38 GEO. H. HORN, M. D. 



Occurs in various parts of California, near San Francisco, at 

 Alameda, in the southern coast range, Owen's Valley and in Arizona. 



A. Iliilitsiris Lee— Form moderately elongate and parallel, pale reddish 

 brown, shining. Antennfe pale. Head convex, a distinct tubercle on each side 

 of vertex, densely and rather roughly punctured ; clypeus subtruncate, feebly 

 emarginate, with two small recurved teeth widely separated, sides arcuate and 

 fimbriate, gense feebly prominent, obtuse. Thorax equally wide at apex and 

 base, sides feebly arcuate sparsely fimbriate, hind angles very broadly rounded, 

 base regularly arcuate, with fine marginal line ; disc convex, the punctures equal, 

 moderately coarse, closely but not densely placed, denser at the sides. Elytra a 

 little wider than the thorax, humeri obtuse, margin with short hairs, striate, 

 striffi finely and closely punctured, intervals very slightly convex and with punc- 

 tures coarser than those of the strife, irregularly placed, with minute punctures 

 intermixed. Body beneath sparsely and indistinctly punctate. Anterior tibiae 

 smooth in front, strongly tridentate externally, not crenulate above, first joint 

 of tarsus shorter than the second. Posterior femora sparsely punctate, the first 

 tarsal joint not as long as the next three. Length .20-.24 inch ; 5-6 mm. 



3Iale. — Anterior tibiae sinuate on the inner side, the tibial spur entirely want- 

 ing, the apical tooth more slender and acute than usual. Upper spur of middle 

 tibia shorter than the lower, but acute. 



Female. — Anterior tibiae normal, the spur small and acute, the apical tooth 

 slender and long. 



In this species the clypeal teeth are small and acute, and resemble 

 the projecting tips of the labial palpi. The hind angles of the thorax 

 are so broadly rounded that the sides and base are continuous with- 

 out interruption. The intervals of the striae had been described as 

 densely punctulate, but the punctures are so minute as not to affect 

 the polish of the surface. The mesosternum is not carinate, as the 

 new and clean specimens now before me show, those previously ex- 

 amined in the cabinet of Dr. LeConte were not in good state. 



The male sexual characters are unique, and Avhile at least one 

 other species has the front tibia sinuate on its inner side, this is the 

 only one with the tibial spur absent. 



Occurs in California from Siskiyou Co. (Fuchs) to San Diego 

 (Lee.) and in Nevada. 



A. scintilus n. sp. — Moderately elongate and convex, reddish brown, shin- 

 ing. Antennae testaceous, club fuscous. Head moderately convex, slightly tu- 

 berculate each side, moderately densely and coarsely punctate, but not rugose ; 

 clypeus broadly, but feebly emarginate at middle ; a small, slender, acute tooth 

 each side, turned upward, a slight carina running backward from each tooth, 

 sides of clypeus arcuate, sparsely fimbriate, genae moderately prominent, sub- 

 acute. Thorax slightly narrower in front, the sides feebly arcuate, hind angles 

 distinct, but obtuse ; base arcuate, on each side slightly oblique, a very fine sub- 

 marginal line; disc moderately convex, punctuation moderately coarse, not 



