122 Mr. G. C. Champion's Revision of the Mexican 



excepted) and legs. Another female, from San Geronimo, 

 with darker legs and antennae probably belongs here. 



13. Listrus aeratus, n. sp. 



$. Elongate, widened posteriorly, feebly convex, shining; of a 

 bright brassy or greenish tint, joints 2-4 of the antennae, and 

 the legs (the tips of the tarsi excepted), rufo-testaceous, for the 

 rest infuscate; finely cinereo -pubescent, the marginal cilia of the 

 elytra rather long. Head comparatively small, finely piinctulate ; 

 antennae very short, widened outwards, joints 5-10 serrate, 5 

 triangular, larger than 6, 6-10 transverse, 9 and 10 broader than 8, 

 11 short-ovate. Pro thorax transverse, convex, obliquely narrowed 

 from about the middle forwards, the hind angles distinct; closely, 

 minutely punctate. Elytra considerably wider than the prothorax, 

 narrowing from a little beyond the middle, somewhat acuminate 

 at the tip ; closely and somewhat coarsely punctate in their basal 

 third, the puncturing thence to the apex much finer and more 

 diffuse. 



Length 2J-2f mm. 



Hah. Mexico, Orizaba {F. D. Godman and H. H. Smith). 



Four specimens, apparently all females. Less convex 

 than L. crenicollis, the prothorax shorter and flatter, and 

 much more finely crenulate along the sides. From L. 

 corallipes, Gorh., it may be known by its more elongate, 

 less convex form, subacuminate elytra, more shining 

 surface, etc. 



14. Listrus semiopacus, n. sp. 



(J. Narrow, subcylindrical, somewhat convex, moderately elon- 

 gate, the head and prothorax dull, the elytra shining; black, with 

 a slight aeneous lustre, the second joint of the antennae, and the 

 tibiae and tarsi (except at the tips), rufescent; finely pubescent. 

 Head broad, and except along the smooth raised central portion 

 of the epistoma, opaque, densely, rugulosely punctate; antennae 

 short, joints 5-10 strongly transverse, 5 a little broader than 6, 

 and 9 and 10 slightly wider than 8, 11 ovate. Prothorax transverse, 

 broad, rounded at the sides posteriorly, obliquely, narrowed in 

 front; densely, rugulosely punctate, with an indication of a short 

 smooth median line. Elytra subparallel in their basal half, very 

 little wider than the prothorax, conjointly rounded at the apex; 

 densely, finely punctate, the puncturing becoming a little coarser 

 at the base. Intermediate tibiae with a stout blunt tooth at the 

 inner apical angle. 



