406 J. H. Emerlon, 



Prosthesima rufula Bks. Phil. Acad. 1892. 



This is the only brown species found in New England, the others 

 all being black or gray. A new figure is given of the male palpus, 

 showing better the form of the palpal organ than the one in Trans. 

 Conn. Acad. 1909, PL V, fig. 7. The peculiar form of the tibial 

 hook is correct in both figures, but the tube of the palpal organ is 

 slender and does not extend the whole length of the outer side of 

 the tarsus. 



Prosthesima depressa Em. Conn. Trans. Acad., Vol. Ill, 1890. 



Only the female was described in 1890. The males are 5 mm. 

 long and resemble the female. The general color is black but the 

 tcirsus and metatarsus of legs 1 and 2 are pale, contrasting strongly 

 with the black of the other joints. The legs 3 and 4 are pale 

 with darker color toward the ends of the joints, nearty covering 

 the tibia. The male palpi have the tarsus more pointed than 

 in atra, with the tube of the palpal organ directed toward the 

 tip. PI. V, fig. 8 c. The tibia has a process on the outer side 

 that varies in form. In some individuals it is sharply pointed, as 

 long as the diameter of the tarsus, and nearly straight ; in others 

 it is of the same length and curved, while in others it is short and 

 rounded at the end and curved nearly at a right angle. Figs. 8, 

 8 a, 8 b. All these forms of the tibia have been found in specimens 

 collected in the same place at the same time. 



Blue Hills, Milton, near Boston, Mass., Three ^lile Island N. H. 



Prosthesima transversa^ new. 



Male 5 mm. long. Two specimens dark-colored and one light, 

 apparently lately molted, but neither showing the contrast between 

 light and darks markings which is conspicuous in depressa. The 

 palpi have the tarsus larger than in depressa and the tibia thicker, 

 with the process straight and the tip flattened and rounded and 

 not much curved. PI. V, fig. 9. The palpal organ is distinctly 

 different from that of the other species, the tube turns forward and 

 ends in the notch at the tip of the tarsus as usual, but at its base 

 begins a slender process nearly as long as the tube which crosses 

 it to the outer edge of the tarsus. The basal processses of the 

 bulb differ slightly in the different individuals, but in all are longer 

 and more slender than in depressa, Figs. 9 a, 9 b. 



Blue Hills and Middleboro, Mass., New Haven, Conn. 



