AMERICAN COLEOPTERA. 165 



little more than half as long as the longitudinal thickness of the latter. Tarsi 

 slender, the first joint equal to or slightly longer than the next two ; third joint 

 not at all, fourth very feebly emarginate at tip. Length 2.S mm. 



Williams. Arizona, July 22nd ; collected by Barber and Schwarz. 

 A single specimen, probably a male, is all I have seen of tins neat 

 little species. It differs from typical Oligomerus in its more slender 

 tarsi with third and fourth joints not or scarcely emarginate and in 

 its distinctly separated front coxse, but it agrees nearly with sericans 

 in this latter respect. 



2. O. sericailS Melsh. — Pieeous brown, head and thorax shining with small 

 scattered granules; elytra finely scabious, punctate-striate, the inner rows of 

 punctures irregular and more feebly impressed, a few minute granules in the 

 basal regiou. Head and prothorax with short erect fuscous hair, elytra similarly 

 clothed, but the hairs distinctly inclined. Vertical diameter of eye a little 

 greater than half the width of the front in the£,. less than half the width of the 

 front in the J. Antenna? scarcely half the length of the body, first joint elon- 

 gate, not much thickened, a little bent; second oval or elliptical, about half as 

 long as the first and narrower; third and fourth still shorter, subequal or with 

 the third a little longer; fifth to seventh similar to each other, very short, trans- 

 verse; eighth to tenth about equal in length, twice as wide as the preceding and 

 each as long as 2-7 united in the ty , still longer and more parallel in the £> . 

 Beneath finely punctate and pubescent. Length 3-4.5 mm. 



Massachusetts, New York, Pennsylvania, District of Columbia, 

 Virginia, Ohio, Kentucky, Michigan, Minnesota, "Canada." 



Two examples in the LeConte collection are labelled "June 24 

 Carya" and "June 24 White Oak." 



3. O. californieus n. sp. — Sleuder, subcylindrical, brown ; antennae slen- 

 der, all the joints longer than wide; second, third and fourth subequal in length, 

 the second a little stouter; sixth a little shorter; fifth and seventh again slightly 

 shorter and subequal ; ninth joint a little longer than the three preceding, elon- 

 gate-triangular, the apical angle obtuse. Prothorax rather strongly elevated and 

 compressed posteriorly, a feeble channel from the summit of the elevation to the 

 front margin; surface finely granulate. Elytra not wider than the prothorax, 

 feebly striate, the stria' finely punctate, the rows of punctures somewhat irregu- 

 lar uear the suture. First joint of tarsi as long as the next three, fourth very 

 feebly, third scarcely at all emarginate at tip. Length 4 mm. 



California (Sisson). 



Described from a single female specimen in the Hubbard and 

 Schwarz collection. 



This is the only species thus far discovered in the true Pacific 

 Coast region. In its slender antennal stem and almost unemargin- 

 ate fourth tarsal joint it agrees with the Arizouan tenellus. 



TRANS. AM. ENT. SOC. XXXI. MAY, 1905. 



