June, 1897.] LiNELL : NeW NorTH AMERICAN CURCULIONID^. 53 



Onychobaris rufa, sp. nov. 



Oval, convex, shining, entirely rufo-ferruginous, clothed with very short, incon- 

 spicuous setoe ; beak shorter than the thorax, strongly arcuate, not tapering to apex, 

 second funicular joint one-half longer than the third; thorax scarcely wider than long, 

 strongly constricted and tubulate at apex ; sides distinctly tumid between the con- 

 striction and the middle, fully as broad there as at the base, subsinuate behind the 

 middle ; disc punctured as in O. sublonsa Lee, the punctures circular, less than one- 

 third the width of the scutellum, not in contact (m the middle but rugosely confluent 

 at the sides; elytra at base not wider than thorax, scarcely one-half longer; sides be- 

 hind the humeri decidedly convergent ; stria; abrupt, not very broad, obsoletely punc- 

 tate ; intervals flat, twice as wide as tlie grooves, coarsely and closely but not 

 deeply punctate, the third and fifth wider with the punctures confused, the others 

 with single rows; anterior coxae small, more remote than their own width; proster- 

 num nearly flat, slightly impressed at the constriction, with two deep punctiform 

 grooves and two obsolete rudimentary carinse each side, the exterior one very short ; 

 abdomen sparsely punctate at the middle, densely at the sides and apex ; tarsi with 

 the first joint as long as the two following, the terminal joint as long as the three 

 basal joints combined. Length, 3.8 mm. 



Two examples were collected in the sand-dunes at Great Salt Lake, 

 Utah (June 25), by Messrs. Hubbard and Schwarz, who have presented 

 one of them to the National Museum. Type No. 1404, U. S. N. M. 



Pachybaris xanthoxyli, sp. nov. 



Form and size of P. porosus Lee. -Robust, convex highly polished, black, elytra, 

 antennce and legs rufo-piceous ; vestiture very sparse of snow-white scales, smaller and 

 narrow on the ventral surface, larger and obovate on the elytra and sides of thorax ; 

 beak slender, strongly arcuate, coarsely punctato-striate, separated from the front by 

 a deep transverse impression ; the prolongation of the antennal scrobes towards the 

 apex broad and deep, not gradually narrowed as in P. porosus ; head sparsely and 

 finely punctate; thorax strongly constricted, almost tubulate at apex; disc finely and 

 sparsely punctate, a line of coarse punctures on the apical constriction, the inflexed 

 sides coarsely rugose ; basal lobe obsoletely emarginate ; scutellum small, trapezoidal; 

 elytra with narrow, deeply impressed, feebly crenulate grooves ; intervals very broad 

 and flat, each with a single series of small scale-bearing punctures; prosternum in 

 front of the coxae deeply canaliculate. Length, 4 mm. 



One example collected by Mr. E. A. Schwarz on Xanthoxylum 

 pterota, at San Diego, Texas. Type No. 1405, U. S. N. M. 



By the deep frontal groove this species approaches the genus Lino- 

 notus Casey, but the small scutellum and the want of antecoxal processes 

 associate it more naturally with Pachybaris. 



Oligolochus robustus, sp. nov. 



Oval, convex, robust, shining, rufo-piceous ; beak, antennal funicle and legs ru- 

 fous ; vestiture of dorsal surface consisting of large yellow scales, forming three broad 

 longitudinal viUae on the thorax, the median vitta inturrupted at middle, smaller spots 



