€08 Col€opterolo(jical Notices, VI. 



reflexed at apex, the angles broadly obtuse and rounded; antennal club well 

 developed and as long as the first four joints of the stem, the fourth palpal 

 joint twice as long as wide, oblicjuely pointed, excavated as usual and just 

 one-half as long as the antennal club. Prothova.c scarcely more than one-half 

 wider than long, the apex not more than two-thirds as wide as the base, the 

 sides strongly' convergent and only very feebly ai'cuate from base to apex, just 

 visibly more prominent a little before the middle; apex feebly emarginate; base 

 strongly and arcuately lobed in the middle, the basal angles rounded; disk 

 rather finely, indistinctly and densely punctate. Elytra but slightly longer 

 than wide and nearly one-half wider than the prothorax, the sides parallel and 

 somewhat strongly arcuate ; disk feebly and not very densely i)unctate. Pygi- 

 dium three-fifths wider than long, moderatelj' convex. Abdominal segments 

 connate, the fifth alone free as usual. Length 19.0 mm.; width 10.5 mm. 



California (Los Angeles). Mr. River.s. 



This species maj- be distinguished at once by the outline and 

 size of the prothorax, the sides being straighter and more con- 

 vergent from base to apex than in an}- other known to me. I 

 have before me onl^y a single male, another perfectly similar speci- 

 men being at present in the cabinet of Mr. Rivers. 



T. riversin. sp. — Olilong-oval, convex, somewhat shining, pale brownish- 

 testaceous throughout, the knees minutely blackish; body clothed rather 

 sparsely with fine decumlient yellowish hairs, denser along the median line 

 and toward the sides of the pronotum; head, pronotum, sterna and femora 

 clothed in addition with long erect and conspicuous yellowish pile. Head 

 much less than one-half as wide as the prothorax, the clypeus narrowed at 

 Ijase, strongly concave, broadly arcuato-truncate at apex with the angles blunt 

 and rounded; antennie well developed, the club almost as long as the stem; 

 fourth palpal joint rather small, excavated, two-fifths as long as the antennal 

 club. Prothorax slightly less than twice as wide as long, broadly subangulate 

 at the sides just behind the middle, the angle rounded, the disk at this point 

 much wider than at base; apex two-thirds as wide as the base, broadly, cir- 

 cularly emarginate, the base arcuately lobed in the middle, the angles obtuse 

 but very distinct and only slightly blunt: disk rather coarsely deeply closely 

 and distinctly punctate. Elytra nearly one-fourth longer than wide, fully 

 two-fifths wider than the prothorax ; sides parallel, somewhat arcuate toward 

 apex, the latter very broadly arcuato-truncate; disk somewhat coai'sely, 

 sparsely, unevenlj^ and rather feeljly punctate, the sculpture finer and denser 

 along the suture. Pygidium feebly transverse, moderately convex, rather 

 finely but subrugosely punctate, sparsely pul)escent, subglabrous near the apex. 

 Length 20.0-23.0 nun.; width 10.0-12.0 mm. 



California (Los Angeles). 



The description given above is drawn from the male, and the 

 female, judging from a specimen before me, is larger, wnth the 

 vestiture rather dense, the antennal club being oval and but 



