THE LINYPHIAD^ 



151 



Erigone autumnalis. — This is one of the few species of Eri- 

 gone that can be distinctly separated from the others. It lives 

 in the same places and is found with lojigipalpis 

 in the autumn flights. It is only a twentieth of 

 an inch long, but can be distinguished 

 by its light color and bright yellow 

 head. The palpi of the males have 

 the tibia shorter than the patella and 

 the tooth on the patella turned more 

 forward than in longipalpis, with a 

 longer and sharper point tapering 

 from the base to the tip (fig. 367). 

 Ceratinella laetabilis. — This is about 

 the same size as fissiceps, — a six- 

 teenth of an inch long, — but much 

 darker colored, and the males do not 

 have horns or humps on the head, 

 sternum are dark 

 The thick- 



367 



Figs. 366, 367. Erigone autumna- 

 lis. — 366, under side of cephalo- 

 thorax of male. 367, palpus of 

 male. 



The cephalothorax and 

 brown, and the legs dark orange. 

 ened circle on the abdomen (fig. 

 orange brown and the thinner 

 parts gray. In the female the 

 thick circle is usually wanting 

 and the whole abdomen dark 

 gray, with lighter spots around 

 the muscular marks. There are 

 also hardened spots around the 

 stem of the abdomen and under 

 the spinnerets in both sexes. 

 The head is slightly elevated 

 behind the eyes, a little more 

 in the male than in the female. 

 The male palpi (figs. 369, 370) 



368) is dark 



369 368 



Figs. 368, 369, 370. Ceratinella laetabilis. 

 — 368, outline of side of female en- 

 larged sixteen times. 369, 370, end of 

 male palpus. 



