Theridion intervallatum. new sp. ' ' 



Male 1.5 mm. long. Abdomen nearly spherical and lialf larger 

 than the cephalothorax. The cephalothorax is slightly yellow with 

 an indefinite middle line between the eyes and the dorsal groove. 

 The back of the abdomen is light at the sides and has a darker 

 pattern in the middle consisting of four pairs of dark spots between 

 which are opaque white spots and fine black dots of different sizes. 

 On the under side the abdomen is dark at the sides and light in 

 the middle. The sternum is light like the back of the cephalo- 

 thorax. The legs are marked with small and irregular black spots 

 near the ends and middle of each joint. The male palpi have the 

 tarsus and palpal organ narrow with the tarsus twice as long as 

 wide. At the end of the tarsus are a few stiff hairs twice as thick 

 as the others. The palpal organ has the appendages small and 

 simple, with the tube and two other processes lying side by side, 

 pointing toward the end of the palpus. Figs. 1, la, lb. PI. I. 



Intervale, N". H., July, 1913, Miss E. B. Bryant. 



Theridion aurantium. new sp. 



Female 3 mm. long; cephalothorax 1 mm. Male with cephalo- 

 thorax as long as in the female, but much smaller abdomen. The 

 cephalothorax is orange in both sexes, without any middle or 

 lateral stripe, rarely in females dark gray. The legs are pale 

 yellow in females and orange in males. The first leg of the male 

 is two and a half times the length of the whole body. The 

 abdomen of the female is commonly light gray with opaque white 

 markings at the sides and in pairs along the middle. Black spots 

 may also occur in one or more pairs, and in some individuals cover 

 nearly the whole abdomen. Fig. 2, 2a. PL I. In males the 

 abdomen is commonly pale, with a pair of black spots at the sides 

 toward the hinder end, and these spots may be lengthened into a 

 pair of stripes, or the whole back may be black. Fig. 2b, 2c, 2d. 

 PL I. The mandibles of the male are so long that with the height 

 of the head they are as long as the cephalothorax. They are not 



