J. IT. Enierton — New England TherkUdce. 59 



Boston, Mass., and New Haven, Conn. 1 have also found a few 

 specimens under leaves in woods. 



Erigone longipalpis? 



Plate XVII, figures 9 and 10. 



Of this group, whatever it may be called, I have a large number of 

 specimens, which I am unable to separate into distinct species, 

 though there are great differences among them. The size varies 

 from i'5™°^ to 2'5'""\ The color of the cephalothorax and legs varies 

 from dark gray to bright orange-brown. The maxillae are thickened 

 at the base more in the males than in the females. The mandibles of 

 the males are long and thick in the middle but narrowed toward the 

 base. The male palpi are very long but the length and shape of the 

 different joints varies greatly in different individuals. The most 

 common form, an average specimen of which is drawn in Fig. 9, has 

 the patella and tibia of nearly equal length and both together about 

 as long as the femur. This, however, varies in different individuals. 

 The palpal organ has the tube short with a curved tooth on the end 

 beyond the opening. Near the tube are two soft appendages and 

 various teeth and processes as in other varieties. I have found these 

 abundant in Boston and New Haven on fences in November and 

 October. They have been named Erigone dentigera by Cambridge, 

 in Proc. Zool. Sec. London, 1874. With the above occurred another 

 variety, Fig. 10, which Cambridge identiiied with the European longi- 

 palpis. It is somewhat larger and brighter colored on the cephalo- 

 thorax and legs. The head is more abruptly elevated, the palpi are 

 longer, and the teeth on the femur and around the edge of the thorax 

 are larger. The palpal organ is longer and the tube has a longer and 

 straight point, Fig. 10a, beyond its opening. A male from Essex, 

 Mass., has the head higher and the palpi nearly as long, but the tibia 

 is shorter and much widened at the end. Another male from Danvers, 

 Mass., has the same flaring tibia and similar palpal organ, but is 

 smaller and has much shorter palpi than most of the others. The 

 epigynum in the most common form has a large opening covered by 

 a projecting hood, around the edge of which is a thickened rim that 

 may be mistaken for the tubes of the spermatheca3. I have numer- 

 ous females which I am unable to classify or to connect Avit-h the 

 varieties of males. 



