June, 1897.3 Linell: New North American Curculionid^e. 
53 
Onychobaris rufa, sp. nov. 
Oval, convex, shining, entirely rufo-ferruginous, clothed with very short, incon¬ 
spicuous setae; 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. sub to ns a Lee., the punctures circular, less than one- 
third the width of the scutellum, not in contact on 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; striae abrupt, not very broad, obsoletely punc¬ 
tate; intervals flat, twice as wide as the 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 carinae 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 Pporosus Lec.-Robust, convex highly polished, black, elytra, 
antennae 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; 
e ytia 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 
ongitudinal vittae on the thorax, the median vitta inturrupted at middle, smaller spots 
