cephalothorax is slightly scolloped at the sides. It rises from 

 the eyes backward and has at the highest part behind the middle 

 two large horns. The back is covered with conical scattered points. 

 The cephalothorax is light brown darkest in front. The abdomen is 

 wider in front than long and extends over the thorax as far as the 

 two horns. The four principal muscular spots are large and dark 

 brown. The front of the abdomen is light brown with various 

 whitish irregular markings, the back part is yellowish white. The 

 under side of the body and legs are white except the ends of the 

 first and second femora which are grayish. 



Only one specimen of this was found on a beech tree at New 

 Haven, Conn., Oct. 22, 1882, with two cocoons. These were dark 

 brown, as dark as the bark of the tree and as hard. Around the 

 middle of each was a circle of irregular points. PI. xxxiii, fig. 12, 

 One of the cocoons was attached by a strong stem to the bark and 

 the other was attached in a similar way to the first cocoon. The 

 spider held on to one of the cocoons. The following spring another 

 similar pair of cocoons were found on a low oak tree in Pine Swamp, 



