228 J. H. Emerton — Neii:) England Attidm. 



The color of both sexes is black, with black mixed with a few white 

 hairs. The legs are gray in the middle of the joints and black toward 

 the tips. The abdomen has a white band around the front and is 

 marked with three large white spots, the middle one corresponding 

 to the second pair in inuUiforniis and mystaceus and the other two 

 to the third pair. The other spots are generally present in this species 

 but so small as not to be readily noticed. The under side of the body 

 is black with two indistinct light stripes under the abdomen. The 

 mandibles are metallic green and blue. 



The males are 6 or V""" long and colored like the female. The 

 mandibles have a short blunt tooth in front over the claw. Fig. 5ci. 



The male palpi have the tarsal hook pointed and turned down- 

 ward. Fig. 5c. The palpal organ is wider at the base than in most 

 species. Fig. 5h. 



It lives under bark and stones, hibernating half grown in thick 

 silk nests and concealing its egg cocoons in the same places. It is 

 common all over the United States. 



Dendryphantes aestivalis Peckham, issa. 



D. capitatus Peckham, 1885. Resembles Alius capitatus anA parvus Flentz. 



Females 5 or 6"'"' long and males smaller. There are two varieties 

 in the colors of the females. The light variety, PI, XVII, fig. 2, has 

 the light parts white or light yellow and the dark parts dark brown 

 covered with white hairs and scales. The cephalothorax is dark 

 brown thinly covered with scales so that the dark color shows 

 between them in spots. The legs are light yellow and translucent, 

 indistinctly ringed with brown at the base, and near the tij) of each 

 joint all covered with greenish white hairs. The palpi are light and 

 Avithout rings except on the femur and patella. Abdomen brighter 

 yellow than the thorax with four pairs of purplish brown spots, the 

 second pair largest, connected with a paler brown middle marking. 

 Abdomen' beneath with a pur2:)le brown stripe in the middle and 

 oblique brown stripes at the sides. Sternum, maxillje and mandibh's 

 light brown. Scales smaller than those of the dark variety. 



The dark variety, fig. 2h, is generally smaller and covered Avith 

 longer hairs and scales. The legs and ])alpi are more distinctly 

 ringed witli dark brown. The dark spots on the abdomen are smaller 

 and more connected by dark lines than in the other variety. The 

 under side is dark brown. 



In alcohol they become in a few days bright red in the darker 

 parts which afterward fade and I'emain dull red for a long time. 

 Both varieties in alcohol look much alike. 



