H. C. FALL. 167 



cinereous laterally, more conspicuously so in an anterior and a poste- 

 rior sublateral spot. In bivulneratus the pronotal pubescence is nearly 

 uniform in color. Length, 2.2 mm. ; width, 1.4 mm. 



Santa Rita Mountains. Arizona. Taken by Prof. Snow 

 and by Hubbard and Schwarz. 



B. discopterus n. sp. 



Moderately stout, black, elytra rufotestaceous with the sutural inter- 

 space and base narrowly black ; antennas and legs entirely pale rufo- 

 testaceous ; pubescence rather sparse, uniformly ochreo-cinereous. 

 Antennas short, not passing the humeri, very strongly incrassate, fourth 

 joint as wide as long, 5-10 transverse, the outer ones about twice as 

 wide as long. Eyes moderate, separated by about their own width. 

 Head finely closely punctate and dull, front not carinate. Prothorax 

 a little wider than long, conical, sides feebly evenly arcuate, not ap- 

 preciably sinuate behind, punctuation close and rather coarse, finer 

 punctures not very evident. Scutellum short, apparently emarginate 

 behind, clothed with denser pubescence. Elytra as wide as long or 

 very nearly so, sides broadly arcuate, striae fine, evidently punctate, 

 intervals flat, finely rugoso-punctate. Pygidium thinly nearly evenly 

 pubescent, rather coarsely and closely not very shallowly punctate. 

 Hind thighs moderate, armed with a single small acute tooth near the 

 apex ; hind tibiae feebly obtusely carinate externally, the inner apical 

 mucro short, not apparently longer than the other marginal denticles. 

 Length, 2 mm. ; width, 1.2 mm. 



Elsinore, Southern California (Prof. C. F. Baker). 



With the type I place a second specimen from the same 

 source and similarly labeled, which agrees so perfectly in 

 most respects that I can scarcely doubt their identity. Both 

 specimens appear to be males, but of this I am not certain. 

 This second example is a little more robust and with slightly 

 stouter hind thighs armed with a longer tooth ; the color is 

 black, the elytra with only a small diffuse median pale spot 

 on each elytron, the pubescence ochreo-cinereous in a broad 

 transverse fascia on the elytra, but anteriorly and apically it 

 is dark and unconspicuous, resembling in this latter respect 

 bivulnerahis. As in bivulneratus the elytra seem to be a little 

 impressed along the suture in this second specimen, but not 

 appreciably so in the type. 



The species is obviously related to bivulneratus, but is 

 smaller, less stout, the prothorax less transverse, the an- 

 tennae and legs entirely pale, the median line of the prothorax 

 not or scarcely impressed at base. 



TRANS. AM. ENT. SOC, XXXVI. JULY, 1910. 



