206 THE CANADIAN ENTOMOLOGIST. 



( Femur I. longer than width of body Phalangium 



\ Femur I. not longer than width of body Mitopus 



Trachyrhinus, Weed [Am. Nat., 1892], is unknown to me; it appears 

 to be near Homolophus, but with more slender legs, more spinose palpi, 

 with a different patella, and larger eye-tubercle. Wood's description of 

 P. /avosum, however, reads much like Mitopus biceps, Thorell. 



These genera I arrange in four tribes. 



Protolophini. 



This embraces the single genus Protolophus, remarkable for the 

 structure of the male palpi. 

 Protolophus, gen. nov. 



In the male the second, third and fourth palpal joints are greatly en- 

 larged, and the fifth joint is a little shorter than the fourth ; the claw at 

 the end of the fifth is, however, distinct. The female has the palpi more 

 normal, the fifth joint longer than the fourth, the third joint is prolonged 

 on the inner side, as in Prosalpia, and the fourth has a small projection 

 at tip on the inner side. The eye-tubercle is low, with two rows of small 

 spines. The legs are short, femur II. being shorter than the body ; 

 tibiae without false articulations. The dorsal parts of the first five 

 abdominal segments are more united than those beyond, each of these 

 five segments having a median pair of large tubercles. Two species are 

 known to me. 



Abdominal tubercles unarmed tubercuiatus. 



Abdominal tubercles with a kw apical spines singularis. 



Protolophus tubercuiatus., n. sp. 



Length, 8 mm. ; femur I., 2.3 mm. 



Colour — Gray to brownish, the cephalothorax gray, the dorsum of ab- 

 domen darker, somewhat reddish-brown. Body with a broad, darker, 

 median stripe, beginning at the anterior margin of the cephalothorax and 

 extending to the sixth abdominal segment, narrower and darker on the 

 abdomen than on the cephalothorax. Just below the front margin of the 

 cephalothorax are two small median spines. The venter is pale grayish 

 with a few brown spots near the sutures, the tips of the mandibles black, 

 the coxie brownish, the trochanters yellowish, the femora, patellae and 

 tibiae reddish-brown, the metatarsi yellowish, the tarsi gradually becoming 

 darker, the abdominal tubercles black. The legs are covered with small 

 spines, on each side of the coxae there are rows of small black plates. 



The female is similar, but the dorsum is more reddish, the venter more 



