650 PROCEEDINGS OF THE ACADEMY OF [Oct., 



the eye area extends from the eyes to about the middle of the thorax, 

 where it is laterally indented, and from the region of the dorsal groove 

 l^ackward becomes gradually narrower; on each side is a narrower, 

 submarginal buff -brown; the rest of the thorax is darker brown, with 

 radiating lines from the dorsal groove. Sternum buff, a little darker 

 than the coxse. Abdomen above much darker than the cephalothorax, 

 mainly chocolate-brown with black markings; at each antero-lateral 

 margin a black patch, a pair of white dots connected by a transverse 

 black line on the anterior dorsum, several pairs of black spots (the 

 most posterior of them connected by transverse black lines) on the 

 posterior dorsum as well as 2 or 3 pairs of white spots, and irregular 

 black streaks on the sides; the venter is yellowish in the epigynal 

 region, behind this light brown with a narrow dark brown from the 

 epigynum almost to the spinnerets and with numerous small black 

 spots. Chelicera reddish-brown with long black hairs; labium and 

 maxillce like the sternum. Legs pale buff, lighter beneath, vni\\ darker 

 annulations on the superior surfaces of all the joints. Spinnerets 

 choc olate-br o wn . 



Comparisons. — This form approaches most closely L. pratensis 

 Emerton, but differs notably in the structure of the epigynum, and 

 also in the coloration of the abdomen. 

 14. Lycosa (Trochosa) avara (Keys.). 



One mature ? from Philadelphia. 



Eyes. — First row almost straight, narrower than the second row 

 (the middle points of its lateral eyes are more lateral than the middle 

 points of the eyes of the second row), nearer to the second row than 

 to the margin of the forehead, its middle eyes slightly larger and a 

 little higher than its lateral eyes. Eyes of the second row largest, not 

 quite their diameters apart. Third row widest, its eyes nearer to the 

 second row than to each other. Dorsal eye area about one-sixth the 

 length of the cephalothorax. 



Form. — Cephalothorax highest at the dorsal groove, in front fully 

 one-half its greatest transverse diameter ; head rather low and its sides 

 moderately sloping. Sternum longer than broad. Labium less than 

 one-half the length of the maxillae. Chelicera strong, their length fully 

 double the height of the head in front. Legs stout. 



Diinensions. 



Length of cephalothorax, 5 mm. 



Length of abdomen, 6 "■ 



Length of first leg, 12 '' 



Length of second leg, 10.5 " 



