North American Rhyncliophora. 249 



tion of the base ; disk convex, finely, rather deeply striate; striae finely, 

 deeply, but not very closely punctate; intervals flat, even, equal. Legs 

 rather densely granulose, each granule being formed by a thick rounded 

 scale, covered with a shining coating, rather densely setose. Abdomen 

 rather strongly and densely punctate. Length 6.5 mm. 



California (Humboldt and Siskiyou Cos. 2). 



Not closely allied to any other described species, but belongs 

 in the neighborhood of rauca. 



A. rauca Horn — Proc. Am. Phil. Soc, XV., p. 51. — Four 

 specimens from the neighborhood of San Francisco appear to 

 coincide well with the original description of this species. The 

 type specimen was undoubtedly a male ; in the female the 

 elytra are decidedly more inflated and the form more robust. 



A. te$«§elata n. sp. — Form robust, oval, convex, moderately densely 

 clothed with pale brownish fulvous scales ; prothorax with arcuate in- 

 terrupted lateral vittae and a very narrow median line black, alternate 

 intervals of elytra with darker and paler spots giving a tesselated ap- 

 pearance, more evident on the third interval behind ; setas rather dense, 

 moderate or rather short, pale yellowish, irregularly arranged on the 

 elytra, more prominent on the pronotum. Head hemispherical ; beak 

 much longer than the head, fully one-half longer than wide, dilated at 

 apex, flattened, obsoletely subcarinate in the middle toward base ; 

 basal transverse impression strong ; surface finely, deeply, very densely, 

 and subrugulosely punctate ; beak not at all squamose, setose ; head 

 with squamulose hairs ; antennae rather robust ; scape short, just at- 

 taining the middle of the eye, gradually and rather strongly clavate, 

 distinctly shorter than the funicle ; basal joint of the latter slightly 

 longer than the second. Prothorax nearly one-third wider than long ; 

 sides broadly, evenly, and rather feebly arcuate ; base truncate, much 

 wider than the apex ; the latter feebly sinuate in the middle ; disk 

 broadly convex, with a narrow, deeply impressed median canaliculation 

 from the middle nearly to the apex, finely, deeply, densely, and sub- 

 rugulosely punctate, not granulate. Elytra convex, oval, less than one- 

 half longer than wide, three-fourths wider than the prothorax ; sides 

 broadly, distinctly arcuate ; humeri very broadly rounded, obsolete ex- 

 ternally, basal angle right, not rounded ; base broadly emarginate ; 

 disk finely striate ; striae feebly impressed, with small, rounded, rather 

 distant punctures, each of which bears a very minute, subrecumbent, 

 pale seta ; intervals broadly, feebly convex. Legs very sparsely 

 squamose, with long erect setae. Abdomen rather finely, deeply, and 

 moderately densely punctate ; first suture arcuate, and impressed for a 

 very short distance in the middle. Length 5.5 mm. 



California (San Francisco 3). 



