190 MEMOIRS ON THE COLEOPTERA. 



widely separated gular sutures; it is of more especial interest as 

 indicating the apparently extreme eastern extension of the genus. 



Orus Csy. 



Orus provensis n. sp. Slender, rather shining, black, the legs and antennae 

 piceous; head a little longer than wide, parallel, with rounded basal angles, 

 very finely, closely punctate, the eyes slightly prominent; prothorax elon- 

 gate, only slightly narrower than the head, the width at base but little less 

 than at the broadly rounded apical angles, the punctures much coarser than 

 those of the head and sparser, the narrow smooth median line distinct; elytra 

 not quite a fourth longer than wide, parallel, a third wider than the pro- 

 thorax and slightly longer, finely but strongly, closely punctate; abdomen 

 much narrower than the elytra, dull, very minutely and densely punctulate. 

 Length 3.5 mm.; width 0.4 mm. Utah (Provo), Wickham. 



Closely resembles longicollis, from Lake Tahoe, but stouter, with 

 the head more elongate, the prothorax less narrowed from apex 

 to base and more strongly punctured, the elytra much less elongate 

 and relatively less exceeding the prothorax in length and the anten- 

 nae a little shorter. The width given for longicollis in my original 

 description is a decided error, as it does not greatly exceed 0.35 mm. 

 A single female example. 



Pseudorus n. gen. 



This name is suggested for Orus cervicula and two other species 

 here described. It resembles Orus in all its parts very closely, but 

 departs so radically in the conformation of the neck, that it does not 

 seem proper to include the species named with Orus. The neck in 

 Orus is notably thick for a Scopseid genus, but here it is very minute 

 and thin as in Scoptzus. No species of Scopceus that I have seen 

 has any indication of the shining surface lustre and loose punctua- 

 tion of Pseudorus. Besides cervicula we have the two following 

 species: 



Pseudorus spectralis n. sp. Small and very slender, shining, black, the 

 legs and antennae piceous; head somewhat longer than wide, slightly inflated 

 basally though not wider there than across the eyes, which are at about 

 twice their own length from the base, the basal angles rounded; antennae 

 rather short, the basal joint as long as the next three; prothorax elongate, 

 very much narrower than the head and still more minutely and loosely 

 punctate, widest behind apical third, the sides anteriorly evenly rounded 

 and converging to the neck, but little narrowed basally, the smooth median 

 line feebly denned; elytra parallel, fully a third longer than wide, nearly 

 one-half wider than the prothorax and much longer, wider than the head, 



