384 CASEY 



2 — Body stout, oval, polished, with strong bronzy lustre, the legs black 

 with strong metallic lustre, the antennae somewhat piceous ; pubes- 

 cence yellowish, long and suberect anteriorly, dense on the head 

 along the eyes and on the epistoma, rather sparse but very con- 

 spicuous on the pronotum, shorter and very unevenlv distributed 

 on the elytra and almost wanting on the upper convex parts of the 

 surface ; head nearly as long as wide, convex anteriorly ( 9 ) or 

 nealy flat ((^), coarsely and sparsely punctate, closely near the 

 eyes, each lateral lobe isolated by a broad deep groove extending 

 to the apical margin, the epistoma angulate, the eves large, rather 

 flat, minutely faceted ; prothorax three-fourths wider than long, 

 the apex not quite three-fourths as wide as the base, all the angles 

 acute, the anterior very prominent anteriorly, the sides nearly 

 straight, the punctures deep but rather fine, sparse, becoming less 

 sparse but only a little larger near the sides, with an imperfect 

 slightly elevated impunctate median line ; elytra between three 

 and four times as long as the prothorax and a third wider, the 

 humeri broadly rounded to the prothorax, the sides feeblv sinuate 

 behind them, arcuately converging in apical third, the apex obtuse, 

 the punctures minute and sparse, becoming but slightly larger, 

 though closer and very uneven laterally, confused throughout ; 

 sutural region toward apex deeplv concave; abdomen minutely 

 punctate, sparselv so and glabrous medially, closely and hairy 

 laterally. Length 13.S-13.S mm. ; width 6.2-6.45 mm. ^Ie>^ico 

 (Guerrero) ... * cavicauda n. sp. 



Body stout, similar to the preceding in form, color and lustre but 

 smaller and somewhat more densely clothed with long yellowish 

 pubescence, shorter and more appressed on the elytra ; head similar 

 but with smaller lateral lobes and shorter antennal joints ; pro- 

 thorax similar but much more finely punctured toward the sides ; 

 elytra very finelv and closelv punctured laterallv. Length 12.0 

 mm. Mexico (Almolonga) * plicatus Champ. 



3 — Form elongate-oval, convex, dark jeneous, the surface not coarsely 

 and very sparsely punctured ; prothorax broader than long, nar- 

 rowed in front, feebly emarginate anteriorlv, the sides feebly 

 rounded from the base, the angles acute, the base strongly bisin- 

 uate ; elytra with cinereous pubescence arranged in irregular 

 patches, the apex apparently emarginate, the marginal line not 

 extending to the apex but terminating in a small tooth near it, the 

 base emarginate and with a faint impression within the humeri ; 

 under surface finely punctured and sparselv clothed wuth cinereous 

 pubescence. Length 1 1. 5-12.0 mm. Arizona (Camp Grant, — 

 under mesquxte bark) dentiger Horn 



It is quite possible that cavicauda, which is represented before 

 me by a good series, may be identical with the more southern 

 and eastern plicatus, but the language used by Mr. Champion 

 in regard to the epistoma and anterior angles of the prothorax 



