Superfamily Argiopoidea 



Tetragnaiha straminea (T. stra-min'e-a). — This is the most 

 common species in the Northern States of the group of species 

 in which the lateral eyes of each side are more widely separated 



'Fig. 426. 

 TETRAGNATHA LABORIOSA, LATERAL ASPECT OF ABDOMEN 



than are the anterior lateral and posterior lateral eyes, the genus 

 Eu gnat ha of some writers. The length of the body is from one 

 fourth to three eighths of an inch. The cephalothorax is light 



Fig. 427- TETRAGNATHA STRAMINEA 



yellow with two parallel gray stripes. The abdomen is usually 

 three times as long as the cephalothorax (Fig. 427); it is silvery 

 white above and dark beneath with two parallel gray stripes. 



The male can be easily distinguished from our other two 

 species of this group by the character given in the table above. 

 In the case of the female the distinction between this species 

 and T. vermiformis is not so well-marked; but 1 am unable to point 

 out a more easily recognized means of separating the two. 



Tetragnaiha vermiformis (T. ver-mi-for'mis). — This species 

 is slightly larger than the preceding, the female measuring about 

 one half inch in length. The male is distinguished by the fact 

 that the tibia of the palpus is not longer than the patella. The 



414 



