captured in Montrealy Upper Canada. 431 



Family Thomisid^. 

 Genus Philodromus, Walck. 

 PMlodromus ohscurus^ n. sp. 



Length of an immature female -yV of an inch ; length of 

 the cephalothorax xV? breadth -V ; breadth of the abdomen -^ j 

 length of a leg of the second pair -f j length of a leg of the 

 third pair -2%-. 



The eyes are disposed on the anterior part of the cephalo- 

 thorax in two transverse curved rows, forming a crescent 

 whose convexity is directed forwards ; the lateral eyes, which 

 are seated on small tubercles, are rather the largest of the 

 eight. The cephalothorax is short, broad, convex, glossy, 

 compressed before, truncated in front, rounded on the sides, 

 and depressed at the base ; a broad, pale, brownish-yellow 

 band extends from its anterior margin along the middle ; and 

 the sides, which are of a dark-brown colour, have a longitu- 

 dinal row of minute yellowish-white spots near their superior 

 border, and a few spots of the same hue on their lateral 

 margin. The falces are short, cuneiform, vertical, and of a 

 brownish-yellow hue, with a brown spot at their base, in front. 

 The maxillse are pointed at the extremity and inclined towards 

 the lip, which is triangular and pointed at the apex ; and the 

 sternum is glossy and heart-shaped. These parts are of a 

 pale yellowish-white colour, the base of the lip having a brown 

 hue. The legs are provided with hairs and a few fine spines ; 

 they are of a pale brownish-yellow colour, and are marked with 

 minute black spots, particularly on the femora, and with red- 

 dish-brown annuli at the joints ; the second ^sax is the longest, 

 then the first, and the third and fourth pairs are nearly equal 

 in length ; each tarsus is terminated by two curved pectinated 

 claws, below which there is a small scopula. The palpi are 

 short, and resemble the legs in colour. The abdomen is ovi- 

 form, somewhat depressed, notched at its anterior extremity, 

 and thinly clothed with pale hairs ; the colour of the upper 

 part is yellowish-grey ; a pale-brown triangular spot, whose 

 vertex is directed forwards, occurs at its anterior extremity, 

 and is followed by four depressed brown spots forming a 

 quadrangle, the posterior pair being much the most conspi- 

 cuous ; a brown line passes from each of the posterior spots to 

 the yellowish- white coccyx, where the two meet, and numerous 

 transverse cm'ved rows of minute brown spots pass to the 

 sides, which are of a dark-brown hue, their irregular superior 

 margin being penetrated by several oblique white streaks ; 

 the colour of the under part is yellowish-white, and that of the 



