120 GEORGE H. HORN, M. D. 



ately punctulate. Palpi and antennse rufo-piceous, club cinereous. Body be- 

 neath piceous, legs rufo-piceous." Length 3\ lines (.29 inch; 7.5 mm.) 



Occurs in Russian America, Peninsula Keaai. 



Easily known by the above characters. Unknown to me in 

 nature. 



A. pectoralis, Lee. Pacif. R. R. Rep. 47 parallel, App. i, p. 41.— Oblong, 

 black, convex, shining. Head coarsely punctured and slightly rugulose in 

 front, vertex smoother and more sparsely punctured; front distinctly trituber- 

 culate; clypeus broadly rounded, feebly emarginate at middle, genaj obtusely 

 rounded, feebly prominent. Thorax strongly convex, sparsely and coarsely 

 punctured; base distinctly margined. Elytra striate, striae not coarsely but 

 approximately punctured ; interstices flat, very finely alutaceous, more coarsely 

 toward apex, which is sub-opaqu9. Beneath black, legs pieeous-black, an- 

 tennse rufous, club darker. Length .20 inch; 5 mm. 



Type from San Francisco, others from Russian America. 



The color of this species is very black, and may easily be recognised 

 by the characters given in the table. The mesosternum is strigose. 

 The elytral interspaces, especially toward the apex, exhibit decided 

 traces of an alutaceous sculpture, which renders the apices of the ely- 

 tra decidedly opaque. The specimens from Russian America have the 

 elytral striae scarcely as well defined, and the interstices are apparently 

 flatter. These slight differences hardly seem to warrant the separa- 

 tion of them as distinct species. 



Group F contains but two species, differing from those of the pre- 

 ceding group by the mesosternum being distinctly carinate between 

 the middle coxa3. 



A. granarius, Linn. Syst. Nat. i, 2. p. 547. Harold, Berl. Zeitschr, 186.3, 347. 

 quadrituherculatus, Fab. Syst. El. 75. vietallicus, Hald. Journ. Acad. Ser. ii, voj. 

 i, p. 105. spretus, Hald. id. p. 106. 



This species is cosmopolitan, occurring in every quarter of the globe 

 and very abundant wherever it occurs. Specimens have lately been 

 received from various parts of maritime California. Length .16 — .25 

 inch; 4 — 6 mm. 



So much space has already been given to the description of this 

 species that it is not deemed advisable to add anything further, the 

 student is referred to that of Harold above cited. 



A. vittatus. Say, Journ. Acad, v, 191. Harold, Berl. Zeitchr. 186.3, 355. — 

 Black, shining, moderately elongate and sub-cylindrical ; elytra with a basal 

 and apical rufous spot, often confluent into a broad stripe. Head densely and 

 finely punctured, front distinctly trituberculate, clypeus feebly emarginate. 

 Thorax punctulate, more densely toward the sides. Length .14 — 20 inch; 

 3.5 — 5 mm. 



This species is readily known by the few characters above given. 



