38 



THE COMMON SPIDERS 



surrounded by distinct light rings. In some specimens, usually 

 immature, the abdomen has a more distinct yellow and red 

 pattern (fig. 108). The male (fig. 109) has the thorax and legs 

 darker and the abdomen less bright red and yellow than the 

 female, sometimes gray and iridescent. 



Ebo latithorax. — In color and general appearance this resem- 

 bles Philodromus, but is at once distinguished by the length 

 of the second legs, which are more than twice as long as any 



of the others (fig. 111). The thorax is wider 

 and the abdomen is wider than in 

 Philodromus. The head is nar- 

 row and rounded in front. The 

 front middle eyes are largest 

 and farthest forward. The 

 colors are gray and white, with 

 black spots in the darker parts, 

 as in Philodromus. The length 

 is not much over an eighth of 

 an inch and the length of the 

 longest legs quarter of an inch. 

 Tmarus caudatus. — This spi- 

 der is about as large as PJiilo- 

 dromiis vulgaris and similarly 

 colored, but may be distin- 

 guished from it by the height of its abdomen and the short tail 

 or projection over the spinnerets (fig. 113). The thorax is 

 round at the sides and square in front, and the mandibles are 

 inclined forward so that they can be seen from above. The 

 two rows of eyes are farther apart than in Philodromus, and 

 the lateral eyes of both rows are raised on tubercles. Among 

 the eyes are several black spots that may be mistaken for 

 extra eyes, and there are similar spots on the legs, most 

 thickly on the front pairs. On the back of the thorax are 



Figs. 112, 113. Tmarus caudatus. — 112, 

 female enlarged six times. 113, left side 

 of the abdomen. 



