228 IOWA ACADEMY OF SCIENCE Vcr,. \XV. UUS 



This species has previously been reported by Peckham from 

 New York, Pennsylvania, Wisconsin, Iowa. Tennessee and 

 Alabama, and by Emerton from the New Enuland states. 



THIODINE Simon 1900. 



This genus can I'eadily be identified by four setu', arram^ed 

 in pairs, with bulblike swellings near the l)ases. on the under 

 side of the tibife of the first legs. The function of these set* 

 is not known although some authors claim they are used as 

 sense organs. Otherwise the characteristics of this genus are 

 the same as those of Dendn'phantes with which it has frequently 

 been confused. 



Thiodimi sulrainis Ilentz 1846. 



The eephalothorax is yellow with l)rown markings. The eyes 

 are located on dark l)rown spots, and between the eyes there ard 

 also brown spots. The pointed abdomen is a liiilit brownisli 

 yellow with three lighter stripes running longitutlinally on the 

 dorsal side. A row of dark brown spots runs along the dors i" 

 stripe. A single female measuring seven millimetres in lengt'i 

 is in our collection. It was collected by Professor Gillette ami 

 identified by Banks. Professor Comstock states that this is a 

 southern species, and distributed from the Atlantic to the 

 Pacific. 



ICIUS Simon 1876. 



The eephalothorax is low with the sides nearly i)araliel. The 

 ocular quadran.Lile takes up less than one-half the length of the 

 eephalothorax. The single species with which the writer has 

 worked has the middle row of eyes nearer to the anterior lateral 

 than to the i)osterior eyes, although Comstock says that the 

 position may var\-. 



Ic'n(<t c1ega)U'< Keyserling 1898. 



This is a sunill irridescent bronze-green s]>ider measurinu 

 about six millimetres in lenuth. The ceph ilothorax is marked 

 alon^ the lower margin with a white sti-ipe. The onl\- in;irkin'i: 

 on the abdomen is a white hasal hand. The legs are straw 

 colored with the fenuir of the lirst |)aii' almost entirely l>laek. 

 All of the legs are marked al)ove with a r.arrow black lor.g:- 

 tudinal strijie. 



This species has heen rcjiortcd thronuhont the eastern half of 

 the United States. There is but a single specimen in the Ames, 

 collection. 



