226 IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 



darker towards the joints, and covered thicki> with gray hairs. 

 The palpi are straw colored. 



This spider is found on plants throughout the summer and 

 early fall. It has previously been reported from the New 

 England states by Emerton and from Alabama, Georgia and 

 Florida by the Peckhams. 



Phidippus rufus Ilentz 184i). 



This species is represented by two females in our collection. 

 The cephalothorax is covered with reddish yellow hairs except 

 in the eye region, which is black. The chqieus has a thick cover- 

 ing of long white hairs. The sternum is black with a covering 

 of white hairs. 



The abdomen is brick-red and has a white basal band on the 

 dorsal side. There is a pair of black longitudinal stripes on the 

 posterior end. On these stripes there are two pairs of white 

 spots. The legs are brown with darker rings at the .joints. 



This spider is very widely distributed throughout the United 

 States. 



DENDRYPHANTES Koch 1837. 



The spiders of this g'enus are all of medium size and very 

 hair3^ The anterior row of eyes corresponds to that of Phid- 

 ippus; the middle eyes are midw^ay between tJje anterior lateral 

 and the posterior eyes. The ocular quadrangle occupies two- 

 fifths of the cephalothorax. While this is a large group, the 

 writer has been able to collect only the two following species. 

 Dendryphantes militaris Hentz 1845. 



These spiders are six to ten millimetres in length. The gen- 

 eral color is brow^n with a covering of gray and black hairs. 

 The abdomen of the female is marked with four pairs of white 

 spots dorsally, while on each side there are four oblique white 

 spots. At the basal end of the abdomen there is a white band. 

 The male is a lighter brown than the female with a ■v\^ite stripe 

 beneath the eyes and extending almost the length of the cephalo- 

 thorax, A white band around the sides of the abdomen extends 

 to the caudal end, ^nth four pairs of white spots on the dorsal 

 side. 



Comstock says that this spider rano-es over a large part of 

 our territory. Emerton has reported it fnmi the New England 

 states and Peekham from Pennsylvania and Alabama. 

 DendrypkmUes octavis Hentz 1846. 



This is a very beautiful and prominently marked spider. 



