66 THE CANADIAN ENTOMOLOGIST. 



RONCUS PACIFICUS, II. Sp. 



Length, 1.6 mm. Colour, pale whitish ; mandibles and claws of 

 palpi reddish ; femora of palpi sometimes reddish ; dorsal scutre of 

 abdomen yellowish-brown ; legs with a pinkish tinge ; young specimens 

 lighter than adult ones. Mandibles large, as in Chthonius ; cephalothorax 

 somewhat narrower behind than in front, sides slightly curved, one large 

 eye each side near anterior margin ; palpi not as long as body ; hand 

 with fingers almost as long as cephalothorax plus mandibles ; femur 

 about as long as cephalothorax, sides about parallel ; tibia almost conical, 

 almost as wide at tip as the hand at base ; hand not pedicellate, longer 

 than tibia, sides but little convex : fingeis longer than hand, about 

 straight ; legs short, hind pairs not much enlarged. Body and append- 

 ages with simple hairs. 



Washington State. [Kincaid.] A few specimens. 



Ideoroncus, Balzan. 



Allied to Obisium, but has only one eye each side of cephalothorax 

 and the claw of mandible has a prominent stylet. Species previously 

 known from South America. 



Ideoroncus obscurus, n. sp. 



Length, 3.2 mm. Colour, pale whitish ; anterior part of cephalo- 

 thorax with a reddish tinge, mandibles pinkish, palpi red, dorsal scutse 

 pale yellowish ; body soft. The mandibles have a long stylet, which is 

 divided into two parts ; the cephalothorax is a little narrower in front 

 than behind ; the eyes, hardly perceptible above, are two, one each side, 

 about its diameter from anterior margin ; the cephalothorax just in front 

 of eyes is more suddenly narrowed than elsewhere. Palpi shorter than 

 body ; trochanters almost twice as long as wide, the internal margin 

 about straight, external margin quite suddenly but not greatly swollen ; 

 femur not quite as long as cephalothorax and broader than trochanters, 

 pedicellate, internal margin at first convex then concave, external margin 

 convex, slightly narrower near tip than near base ; tibia shorter, pedicel- 

 late, external margin evenly convex, internal one convex, more so near 

 base than near tip ; hand as long as tibia, short pedicellate, much broader 

 than other joints, neither margin much convex ; fingers shorter than 

 hand, slightly curved, stout. Body and appendages with simple hairs. 

 Abdomen long, sides nearly parallel, not much broader than cephalo- 

 thorax. The outlines of trochanters can be distinctly seen on the femora 



