NORTH AMEKICAX COLEOPTERA. 17 



A. vittatus Siiy.— Oblong, subcylindrical, piceous or l)hick, each elytron 

 with a basal and apic-al rufous spot more or less coufluent and rarely with the 

 elytra entirely rufous, except margin and suture, or entirely black ; legs reddish 

 brown, the tarsi paler. Antennse rufous, club darker. Head sparsely punctate 

 and alutaceous, front tritulierculate, clypeus subtruncate feebly emarginate, sides 

 arcuate, gense scarcely prominent. Thorax slightly narrower in front, the sides 

 feebly arcuate, hind angles distinct, but obtuse; basal marginal line distinct, disc 

 moderately convex, surface closelj' punctate with unequal i)unctures. Elytra 

 parallel, humeri distinct, disc finely crenately punctato-striate, intervals flat with 

 numerous fine punctures. Body beneath alutaceous, sparsely punctate. Me.so- 

 sternum opac^ue in front, carinate between the coxge. Posterior femora sparsely 

 punctate. Length .14-.20 inch ; 3.5-5 mm. 



Sexual characters. — The frontal tubercles are more prominent in the male, and 

 the spurs of the anterior tibia somewhat stouter. 



As indicated above this species varies in tlie color of the elytra, 

 from the form with those entirely red except the side mar<iin and 

 suture to others entirely black. 



I have seen this species from every region of our country except 

 from California. 



A. guttatus Esch. — Oblong oval, feebly convex, shining, piceous l)rown, 

 spotted with red. Antennae dark red. Head feebly convex, front trituberculate 

 with an anterior transver.se plica sometimes obsolete, surface posteriorly moder- 

 ately densely punctate, in front rugose. Clypeus truncate, feebly emarginate, 

 the angles rounded, genie subacute, moderately prominent. Thorax slightly nar- 

 rowed in front, the sides straight, hind angles obtuse, disc spar.sely punctate at 

 middle, more coarsely at the sides, the punctures very unequal. Elytra as broad 

 at base as the thorax, the sides moderately arcuate, the strire with moderately 

 large punctures, the intervals flat, with fine scattered punctures. Body lieneath 

 dark reddish brown. Mesosteruum carinate between the coxie, in front smooth, 

 on each side punctate. Legs brownish red. Anterior tibise acutely tridentate, 

 above distinctly crenate. First joint of hind tarsus as long as the next three 

 Joints. Length 2.5-3 lines. 



This species is unknown to me in nature, and the above desci'ip- 

 tion is copied from that of Baron Harold. As remarked by thi.^^ 

 author the species seems closely related to conx/regatn-s and nleidus. 

 In fact the detailed description given of the red spaces on the elytra 

 is almost exactly that of specimens seen of cour/ref/atux, and only the" 

 positive assertion of Baron Harold that the mesosternum is carinate 

 causes me to believe the two species distinct. It must be remeniberd, 

 however, that Erichson (Insect. Deutschl. iii, p. HI 4) i)laces the spe- 

 cies in a series with simple mcsosternuni. 



Occurs in Alaska, Unalaschka. 



TKANS. AMEK. ENT. SOC. (3) .lANM'ARV, 18S7. 



